[COMM] Flygrowth Drive

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Story Summary: Flygon dude eats some transformation-inducing candies on stream to fund a game he wants to make, and his gabite sister gets involved.

Word Count: 18418

Another kink-filled commission for Iamabudgie!

After the dragon story, I never thought I'd make a story that long for a good while, but a bit over a week later and here I am, beating it in length by about 3000 words. Whew.

I've wanted to do something like this for a while, but couldn't really think of anything solid until budgie gave me this! Each transformation was picked by a random number generator, as well as how many he had to eat each time. RNG is always an interesting idea for me in stories like this, since it could either go poorly or very very well. I'm glad to say this turned out quite nice.

Tags: transformation, permanent, incest, brother and sister, growth, hyper, hyper tongue, hyper tail, hyper balls, hyper prostate, denial, edging, camshow, streaming, overstimulation, hypersensitivity, fisting, domination, petplay


Xavier the flygon was in his room, setting up his camera and microphone on his computer. Though he considered himself good with computers and programming, and played games often, he'd never really tried his hand at streaming. He was planning to make a small game of his own, but if he didn't put full effort towards it it'd take years to complete. If he did put all of his time into creating the game, it'd only take a few months, but he'd have no time to work, and couldn't pay for his apartment. He lived with his gabite sister, Sierra, but there was no way he could ask her to do all that, especially when he wasn't sure how long it'd take. He'd need about $5000 to pay for rent while he makes the game, money he didn't currently have.

Streaming wasn't exactly the most lucrative job for beginners.. or at least, that was the case for streaming games. He had something else in mind, something that tended to be much more profitable. For a while he'd heard of, and seen a few, videos of people buying transformatives and letting viewers donate for them to be used. Most people did rather tame transformations that usually resulted in nothing more than them having larger genitals and a curvier frame, but the more extreme people who made insane, permanent changes tended to make more money. He went for somewhere in the middle, having bought some relatively cheap transformatives that were neither too insane nor long-lasting.

Cheaper items weren't always the safest, but he was assured that he was at no risk at being ill and these ones worked on all types of pokemon. That didn't mean he wasn't nervous though. He'd sent his fair share of dick or butt pics to a few friends, even uploaded a short video or two online, but he didn't exactly have a model body. He had a lithe build, but he was a bit over a foot shorter than most flygons, and his member was even smaller. At least people couldn't normally tell, since it was usually hidden away in his genital slit. Fortunately for him, people on that site seemed to love watching the most normal people turn into freaks. He shivered as he thought of himself turning into a "freak". He wanted the money, but he didn't exactly want to permanently disfigure his body.

He didn't realize how long he was sitting there blanked out, snapping out of it when he heard the doorbell ring. It must've been his sister. He got up from his chair, sliding on a shirt (with adjustments made for his wings of course) so he was wearing more than his underwear, rushing to the door and opening it. There was nobody standing there, even when he looked down the hall there was no one there. On the floor in front of him was a cardboard box wrapped in an excessive amount of tape, his eyes widening. He immediately knew what it was, taking it inside and shutting the door. Hopefully there'd be no complaints about him slamming it.

He set the box down on his bed, pulling out some scissors and cutting it open. On the inside, was.. bubble wrap. Well, that was to be expected, but he could play with it later. He carefully pulled it out, revealing the eight, small, glass jars stored inside the box. He pulled one out, revealing about ten little round candies in rainbow wrappers inside, as well as a label on the side that read "#1: Penis grower" written in marker. He took the other jars out too, all of them containing identical-looking candies with different labels. Ball growth, prostate growth, sperm growth, tongue growth. The list went on, and each one made him blush more. He didn't know how much they would grow him at all, but it was safe to assume that taking more doses of one would have stronger effects. That wasn't up to him though, his viewers would need to decide which he took and how many. In his rush and excitement, he never even noticed the warning sheet hidden underneath all of the bubblewrap.

He figured now was a good time as any to start the stream, since his sister wasn't home. He set the jars on his desk, making sure to not take the candy out yet to avoid confusion. He even got out his only toy, a somewhat small knotted dildo, and a bottle of lube. He sat in his chair, making sure the camera and microphone were properly set up before going to the most popular transformation website he knew. He already had an account made and ready, but until now he never streamed anything himself. He stared at his screen for a while, hovering his cursor over the button to start streaming. Am I really going to do this..? He thought to himself. He couldn't think about stopping in the middle of a stream, but he was even more worried about what could happen to him. Not to mention he already bought the candies. He looked over at the jars with a sigh. Perhaps he could stretch it out over a few days, both to give him more time and so he could get more viewers over time.

He made his decision, clicking the start button and sitting back. He stood up, turning away to strip off what little clothing he was wearing. It'd probably take a bit for anyone to join, so he assumed he had time to get naked before then. He resisted the urge to tuck his tail between his legs as he pulled his underwear down, his cock already poking halfway from his slit. He turned back to his screen, sat down, and had a double take. There were already nearly one hundred viewers, with the number slowly rising. It only took a quick look at the chat to see that they weren't just bots, either. "Uh, h-hey!" He stammered. In his current position, his crotch wouldn't currently be visible on the stream, but that didn't stop him from instinctively covering himself with a hand. "I didn't expect so many of you to join so quick, uh.." He mumbled, trailing off as he tried to think of what to say. "Oh! Well, today I'm going to be uh.. eating some candies! I don't mean normal candies though.These ones will make me grow bigger when I eat them, you can pay to give me one or pay more to give me more than one, and they, um.. Just look at the channel description, it's all there." He huffed.

"F-for now though, I guess I'll just uh.. Play with myself." He wheeled his chair back, slowly bringing most of his body into view, including his throbbing dick fully erect from his slit, coated in a thin sheen of its natural lubricant. A few people in the chat mocked how small it and his balls were, but he was expecting it. Not that it didn't hurt. As nervous as he was about jerking off in front of what was now over four hundred people, part of him was excited too, and he started to slowly stroke his length with one hand. A few small donations were already coming in, but none were enough to give him a candy. He didn't give up though, the stream only just started.

After a few minutes when he started to suspect that no one cared to pay enough for a candy, there was a loud ding that nearly made him fly out of his chair. "Thank you for the donation!" He smiled at the camera, leaning forwards to see what they chose for him. His eyes widened, a bit nervous that he'd have to eat one of the tongue-growing candies first and a bit more surprised that he didn't have to eat one of the cock-growers yet. He opened the jar, picking one of the small candies out and unwrapping it. It looked safe enough, just having a smooth, white surface. "Let's do this.." He popped it in his mouth, sucking on it for a bit while a hand idly toyed with his dick. He was pleasantly surprised to find out it had a sweet, fruity taste, and he had to stop himself from reaching for another.

Before long there was nothing left of the piece he ate, and he licked his lips. At first he didn't even notice the change, but when he licked a little bit of sugar from his finger, more tongue than normal slipped out and flopped against the side of his finger. He almost immediately slipped his tongue back into his mouth in surprise, looking back and forth between his hand and the camera. "Wow, uh.. I guess it works!" He laughed a bit, slowly letting his tongue out as far as it would go. It still wasn't too long, only an inch or maybe two longer than before and just a little bit thicker, but it was enough for him to notice now. He could even feel it better, as if he was more aware of everything his tongue was feeling. He gave it a little tug, perhaps a bit too hard as he pulled his head forwards. "S-sorry guys, I'll get back to.. Work." He huffed loudly, resisting the temptation to continue playing with his tongue while he started stroking himself off again. If all of the transformations were like this, maybe it wouldn't be so bad..? He could think about that later.

He stopped rubbing himself, looking towards the camera as he slowly licked his hand clean of precum and slitfluid. It was far from the greatest taste, but his viewers seemed to enjoy watching it. He grabbed his dildo, making sure the camera caught as he poured plenty of lube onto it and rubbed it around. He had to move his chair back a bit further for everything to be seen, bringing one of his lubricated hands down and gently pushing a finger right into his tight tailhole. As much as he'd tried in the past he could hardly loosen himself up, so no matter how much he prepared he could never take the knot on his toy. Still, he was very eager to replace his finger with the tip of his toy, biting his lip as the first inch slid into him and letting out a rather feminine moan. He didn't pay attention to the viewer count anymore, worried about getting stage fright, but the chat was more than a little bit active. "T-thanks for the donations..!" He grunted, trying to relax as the dildo was pushed deeper and deeper, his other hand starting to jerk himself off again.

He wanted to go slowly so he could last longer before cumming, but even as he quickly stroked himself he found that he wasn't too close to the edge. He worked the dildo back and forth in his rump, pushing it a bit deeper with every gentle thrust in. Soon enough the knot was pressed against his rim, and he felt absolutely stuffed. Precum spurted from his tip, splattering on his belly as he clenched around the toy, lightly pressing against his sensitive prostate. He shuddered, letting out a long moan as his tongue flopped from his mouth, nearly falling out of his chair. It didn't exactly feel any better than usual, but something about showing himself off to so many people had his head filled with lust. It took another while until he heard someone donate another candy, squinting slightly at the screen. "Thank y-you for the candy.." He mumbled. They wanted him to eat one of the ball-growth candies, the thought making him shiver. Even though he already had one of the candies, the idea of something altering his most vulnerable part brought his nervousness back to the surface. On the plus side, his balls wouldn't be so small anymore.

He reluctantly let go of his shaft and the toy inside him, opening the second jar and unwrapping one of the candies inside, dropping it into his mouth. He backed up as he sucked on the fruity treat, making sure the camera could see between his legs for when the transformation happened. He kept one hand gently squeezing his balls, and this time the change was definitely more noticeable. He could both see and feel as his orbs grew larger and heavier, stopping after they went from "small" to "slightly above average". It seemed that his sack didn't grow any bigger, getting a little bit stretched around his thicker balls. He wouldn't admit it, but it made him slightly worried as well- what if they just kept growing, and he got hurt? It'd be tougher to fit in his pants too, or to hide a bulge, not that those worries were as serious as the first.

He did his best to push those concerns aside for now, going back to showing off. "You guys like this, huh?" He gave his length a squeeze with both hands, milking out more precum to cover his hands. The dildo started to slide out of him, but he managed to push it back in with his tail. "Don't forget, you can pay extra if you want to give me multiple!" He gave the stream a shy smile. He was so focused on his video that he didn't hear the door to the apartment open, or the clacking of claws on the floor as his gabite sister stepped inside, back from the gym. She walked up to Xavier's door, going to knock on it but stopping right as she heard something. It sounded like there was a girl moaning inside.. Did Xavier finally get a girlfriend? Despite being two years older than her, the flygon hadn't had nearly as many lovers as his sister. She offered to help him out before, but he was too timid next to her assertiveness, or anyone's assertiveness for that matter, for any advice to really work out.

She was going to leave him alone, but her curiosity got the better of her. Perhaps it was someone she knew? She turned the doorknob as quietly as she could, opening the door just a crack so she could see in his room. She had to hold a hand over her mouth to avoid gasping or laughing. She couldn't see everything from this angle, but she could see more than enough, catching an eyeful of her brother sitting in front of his computer with a camera pointed down at him, moaning loudly with his hands between his legs. She saw the candies too, though she only assumed they were for decoration or some sort of foodplay. She knew he needed money so he could make his game, but she didn't think he was kinky or desperate enough to do this. Maybe she'd ask him about it later, but for now she let him be, silently closing the door and going to her room.

Just after she left he got another candy donation, still stroking himself as he read out what the next candy was. "It's time for a, uh.. tail grower!" He wasn't entirely sure why people would find that hot, but he was given money to do it so he didn't have much choice. It'd be harder to hide from others, but at least it was temporary, nor was it as embarrassing as the others. He ate the candy just like the others, leaning back and moaning quietly as he played with himself. There seemed to be a delay this time, the flygon looking down just in time to feel a large shiver go down his tail, making it straighten out between his legs for a moment before it flopped on the floor. He could feel it brushing against the floor as it grew, curling it up and holding it in his hands. He huffed quietly, as holding his tail felt surprisingly.. nice. Rubbing one of his hands against it made him shiver, giving him similar pleasure to softly stroking his dick. That was certainly unusual, but he couldn't really complain. Right after it finished growing about a foot and a half longer, he gasped sharply as his tail suddenly heated up, almost worryingly hot, before it quickly returned to its normal temperature with a slight heftiness to it. He tried not to look too nervous on the camera as he let his tail down, thudding heavily against the floor. He found that it wasn't as easy to move on its own, more so than it should've been with the extra length.. hopefully that was normal.

As worried as he was about his tail, he didn't want to suddenly stop. "A-alright guys, I'll take one more candy donation before I end the stream for today!" He tried to sound normal, going back to stroking his cock with one hand, while the other lifted and rubbed his tail. "This actually feels pretty nice.." He mumbled, barely loud enough for the viewers to hear. Earlier he assumed his shaft just felt more sensitive because of how horny he was getting, but now he was certain. It was definitely getting more sensitive and touchy on his own, even though he hadn't had anything that grew his cock yet. Maybe it was a side effect of the candies, but even with that added sensitivity he hadn't cum quite yet. He couldn't even stroke himself as fast or as hard, or it started to hurt. He was relieved that it was temporary, at least.

Minutes passed without another candy donation, but in the heat of the moment he forgot about it. More precum covered his hand, and he could only hug his tail close against him as he brought himself right to the edge with his other hand. It felt like he was stuck on the edge for an eternity, but it was really only a few seconds before he finally managed to finish. With a loud cry of pleasure he came all over his belly and chest, plenty more than he normally would, one stray shot even smacking him in the chin. It seemed that the recent change to his balls also made him produce more cum. Sierra could hear it easily from her room, which was right next to his, rolling her eyes and going back to studying. What a slut. She thought, a little bit of a blush coming to her cheeks.

Xavier rested back in his chair, letting his tail flop down and resting his arms to his sides, a bit breathless after such a powerful orgasm. His shaft was still rock hard, but it was still oversensitive from his recent climax. "Oh man, what a m-" He was interrupted by another chime from his computer. "Thank you for the, uhh.." He trailed off, looking at what he was given. Someone had paid for him to eat four more of the tongue-growth candies. He already knew that each one would cause exponentially more growth, but he wasn't sure how much. He hoped his tongue would still fit in his mouth afterwards.

He took four more candies from the jar, unwrapping all of them. It'd probably be safer to take them one after the other, but the thought didn't cross his mind as he dropped all four of them into his mouth. They tasted great, but as they started to take effect they almost lost their sweetness. His mouth felt very warm just like his tail, and he felt a bit nauseous as the candies melted away. The chat was going wild, more than a few people laughing at him for taking multiple at once, not that he noticed. He could feel his tongue tingling inside his mouth, going numb for a brief moment before that feeling faded. It felt like he was going to throw up, clamping a hand over his mouth, heaving.. but instead of vomit, several feet of tongue rolled from his mouth, splatting wetly against his chest, stomach, and even his crotch, the end of his suddenly massive tongue hanging over the edge of his chair. Though most of the growth went towards its length, it was noticeably thicker too. It was quite wet, coated in saliva that got all over his scales. "M-mmph!" He huffed, eyes wide in shock and his heart pounding. He almost called for help, but managed to calm himself down. It was so weird and gross, he was like some sort of depraved pervert.. He brushed a hand against his tongue and shivered, letting out a moan. Oh no.

He gave his massive tongue a few pokes, looking back and forth between it and the camera. He blushed brightly, his dick throbbing. Playing with his tongue like that felt really, really good and he didn't think he could hide it. He nervously grabbed onto his tongue with both hands, giving it a wet squish. Even though it was bigger it wasn't any less soft, squeezing between his hands as he slowly stroked it like a massive cock. He whined and moaned, he felt like he could cum just from this. He got lost in the moment, losing track of time as he played with his fat tongue. After a while he managed to get himself right to the edge, but it wasn't enough to finish him off. While still stroking his slippery tongue with one hand, the other hand reached down, grabbed his dick.. and that was enough. He came just as much as the first time, coating the bottom of his tongue. He sputtered quietly, tasting more than he was really comfortable with. His ass clenched incredibly tight around the toy, making it slip right out of him and fall to the floor. He shuddered as he finished, looking at his slimy hands. He was still getting more donations, but there was no more candy given.

He took a deep breath in, and after a few tries he found he could draw his tongue back into his mouth and seemingly his throat without much discomfort. He could still feel it filling up most of his maw though, and if he wasn't careful it'd start to slide from his mouth again. Hopefully he could get more control over it before his sister noticed, as even if he let only a little bit of his tongue out, the width and thickness of it would be almost impossible to miss. "O-okay guys.. I will try to stream again tomorrow, I'll see you then." Surprisingly he was able to speak normally, despite the recent growth. He wiped a hand off on his leg, leaning forwards to turn off the stream. He closed his eyes, sitting back in his chair as his shaft finally receded back into his slit. It was only the first day, and he'd already had some big changes, especially to his tongue. Supposedly the changes wouldn't take too long to wear off, but he wasn't sure if that changed with multiple doses of the candy. He had a gut feeling that something had gone wrong, but he brushed it aside as something the huge tongue was causing.

He wiped off his scales with a used shirt, making sure he got clean as possible (and even spraying a bit of air freshener on himself), before getting dressed in a loose shirt and pants. He looked over at his alarm clock and nearly had a heart attack. He was streaming for four hours?! His sister was almost certainly home by now, he just prayed she didn't hear anything. After hiding his candies with his dildo and taking another moment to calm himself, he opened his door and stepped out of his room. It smelled quite nice compared to the current muskiness of his room, and a look into the kitchen revealed a pizza in the oven. Yep, she was definitely home.

He knocked on her door, and a few seconds later she opened it, staring up at him. "Uh, hey Sierra. I didn't notice you were home." He held his hands in front of himself, hoping she wouldn't notice his tail. "There you are, X. Were you in your room this whole time?" She crossed her arms and raised an eyebrow, her permanent glower making him a bit nervous despite having lived with it most of his life. Even though she was shorter and younger than him, anyone could see that she was much stronger. He could only nod in response, feeling a bit ashamed for multiple reasons. "Alright. Well, the pizza should be done any minute now, why don't we eat on the couch together and watch some TV?" She asked. "Okay. I'll get the plates." He said quietly, turning away and nearly smacking her with his tail. Normally he could judge the length of his tail pretty well, but with the recent change he couldn't adjust so quickly. Neither of them said anything about it, but she certainly noticed the extra length.

She was getting more suspicious but bit her tongue, something he was struggling to not do literally. It didn't take him long to prepare, only getting two plates out and pouring some water for both of them. Soon, both of them were sat down nice and comfy on the couch with their food, or at least they were trying to be. The two of them were quiet for a bit, the gabite saying nothing while the flygon was only trying to eat his food without revealing his tongue, or accidentally biting it. The show playing in the background didn't make it much better. Something about his pizza tasted off, not like it was a bad flavour but he just wasn't tasting it as much. He passed it off as something caused by his stress. He had to swallow his saliva often, much more so than he'd normally need to. Eventually she broke the silence. "You have any luck with your money situation yet, X?" She asked nonchalantly, looking towards him. He nearly choked on his food, managing to get it down without letting his tongue flop out either. "U-uh.. yeah, I have something. I-it shouldn't take too long for me to get what I need." He stammered, looking a bit away from her so she wouldn't see how large his tongue had become. "D'you need any help with it? I don't have much work the next few days." She asked, taking another bite of her pizza. "N-no! I mean, no. I can handle it myself, thanks." He replied, his cheeks turning red. He was sure that she heard him moaning, but hopefully she didn't hear too much.

There was some more silence, the two of them finishing their food before she talked again. "Hold on a second, X. I think you have something on your tongue.. Let me see for a second." His eyes widened. Did she know about his tongue? He did his best not to panic. "N-no? I'll just go check in the mirror." He stood up, nearly smacking her in the face with his tail again before running into the bathroom, locking the door behind him. A quick look showed that there was nothing on his tongue, meaning she was definitely suspicious. He didn't even think that she might've actually seen anything, which was for the best- he had enough stress already. He stepped back into the hall, almost bumping right into Sierra who was standing there with crossed arms and her usual glare. "Excuse m-me, Sierra. I think I need to lie down, I'm uh.. not feeling great." He lied. He looked a bit lower than he intended, staring right at her ample cleavage. He averted his gaze with bright-red cheeks, trying to hide his shock as he felt his member starting to slide from hiding right into his pants. "..Sure. I'll pick up some medicine tomorrow." She rolled her eyes, stepping aside to let him by. He took a step and gasped, nearly moaning. The sudden rush of sensation he got from his incredibly sensitive shaft brushing against the inside of his pants made his legs wobble, but he got to his room as quick as he could before shutting the door. Did the candies really jack his libido up that much? Even while they were eating he had to forcibly suppress his thoughts like that, and seeing her tits smushed together just ruined him.. he was already dribbling precum into his pants, making a small stain. It certainly didn't help that he'd already thought about depraved things with his sister, and maybe touched himself to those thoughts.

He practically tore his clothing off and laid back on his bed, letting his tail flop down with a heavy thud. With a long sigh he let some of his tongue out, about a foot or so rolling from his mouth and coating his chest in spit. It seemed that it calmed down since the initial transformation, and though it wasn't any smaller it wouldn't all come out at once, not by accident at least. With one hand he gently rubbed the top of that, making him shiver. It felt just as good as earlier. His other hand went to his groin, giving his hefty balls a squeeze. He hesitantly brushed a finger against his dick and couldn't restrain himself from letting out a shaky moan, trying to be as quiet as possible. He started to play with his cock again, squeezing it lightly, but after a minute even that was too much. He groaned as he thought about what he'd become, even if it was only supposed to be temporary.. he couldn't touch his dick for long, but if he took time to let it rest then he wouldn't be able to reach a climax at all. He was partially disgusted and partially pleased at what happened to his tongue, as its added sensitivity let him play with it so he could get himself right to the edge before trying to cum quickly with his dick. With another girly moan he started to stroke his tongue, resting his head back.

Meanwhile, Sierra was in her own room. His moans were too quiet for him to hear at the moment, but she had a good idea of what he was doing. She was in her own bed, stripped down to her panties for the sake of coziness. She was scrolling through her phone before she got a seemingly panicked message from a friend of hers, opening it up, and chuckling to herself. The message contained, amongst plenty of keymashing, a link to a recently uploaded video to a site she'd heard of. Apparently, said website was great for people who loved transformation. Not really her thing, but the thumbnail and info in the text had her quite curious. Her friend had told her that her brother streamed himself on a transformation website, and that she "had to see it". She was hesitant, after all he was her brother, and those things were his own business.. but she was curious. Just what did he do? She already suspected something was up with his tongue and tail, but she didn't know if there was anything else.

She made sure the volume was on low, opening it up and laughing a bit at what she first saw. The video was four hours long, containing every second of his stream from start to end.. did he even know he was recorded? Probably not, by how he acted. She wasn't planning on watching the whole thing, just skipping to some key moments. She was really more curious than anything as the video started, watching him strip off his clothes. It didn't phase her too much, she'd seen him walking around in nothing but underwear before, and both of them had seen eachother naked when they were kids. She watched closely, laughing a bit from his shock at the influx of viewers. She got comfy, listening to the bit about the candies with interest.. before skipping ahead. Fortunately for her, whoever uploaded it was kind enough to provide time marks for each transformation. She skipped to the first, getting an eyeful of the flygon stroking his shaft. Wow, it's.. smaller than I expected. She thought.

Her cheeks turned red the more she saw and listened to, his moans admittedly sounded quite cute. She always enjoyed seeing people so submissive and horny, and he was exceptionally lusty. She felt a bit warm watching it, sliding a hand between her legs. "Touching yourself while thinking about your sibling, huh..?" She thought out loud, but she wasn't certain if she was talking about herself or Xavier. Though she kept her claws filed down to avoid any unfortunate accidents, it wasn't exactly comfortable to shove them inside herself. She preferred humping against a pillow, or more simply, using her vibrating wand. She put her phone down and pulled her underwear off, picking up her vibrator from underneath her bed. She didn't pay any attention to the actual video now, just listening to the sounds of the flygon moaning as she played with herself.

Minutes passed, both of the siblings masturbating and not hearing eachother's moaning over their own. She skipped a while ahead in the video, right to the last transformation. She saw more than enough, watching his tongue grow so incredibly long. She'd never consider letting him fuck her, she wasn't that kinky, but that tongue of his was certainly tempting her. It didn't take her much longer to finish, groaning quietly as she soaked her sheets, legs trembling. With a long sigh she turned the vibrator off, setting it aside and turning off her phone. She knew that Xavier really wanted to work on his game and wouldn't accept money from her, but perhaps she could help him get his own..? Either way she wouldn't bother him about it tonight, especially once she heard him moaning still through the wall. After getting into her pajamas she got cozy, putting on some music so she wouldn't have to listen to him jerk off all night.

Back in Xavier's room, he was having some trouble. It certainly felt great, by Arceus it felt great, but he couldn't cum without direct stimulation. He couldn't stroke his cock for more than a few seconds either before the sensitivity got to be too much, and he had to let go. He was quite worried, hoping it would revert back with the other changes, but right now he couldn't stop. He squirmed on his bed, doing his very best to finish. He didn't know how long it was before he finally got himself to cum, his crotch a mess of pre, eventually managing to get over the edge, cumming just as hard as earlier. He arched his back, cumming all over his body and face, some even splatting against his pillow. He made a sound almost like a whimper as he pulled his tongue back in, getting some of his cum on it just like before. It seemed that he could taste it just fine, making him sputter and wipe some of it before he pulled his tongue all the way back in. Maybe there truly was something wrong with the pizza, but Sierra didn't seem to mind. Maybe something really was wrong with his tongue.. He used some tissues to clean himself off, getting right into bed and trying to sleep before he got hard again. He knew that if he started fapping again, he likely wouldn't get any sleep.

~

The next morning, Xavier got up from his bed and yawned. He was momentarily surprised when a few feet of tongue rolled out, before he remembered what actually happened yesterday and slurped his tongue back up. He managed to get dressed without any "interruptions", stepping outside and finding a sticky note on Sierra's door. "Gone shopping, be back in the afternoon.. Don't touch my food." He read out loud, and gulped. He knew that he wouldn't be able to resist streaming if he was really alone, both for the money and in the hope that he'd get something that would let him cum.. but deep down, he knew it really turned him on. He quickly made himself some breakfast first, squirming a bit in his seat as he felt his cock start to push from its slit. He microwaved some pizza, but just like last night there wasn't much taste to it, almost muted. He tensed up when it slid against the inside of his pants, one hand gripping tightly to the edge of the table while the other tried to peel away his pants. His efforts only made it worse, and he became fully erect near-immediately, precum staining his clothing. He couldn't finish like this, he had to take care of it right away. He pushed his food away, standing up and almost literally tearing his pants off, freeing his shaft and letting it throb in the air. Precum drooled from his tip onto the floor, and before he could make too much of a mess he tried running to his room, being careful to touch his dick as little as possible.

Before that though, he stopped in front of Sierra's room. He knew that she definitely knew something about his stream, but he didn't know how much. He didn't expect to be able to find anything as he peeked into her room, maybe only see her hiding home to try to catch him, but he was relieved to find that she wasn't there. He didn't want to rummage through her stuff, he wasn't that far gone, but as he started to close the door he noticed something. On her bedside table was her vibrator, not hidden at all, just sitting there in the open. He tried to push away the thoughts of taking it, but that only made them stronger. A vibrator would certainly make it easier to get off, and the audience would surely enjoy it too.. He ran in, grabbed the vibrator and ran out, shutting the door behind him before ducking into his own room. He'd return it before she got back home, it was only eleven in the morning so he had a while, and he'd make sure he put it back exactly as he found it.

He set up his streaming equipment again, keeping the vibrato aside for now, only slightly hesitant to bring out the candies. No one would pay attention without them, but if he kept eating them who knows how far the donors would make him go. He shivered, stripping down and making sure he was ready in his chair this time before starting. Just like before people joined near-instantly, even more so than before. He gulped, but did his best to act normal. "Hello again! I'm back with more transformation candies.." He turned one of the jars towards the camera. "For those who didn't see yesterday's stream, you can pay to have me eat any one of these candies of your choice, or pay extra to have me eat multiple of one type! The list of them is in the description." He gave his best smile, sliding his chair back a bit and giving his dick a soft squeeze. "Until I get a candy I'll just be playing with myself. I hope you enjoy..!" He huffed, carefully stroking his length, trying not to go so slow that it wouldn't give him any pleasure but not so fast that it would overwhelm him.

It didn't take much time at all before the first candy donation came in, the flygon stopping his masturbation with pre leaking down his dick. This time he had to eat one of the sperm-growing candies. He wasn't quite sure just what it'd do to him, but he was still a bit concerned about the side effects. He unwrapped the candy, staring at it for a moment before putting it in his mouth. His suspicions were confirmed, the formerly sweet and fruity candy now having a more bitter taste. It didn't seem like they each made his taste duller though, it was only after he had the four tongue candies.. He made a mental note to not eat multiple at the same time again. He felt a slight heaviness in his balls as if they were full, but something felt off. He didn't feel any fuller, but he could tell that something changed, especially once he rubbed his dick again. It didn't change by too much, but it was noticeably more sensitive than before.

He figured now was a good time as any to start using the vibrating wand, pulling it in frame. "I uh, got a new toy to use now. It should make things a bit more enjoyable." He huffed, hoping he didn't sound too unenthusiastic. He turned it on, jumping a bit in surprise from how strong its vibration was. How did I never hear her use this? He mumbled to himself. He nervously lowered it between his legs, pressing it against his shaft and letting out a loud moan. It felt great, and he didn't have to worry about the friction from stroking- not that he didn't have to worry about how sensitive he was now, though. He could already feel that uncomfortable sensation slowly building. "F-fuck.." He groaned, small donations coming quite frequently.

There were two chimes at once, and until he checked the screen he thought it was a bug. Two people donated candies back to back, a cock grower and one that apparently made him sweatier. He wasn't too confident in the so-called "sweat grower", but he didn't really have a choice at this point. He could at least eat them one at a time, and it was hard for him to hide his excitement about finally making his cock bigger. He would never tell anyone, but the few times he got close to losing his virginity he was laughed at for how small it was. He quickly ate the first candy, not even caring about the off taste of it. He held the vibrator aside, looking down at his dick as it throbbed.. and nothing happened. He frowned, waiting several seconds before giving it a poke, and in a single moment it grew a few inches longer, and a bit thicker. Not quite twice as long, but close enough for him. Before he could reach for the second candy a shudder went through his body, ending in his cock. A thick rope of precum splattered on his desk, almost getting on his keyboard. "A-aah.." He moaned, watching as his dick mutated from its usual smooth and tapered shape, the tip becoming blunter and gaining a sort of small barbed crown, and small little nubs growing all over his length. He couldn't resist giving it a squeeze, causing him to moan out and let a few inches of his tongue roll out of his mouth, precum rolling over his fingers. He gave his length a hard squeeze from base to tip, loving this change far more than the others despite the mildly-worrying shift in shape.

A few donations reminded him about the second transformative, and he reluctantly let go of his cock to get the candy. This one would be harder to hide, he'd have to clean himself better (even though he already showered daily), and be more careful when it was warm until the transformation wore off. Still, he held the vibrator against himself as he ate this candy, trying to enjoy its taste and the sensations it brought him. His pleasure kept rising, his crotch feeling incredibly warm, getting warmer and warmer.. and not cooling down this time, not uncomfortable but noticeably different. His cheeks turned red as he looked down, groaning softly. There was sweat dripping down his balls and around his slit, and he could swear there was steam coming off of him. "Uh.. y-you guys seeing this?" He reached up to adjust his camera, zooming it in on his crotch. His viewers got a good look at his glistening, sweaty, scaly balls and slit, and the steam coming from them, something they very much seemed to enjoy in the chat.

He gave his shaft a little rub, biting his lip. He returned the camera to normal, pressing the vibrator against himself again. A glance at the chat showed that people wanted to see his tongue again, and honestly, he did too. He slowly let it slide from his mouth, shyly looking away from the camera as he slowly rubbed it with his free hand. Another candy came before long, this one being another for ball-growth. He didn't wait this time, wanting to get right back to playing with himself. He put it in his mouth before putting his hands back down, and after a bit of consideration pressed the vibrator right against his balls by the base of his cock. He leaned back in his chair, letting out another girly moan as his balls slowly swelled larger, not just filling out his tight sack now but stretching it. The sensation was somewhat uncomfortable until the growth stopped, and he had time to adjust to it. "T-they're a lot bigger now.." He gave his orbs a gentle squeeze, gasping softly. Though they couldn't quite be classified as huge, they were certainly bigger than a normal-sized flygon would have. "I think they're a b-bit more sensitive too, my penis certainly is.." He huffed. The time he could touch his member was getting shorter, and he estimated that right now he'd be able to last for about thirty seconds before he'd need to take a break, and that's without going too fast. He could last longer with the stolen vibrator, but he could tell that even with that he was losing time, occasionally having to turn it off so he could recover. It soon became too much for him, and with a loud moan he came again. There was certainly more cum than before, but it felt like it was more difficult for him to get it out. It only took a look to reveal why, his seed being much thicker and gunkier than before, less runny and more sticking in globs. At least that explained what the sperm grower did. After he finished, he started thinking about how every time he came it was harder to finish- not only more difficult to get to the edge, but harder to actually cum too. He wasn't sure if it was because of the candies directly, or their effects combined with him masturbating so much. He didn't want to find out, but as he looked down at his messy scales he felt his cheeks turning more red, his length still rock hard.

He didn't have much time to think, getting another big donation for multiple candies. Fortunately it was only two this time, and he was curious about the effects. He had to take two of the prostate-growing candies, and even though he could already tell it'd make anal orgasms easier- something he'd only achieved once before- he was also worried about what else it might do to him. Still, he took two of the candies out, opening the first one and eating it. Just like with the tongue candies he felt nauseous once the changes started, though it wasn't quite as bad. He put a hand on his belly, not really caring that he was rubbing some of his cum around, feeling a strange sensation deep in his gut. The feeling moved lower, and he started to feel incredibly warm deep in his rump, instinctively thwacking his tail against the floor. Soon the feeling faded, and it only took a second for him to notice a difference. Even without it being touched at the moment, his dick was leaking more precum than before, no longer dripping but instead coming in a constant but slow stream. It was making a mess, but he could just shower afterwards. He took a minute to recover, lightly pressing the vibrator against himself, before he ate the second. He shuddered, making him nauseous again just like the first, but he at least knew it'd be temporary. It felt the same as the first, but now there was more precum, making a slowly growing puddle on his crotch.

He knew what he had to do now, putting the vibrator on his desk for the time being and picking up his dildo from yesterday. He looked towards his bottle of lube, then the camera, then his messy belly.. He had a better idea. He gathered some of his pre and cum up with his free hand, rubbing it all over the dildo and making it nice and slippery. His watchers seemed to like that, and fortunately for him he was too distracted to notice his viewer count reaching five digits. He kept two hands on the base of the knotted dildo now, not even prepping with his fingers and starting to force the silicone toy right into himself. He bit his lip and groaned, shutting his eyes tight as he tried to relax. He gasped when it started to slip deeper, and it only made it a few inches before he could physically feel it bumping against his enlarged prostate, causing him to make an unusual squeak that had him embarrassed to hell. His shaft jumped, a spurt of precum splattering across his scales. "A-Arceus, this feels amazing.." He grunted, tilting the toy so it'd press against his prostate harder. With how good it felt he couldn't find himself worrying about it, slowly thrusting the dildo into him and making more pre come out with every push. He wasn't even thinking about his sister returning, purely enjoying the moment.

It didn't take too long for him to get to the edge, his cock throbbing and twitching constantly, but like before he couldn't get off, being even worse now. Before he could get the vibrator again he received another donation, for five more prostate candies. It was a lot of money, but it'd also mean a lot of growth. He gulped nervously, pulling the five little candies out of the nearly-empty jar. He could tell with the last two that the nausea wasn't because he ate multiple at once, so he may as well save time by eating them all. Before he could realize how bad of an idea that was he had all five of the prostate-growing candies in his mouth, pulling the dildo from his rear for now. He was ready for the nausea this time, not that that made it feel any more pleasant, but he expected it at least. Another shiver went through his body, focusing on his prostate once more. He nearly bit his tongue as he felt his prostate grow larger right away, almost tripling in size even after its recent change, stretching his rump out more than anything else did, and a glob of precum smacked him in the face. There was another concerning and very uncomfortable feeling, like pins and needles inside his ass, but it stopped a moment later. That sensation had only happened with his tongue before.. He had other things to worry about though, like just how good it'd feel now if someone fucked him. He pressed lightly against his crotch from the outside and he could feel the bulge of his massive prostate, making him shiver. The precum was making an absolute mess, his stomach, crotch, and thighs coated in it and his chair slowly getting ruined. He could fix that later, he'd just need more tissues and air freshener..

He didn't wait any longer before pushing his dildo back into his tailhole, and he found out that he was absolutely right. After pushing by his prostate, making it shift entirely and quite literally forcing precum to gush from his tip, he briefly went cross-eyed and trembled before regaining his composure. "K-keep them coming, guysss..!" He trailed off as he moved the toy inside him, pushing it deeper still. The knot pressed against his rim, but he was absolutely determined to make it fit this time. He put both hands on the base, spreading his legs and pushing hard, slowly stretching his poor ass around the knot before it popped in. It wasn't much, the knot not even reaching his enlarged prostate, but the added depth did plenty- not to mention the slight pride he felt from finally being able to take the knot. "G-gosh.. I'll um, keep that there for now.." He rubbed the base, making the dildo move around inside him and making him shudder.

He only looked at the screen again once he got another candy donation, this one for more sperm growth. He felt some of his worry return. If his cum became too thick, would he even be able to get it out..? He stopped worrying once he realized he already put the candy in his mouth, a few seconds ago judging by the mild nausea that was already hitting him. He didn't know what was causing the occasional nausea at this point, as the first sperm-grower didn't make him feel it. The heat focused on his balls, and just like the first time he had that strange not-quite-full sensation. But now it went a step further, and he swore there was a slight squirming sensation in his balls. He couldn't tell a difference when he rubbed his sack though, and he knew the only way he could truly tell: He'd need to get off again.

He got a new idea, spreading his legs more with one over the side of the chair, pressing the vibrator against the base of the toy inside himself and making the whole thing shake lightly. It was enough though, the pleasure shooting through his body as the dildo vibrated against his prostate, more and more precum leaking out. It felt amazing, and he found himself getting to the edge in no time. Poor, poor Xavier was so lost in the moment that he didn't hear his sister arriving home again, nor did he hear her checking her room and finding that her vibrator was missing. However, he did notice her almost literally busting his door down, making it slam against the wall as he nearly fell out of his chair. At first it was hard to tell with her usual glower, but he could see some genuine anger, or at least disappointment in her eyes. He dropped her wand out of shock, vibrating loosely on the floor. "I-it's not what it looks like!" He shouted, hugging onto his tail in a poor attempt to hide his body. The stream chat was going nuts. "Really? Cause it looks like you stole your damn sister's vibrator!" She shouted back, stepping forwards. The viewers couldn't see her yet but they could hear every detail, and the little reveal of them being siblings only attracted more.

"I can't believe you'd really go this far just so you could make your game.. I mean, look at you, even your tail is bigger!" She stepped into frame, giving his tail a gentle thwack. He gasped from the somehow pleasant sensation, his tail slipping from his grasp and thudding against the floor, letting her see everything else- or at least what was on the outside. She scoffed, looking up and down at him. He hid his face in his hands, his cheeks burning up in embarrassment, but he was still leaking precum onto his belly. She gave him a somewhat disgusted look. "For Arceus' sake, Xavier.. you're seriously putting yourself through all these changes for some money? You look like a slut!" She sighed, rubbing her forehead. He only looked away in silent shame. "I mean look at this.. that's not what a dick is supposed to look like!" To his surprise, the watchers' surprise, and even a bit of her own surprise she grabbed his mutated dick, giving it a pull before letting go. "Ugh, it's so slimy..!" She muttered, wiping her hand off on her pants. The shock of that sudden, short pleasure caught him off guard, trembling for a second before he moaned quietly and a few inches of tongue slipped out. She narrowed her eyes. "Seriously? I hardly touched you, and.. what is that?" She grabbed his tongue, making him yelp as she suddenly pulled more of it out until it was at its full length. He couldn't hold himself back, letting out a louder, shakier moan. Her eyes widened now, letting go of his tongue. "I'm s-sorry..! The c-candies make me really sensitive, I can't help myself.." He whined. Her touches felt much better than his own, and he couldn't explain why but her words were only turning him on more.

"Listen, Xavier. I saw your stream last night. I didn't do anything because I thought it might be a one time thing, that you'd change your mind.." She partially lied. "But look at you, you're showing yourself off to thousands of people as you ruin yourself, like some kind of sick pervert. Just look at this, your balls are huge, and fuckin' steaming!" She lightly smacked his sack, and he groaned again. It hurt a bit, but it brought much greater pleasure with it. "You smell like you went a hundred laps in the gym, ugh.." She grunted, and all he could do was slowly draw his tongue back into his mouth. She wasn't wrong, since even though he showered yesterday morning he hadn't cleaned properly since yesterday's stream, and he had the candy that made his crotch quite a bit muskier. She looked a bit further down, glancing at the dildo stuffed in his ass then up at him. He shrank back in fear. "Really, now? Fucking yourself while people watch.." She grabbed the base of the dildo and his eyes widened. Fuck. He was right on the edge, and he couldn't stop her from doing anything as she swiftly pulled the whole thing out of him, knot and all. That last bit of movement against his prostate was all he needed. He cried out in joy, his tongue flopping back out and his hands gripping tight to the sides of his chair as he came from his sister's poking. He came so hard it nearly hurt, his urethra getting stretched as his extra-thick semen was pumped out.. right onto Sierra's face, all over her tough scales. He didn't realize just what he'd done until he finished, his heart sinking and his eyes widening. His cum barely dripped down, at least not until she wiped it away from her eyes. She glared down at him, briefly looking towards his stream. Even now, plenty of donations were coming through. He was making more than a bit, but he wasn't halfway quite yet. She threw his dildo aside, staring at him with a rather disdainful stare before grabbing her vibrator and turning away. "We'll talk about this later." She stormed out, slamming his door shut. As horny as he still was, after that he couldn't bring himself to continue. People were laughing in the chat, but plenty of them were just as turned by it as he was. "I'll.. see you guys later." He turned off the stream, closing his computer.

That really just happened, he couldn't undo it. What was he going to say? Was she going to tell others? Ignoring his fantasies, he really did care about her, but after that he didn't know if she would still care about him. By the time he got up he could hear the shower running, which only made sense. He doubted that Sierra would actually want to stay all messy, especially with her brother's cum. He looked at some of it on his belly, and upon closer inspection he could actually see the sperm squirming around in it. "Guess that explains the sperm growers.." He mumbled. His cock occasionally dripped precum even as it went soft, receding back into his slit. He couldn't do much at this point but wait, hiding all of his stuff as well as he could and getting dressed. He sat in the living room, only listening as the gabite finished showering. She entered the room in a new set of clothing, something more comfortable than what she came home in. He looked back at her with a frown, and she sighed. "Xavier.. Do you really want the money that badly?" She leaned against the couch behind him, and he gave her a little nod. "I-it's really important to me, yeah.. I know there are other ways to get it, b-but this is quick and the changes are only temporary." He mumbled, nervously looking up at her. She glared back, but she didn't look so angry anymore. She shook her head, gently putting a hand on his shoulder. "I won't stop you. Just don't go overboard, okay..?" She paused. "And stay the hell out of my room. I'm going to need to heavily sanitize my vibrator." She rolled her eyes. "..Take a shower, too. You smell." She gave his cheek a little flick, making him flinch, before she walked back into her own room and closed the door. "O-okay." He huffed, rubbing his cheek. At least things could return to normal.. hopefully.

He stepped into the bathroom, making sure the door was locked before dressing down and stepping in the shower. Sierra listened from her room as the flygon started showering, quietly getting up from her bed. She stepped into his room, trying not to breathe in too much of the musky smell that filled the air. She didn't feel too bad, after all she wasn't trying to steal anything for her own pleasure, just to make sure about something. The first place she looked was underneath his bed, and there was exactly what she was looking for. As smart as he usually was, Xavier was quite awful at hiding things. She pulled out the cardboard box from underneath, and the eight jars inside. Some of them only had a few left, showing that he changed even more than she knew. She sighed, putting one of them down on the floor. She looked back into the box, raising an eyebrow. She could just pick out the shape of something underneath the bubblewrap, apparently undisturbed. She lifted the bubblewrap up, taking the paper out. It looked like a warning sheet of sorts, but she decided to take it so she could read it without getting caught. It seemed like he didn't know the paper was even there, after all.

She returned everything to the way it was, minus the paper, going back to her bedroom and closing the door, sitting on her bed as she opened up the paper. It was most certainly a warning sheet, nothing too detailed, more of a disclaimer than anything. It warned that each candy that was eaten would make your penis more sensitive, and each type had a chance of unique side effects that may occur, but it didn't say what those were. Worse than that, apparently if someone ate too many of any one type while still under its effects, it'd become permanent, with no known cure.. and if you ate more after that, it could get even worse, though all it said about that was "Do not eat more after permanency.", written in red ink. As far as she knew, he didn't know about what could happen, and despite her worries she planned to keep it that way. Even after what had already happened, she knew that Xavier was smart enough to not buy something that could genuinely harm him, even if these effects could change his life forever. He certainly seemed to enjoy the pleasure his changes bought, judging by how much he came on her earlier, and she didn't really mind helping him now that she was over the initial shock. Her cheeks turned a bit red, and she resisted the temptation to touch herself again- for now at least. That could wait until the night.

The rest of the evening was rather mundane, the two siblings having a short hug after the flygon finished showering, both of them doing their own things until they shared a simple dinner, Xavier retreating to his room afterwards and Sierra staying out of hers to watch TV. Neither of them spoke a word about anything that happened in the past two days, but managed to keep it from being too awkward. The moment he was naked he gave in to his temptations, pulling his dildo out again and laying on his bed with his ass up and tail raised, face in a pillow. He knew he wouldn't stop until he came, no matter how long it took, pushing his toy right into his ass before he was even hard, immediately grinding against his prostate and moaning against his bed. It was going to be a long night.

~

Xavier slowly woke up, feeling a bit more tired than normal. He sat up, rubbing his eyes and stretching again. He jumped a bit as pleasure suddenly shot through his body, more specifically his ass. He reached down, and with a shaky moan he pulled his knotted toy out of himself, dripping with lube. It seems like he left it in himself overnight, not that he really minded. He felt just a bit sore in the behind, having spent quite a while pounding himself last night, having loosened himself to the point where he could repeatedly push the knot in and out without much effort. He didn't even manage to cum, having passed out from exhaustion, but he made a huge mess, most of said mess actually having been his precum. He did his best to clean it up, especially around his crotch, but this morning he found something new. There was a sticky, whitish, and incredibly smelly substance around his slit, and a gentle spread revealed that there was more inside, both on his dick and the walls surrounding it. He gathered some up on a finger, bringing it up to his face and giving it a whiff. He recoiled slightly, wiping his hand off on a nearby piece of clothing. He definitely knew what it was now, and could only assume it was somehow caused by one of the candies. It was smegma, enough of it built up overnight to make it look like he hadn't cleaned in two weeks. That'd certainly be annoying to deal with..

He put on some underwear and stepped out of his room, trying to head right to the shower but getting blocked off by his sister. "Uh.. what's up?" He asked nervously. She stepped a bit closer to him, he stepped back. "I know you'll stream again whether I'm here or not, I can tell just how badly you want to do it.." She sighed, but there was an almost teasing undertone that he barely noticed. "When you do it.. leave your door open. I'll try to ignore anything I see, or hear. I just don't want you to hotbox your room with musk again, I'll keep a few windows open." She grunted. It was true that keeping his door open would make his room less musky, but it was also a test of sorts to see just how willing he was to continue. "O-okay, sis." He nodded, and she stepped aside. He rushed into the bathroom before she could see his member starting to tent out his underwear, but once he closed the door she could hear him moan. This will be fun.. She thought.

He stepped into the shower fully erect, staring down at his dirty, musky, sweaty cock with his heart beating quickly. Little white flecks spotted most of his length, with more near the base. He didn't even turn on the shower water yet, reaching a shaky hand down and giving his slimy cock a squeeze. He gave it a stroke from base to tip, gathering up the buildup on his hand, already leaking copious amounts of precum onto the floor. He gave it another sniff, the smell much stronger than before. He shuddered, his face flushing red. He didn't know what came over him as he licked it off of his hand and swallowed it without hesitating. It had a very strong, somewhat salty taste, mostly like his precum and slitfluid. It doesn't taste as bad as I thought.. He thought to himself. But it's still gross, so why am I doing this..? With a loud huff he started to let more and more of his long tongue out, grabbing onto it with his clean hand and trembling. It was just long enough to reach past his crotch, and after a deep breath he dragged it against his dirty cock. It felt wonderful, and though he wasn't a fan of the taste, the idea of what he was doing more than made up for it. He gave himself another 'lick', and another, and another, even after his shaft was cleaned. He knew that wasn't all though, bringing his tongue to the base of the dick and slowly stuffing it right into his smelly slit. He never really toyed with his slit much, but fortunately his tongue was nice and soft and slippery, making it easy to slide in. The taste there was much stronger, making him gag before he regained composure and continued "cleaning" himself, occasionally pulling his tongue back into his mouth to swallow his buildup.

Apparently he lost track of time, hearing a knock at the bathroom door just as he finished licking out his slit. "What's taking you so long in there? I need to shower too, you know." He heard his sister speak. He slurped his tongue back up, a bit shocked. How long have I been in here? He huffed. Though his licking at least made his slit cleaner, nowhere else on his body was any better, and he certainly didn't smell any better than when he started. But he couldn't just deny her, putting a towel on and splashing some water on his face from the sink so it at least looked like he did something. She had a good sense of smell though, it probably wouldn't fool her. He tried to hold his towel in a way that hid his bulge, but she glared at him as she stepped by into the bathroom, locking the door.

"Better start before it's too late.." He mumbled to himself, going to his own room and setting up his streaming equipment, his hardon still pulsing with lust. He sat in his chair, looking towards the wide open door. Once she was out of the bathroom, Sierra would be able to see, hear, and even smell everything that he was doing.. it made him nervous, but it wasn't as bad as having to eat the candies in the first place- which he didn't consider all that bad, really. He started up his stream, giving the camera a smile as people immediately joined. "Hello again! S-sorry about yesterday, but uh.. things have been resolved! I'll just be doing a regular stream, same rules as normal." He sat back in his chair, revealing his steaming crotch as he spread his legs, a hand going under his tail to gently finger his tailhole. At the moment it was easiest to get pleasure by stimulating his prostate, and with how large it was he didn't have to go too deep.

He only made it a few seconds before someone donated for him to take a candy, or rather two people did. One for tail-growth, and one for anus-growth. He was a bit suspicious of the second one, but the other strange sounding candies turned out fine, relatively speaking. He ate the tail-grower first, hugging onto his thick tail as it started to grow. He shivered and moaned, giving his tail a lick as it became almost a foot longer, seemingly more sensitive as well- not as nearly as much as his tongue or prostate, but noticeable nonetheless. He slowly rubbed it with both hands, huffing softly. The small pleasure it gave was a nice relief from the near-overwhelming sensations that some other parts had, but he had other things to take care of. He ate the anal-growth candy right away, starting to finger himself again and milking more precum from his cock. Some of his tongue hanged from his mouth as he fingered himself, a bit of drool running down his chin without him even realizing it. He pushed a second finger in along with the first, and then a third.. Wait, a third? That didn't sound right. He had all three of his fingers, excluding his thumb, stuffed inside his rump. That explained what the anal-growth candy did at least. He didn't necessarily feel any looser, but he was certainly stretchier. He pushed his fingers as deep as they'd go, moaning louder and not even caring about the pre that splattered onto his face, or that the door was wide open.

This time he heard Sierra getting out of the shower, but he didn't stop. She wanted him to keep his door open after all, so if she wanted him to stop she'd have to say so. That's what he was thinking at least, but when she stepped into his doorway wearing absolutely nothing, he was shocked enough to stop, his fingers still buried deep in himself and precum drooling onto his scales. She didn't look upset at him, one hand on her hip and the other hiding something behind her back. "W-what is it, Sierra..?" He asked nervously, slowly letting his tail down underneath his desk. "Don't stop because of me, I'm just watching.." She chuckled, leaning against the doorframe and staring right at him. She could certainly see everything, his cheeks turning red as he turned back towards the camera. "O-okay.."

He started slowly fingering himself again, the other hand lightly rubbing his shaft with a single finger, even then having to stop touching it quite often. He looked towards the chat for a brief moment, catching a glimpse of "Sis?" being spammed over and over by more than a few people. He looked towards her again but didn't slow down, jumping a little bit when the 'ding' of another candy donation came through. This one was for another anal-growth candy, and he nervously looked back and forth between the gabite and the jar as he took out another of the transformatives. He felt the familiar nausea hit him, but as uncomfortable as it was he was mostly used to it- Sierra still managed to notice his subtle grimace, his tail thumping against the floor. He could feel his tailhole getting looser, but something wasn't quite right. There was a strange aching feeling in his throat and urethra, as if they were getting stretched out by something penetrating them, but there was nothing inside. The sensation faded, but he could already tell what changed.

He carefully poked a finger against his urethra, having more than enough lubricant with the amount of pre coming out, pushing his finger an inch in. He stretched just fine, moaning loudly from the unusual sensation. Sierra only raised an eyebrow, watching every move and taking a quiet step closer. He couldn't push his finger all the way in, not because of the stretchiness, but because the sensitivity inside was far too great for him to be able to bear it for more than a second. "That's a new one." The gabite laughed quietly right next to him, making him jump. Of course, the stream chat had once again started spamming "SIS". She leaned in closer, bringing her chest up right next to his head, but was still hiding something behind her back. "Don't stop on my account, X." She grinned, knowing the effect she was having on him. She wasn't quite so interested in fucking him as he was fucking her, but that didn't mean she couldn't tease him into oblivion. He nodded, resisting the urge to bury his face in her chest as he kept fingering himself.

She bent down a bit, whispering into his ear quiet enough that the stream viewers couldn't hear her. "Xavier.. I know how much trouble you've had finishing recently, with all your changes." He gulped, not quite sure where she was going with this. "I could help you out, you know. Satisfy your sexual needs until the transformations wear off, or at least you get a girlfriend who can do it for you." He looked up at her, unsure if she was being serious or not, but instead of looking angry or mean (beyond her usual glower of course), she just smiled at him. "I even know how we can make you reach your goal today, if you want to..~" He shivered after hearing that. He was a bit over halfway his goal, but still had a lot left to go. As much as he wanted to keep going longer, it'd also be great to have it done and over with. "W-what's the catch..?" He mumbled. She grinned, showing off her sharp teeth. "To get more than the bare minimum, you'll have to do everything I ask you to. In public we'd still just be brother and sister, but behind closed doors you'll be my pet~" He felt like he was going to bust just from hearing that, but he knew it was still a long while before he'd actually cum. He couldn't think of any words to respond to that, so he only gave her a small nod.

She suddenly put her hidden hand on his shoulder, covered in slick, black rubber, looking towards the camera. "Alright, chumps. From now on, any candies donated will be given to him by me.. so keep em coming." She chuckled, reaching her hand down between his legs, giving his dick a squeeze and suddenly stroking it hard and fast for a few seconds. The sensation almost immediately overwhelmed him and he gasped out, his free hand gripping tightly to the desk while the other's fingers tensed up inside his ass. She let go of him, his cock throbbing madly. "This thing smells.. did you even shower?" She raised an eyebrow at him, and after recovering he replied. "I-I got distracted.." She rolled her eyes.

It wasn't long before they received another three different candies- maybe it was lag on the stream's end, but neither of the siblings were complaining. This time it was for another cock-grower, tongue-grower, and prostate-grower. "Get the candies out, Xavier.. I'll take care of the rest." She grinned, and he nodded back. He pulled his hand from his rear, taking the three candies out and unwrapping them, setting them down on the desk. "Lean back, and keep your legs spread." She commanded him, and he eagerly obeyed, his cheeks bright red. First she wiped her gloved hand against his belly, making him huff as she covered her hand in gooey precum, then picking up the three candies. There were only three of the prostate-growing candies left counting this one, making her wonder if the worse effects the warning paper talked about had happened yet. "It doesn't matter how they get into you, right?" She asked him, but she already had her plan. He felt that he knew what it was, too. "I-I don't know.." He mumbled back. "Well I hope so, that's why I brought this glove." She huffed.

She didn't wait any longer, holding the candies in her fist as she pressed her fingers against his tailhole, two of them slipping in easily followed by a third, her thumb pressing against his rim. He could feel her claws inside him, lightly poking against his walls but nothing that was too uncomfortable. As much as he wanted to, and as stretchy as the candies made him, he wasn't sure if he could take her entire fist- he hadn't taken his own yet, and her hand was wider than his own. She seemed confident though, slowly sliding her thumb and other fingers in deeper until she managed to get her entire fist in, his rim clenching tightly around her wrist. Her hand pressed against his huge prostate and he moaned out, tongue rolling from his mouth again. Having someone else stimulate him felt so much better, not to mention it was someone he'd fantasized about often. Musky precum covered his belly, running down his scales and soaking the chair he was sitting on. "My my, I knew it'd be big but this is.. Excessive." She curled her fingers, forming her hand into a fist and grinding it back and forth against his prostate. He kept groaning, especially when she started moving her arm deeper. He was honestly surprised as he took her arm right up to the elbow at the end of her glove, his stomach bulging slightly. "H-holy shit.." He gasped, putting a hand on that bulge as she slowly moved it around.

She let those candies go deep inside his ass, pushing them as deep as she could before slowly pulling her arm out of him. His tailhole was left gaping slightly, something she took full advantage of by pushing two fingers from either hand into his rump, stretching him as wide as he'd go, making a nice gape. He groaned and trembled, resisting the urge to clench his legs around her. She looked towards the camera again as she stretched him and smiled. "I bet you all want to fuck this, huh? Feel his ass squeezing around your dick, making him cum hands free.." She teased both the audience and the flygon, who was blushing up a storm. As much as he was doing earlier, something about someone else showing him off made it all the more embarrassing.

Soon enough the candies took effect, and he felt the nausea come even stronger than before. It seemed like the effects were stronger like this, since his body couldn't break down the transformatives as well. He huffed as his tongue grew longer, sliding against his scales as it grew at least a foot longer and a bit thicker. Not only that, but he could feel his mouth filling up with more saliva, dripping down his chin. He made a whimper as she grabbed his tongue with her "clean" hand, giving it a little tug. "This thing is huge.. I wonder how it'd feel inside someone?" She thought out loud. Next his cock grew a few inches longer and a bit thicker, the barbs on the crown and the nubs on his length growing larger to match. It was something any flygon would be proud of, or at least they would be without the mutations in shape as well. Sierra gave it a little rub with her thumb, even that touch nearly being too much for him as he gasped out. "S-sis..!" He whined. He couldn't quite feel the next part except for a mild heat in his ass, but the splatter of precum on his chest was proof enough of his prostate growing.

"We'll stop the stream when he cums, so donate while you can!" She looked towards the camera as she not-so-gently pushed her fist into him again, teasing his newly-grown prostate. "I-it's too goood.." He moaned, clenching and relaxing around her fist while she toyed with him. They got a big donation next for four tail-growers, with a small note attached to it. She didn't quite understand why people were into such things, but she was going to follow the rules of his stream anyways. She didn't take her fist out of him, using her free hand to take the candies from the jar and unwrapping them. This time she didn't need to fist them into him or make him swallow them though, the donor had asked for something quite unusual- or at least it was unusual normally, it was almost mundane compared to everything else that happened.

He made a quiet yelp as she pressed the first against his cumslit, pushing it right in and forcing it deeper with her finger, his cock bulging out. He squirmed a bit as she slowly forced the candy deeper, squeezing his shaft from the outside and pushing the candy along until it vanished past the base. All of the precum that she temporarily blocked off spurted out at once, some of it shooting right past his head and splattering on the floor behind him, the rest hitting his face and tongue. "O-oh Arceus, that feels.. g-go a bit slower.." He asked quietly, looking up at her. She only shook her head. "We have to get them all in quickly if we want the effects to happen at once~" She picked up the remaining three candies this time, slowly massaging his prostate with the palm of her hand to help him relax as she pushed the transformatives right into his urethra one after the other, quickly forcing them down. "S-sierra, I can feel them inside me.." He groaned, his shaft throbbing with pent-up lust, the poor flygon having been stuck on the edge for a long while now but unable to release. He nearly blacked out from the mind-numbing sensations as his tail grew and grew, sliding along the floor and pushing up against the wall behind his desk. The whole thing became considerably thicker too, more than twice as long as it was normally and about twice as thick at the base. Not only that but the stiffness increased, not necessarily becoming harder for it to be moved but harder for him to move himself, unable to do more than make it wiggle a bit from side to side instead of curling around regularly. That wasn't the worst, or rather the best part of it though. It was incredibly sensitive now, about as sensitive as his tongue if not more so. Sierra whistled at the sight, brushing a hand against it and sending a shiver down his spine. "Don't think you'd be able to go anywhere without dragging this behind you.. Doubt you can even fly anymore." She chuckled, cupping her hand around his prostate and giving it a squeeze. He moaned weakly in response.

Those changes barely finished before there were another two candies, another for his cock and tongue. They were already quite far past the money goal but he didn't notice.. She did, but she was having too much fun seeing him all needy. Besides, it wouldn't hurt to have extra money. She didn't want to torture him though, pulling her fist from his loose rump and getting the next two candies. "I-I think I'm getting close.. I mean, to c-cumming.." He whispered up to her, his legs shaking with his hands on his chest. She didn't reply to that, instead taking the next two candies and quickly pushing them into him in one go, along with half of her arm. She went a bit past the elbow this time, making the bulge in his stomach grow further this time. She let go of the candies inside him, pulling her hand back so she could keep pushing against his abused prostate, the flow of precum never slowing down. As was quite common now, he felt the short nausea before the changes started. He watched as his member throbbed, growing a bit larger with each pulse. The barbs and nubs grew plenty larger, but near the base his cock swelled outwards, forming into a thick, extra-sensitive bulb. His cock couldn't hold its own weight anymore, slowly lowering down and resting on his belly, even that feeling making him whimper as the mess increased- which wasn't easy, since most of his front above the waist already had precum already over it. He gave her an embarrassed look as his tongue only grew more, about an inch of it resting on the floor now. "Pull your tongue up, pet. It'll get dirty." She huffed, and he did as she asked, slowly pulling up his hyper-sized tongue back into his mouth as everybody watched. All he could taste was his own salty precum, his saliva dripping down his face and chest. He could definitely tell he was making a lot more spit than before, and it wasn't just the size of his tongue that was making him drool.

They got the biggest donation yet, for six of the sweat inducings candies. He was nervous about just what it'd do to him, and she wouldn't admit it but she was a bit worried too- she wasn't the most eager about having to smell that, and only she knew that it'd likely last forever. She was curious to see just how sweaty he would get though, and eager to see just how needy he'd become. She took her hand out of him and grabbed the six candies from the jar, leaving it nearly empty. She tossed the wrappers aside, nearly punching his prostate as she crammed her fist into him again and let the candies go. She rubbed her dulled, gloved claws against his hyper-sized prostate, bringing him closer and closer to finishing while she watched his changes happen. His skin tingled around his crotch, becoming incredibly hot. His balls and slit became very sweaty, constantly dripping down his scales and soaking the chair underneath him, the steam thicker than as if he was boiling water. It was a dirty, musky smell, but he found himself leaning closer as he took deep sniffs of his own stench. Sierra huffed, leaning back a bit. It didn't smell as bad as she thought it would, but she wasn't quite as attracted to it as he was, watching as he rubbed his hand against his balls then pressed it against his nose, huffing the sweaty musk that was on his hand.

"Good flygon." She chuckled, her gloved hand getting plenty rough and abusing his oversensitive prostate, making him moan out while her other hand grabbed his tongue, squeezing and stroking it and making him shudder. She didn't mind the spit getting all over her hand, it wasn't the grossest thing she'd done today. She lifted one of her feet, pressing it on his tail and rubbing against it with that, gradually ruining poor Xavier's mind with the mind-breaking pleasure.

Soon he looked up at her, trying to speak with her playing with his tongue. "P-please, touch it.." He moaned, looking at his twitching dick, thick ropes of precum shooting from his tip with every throb. She rolled her eyes, letting go of his tongue. She hardly touched his member, giving it a light poke with a single finger, but that was all he needed. With a cry of ecstasy he nearly fell out of his chair, only kept in place by her hands and foot on him. To her surprise though, with how hard he came, his cum really didn't make it far- it weakly spurted onto his belly, though there was quite an impressive amount of it. It clung to his scales, too thick to even run down.

After that he was too exhausted to even move, letting his arms flop to his sides and letting his tongue roll out, his ass relaxing around his sister's fist. She pulled out of him, letting him rest and giving him a kiss on the cheek. "This will be the last stream for a while. We'll see you guys later." She winked at the camera, turning off the stream. "I'll be in my room if you need me, X.. and shower this time. You smell awful." She gave his head a pat, walking out and leaving him in his mess. He had trouble even thinking at the moment, staring at the ceiling and panting. He came much harder than before with her teasing, just now coming to a realization.. With all of the changes, he wouldn't be able to make himself cum, having to rely solely on her to get any relief. He wasn't complaining though, finding that his dick was still rock hard as he thought about her..

One year later..

Xavier stretched as he woke up, grumbling as he shoved his tail aside, having been hugging it the entire night. His blushed at the stench that permanently filled his room now, his mattress and blankets soaked with the ever-present sweat from his crotch, and the filthy smegma in around and his slit that he woke up with every morning. Worse than that was his precum, which never stopped flowing out now even when he was unaroused (which was admittedly quite rare nowadays), making his groin and legs sticky and musky. He wasn't even allowed in the shower xanymore for a few reasons- he could hardly fit in with his massive tail, the water overstimulated his sensitive parts far too much, and Sierra was worried that all of his precum would clog the drain. She still dealt with his stench, but often teased him about it. He at least cleaned what he could with towels.

He stood out of bed with his tail dragging behind him, yawning and stretching, accidentally letting his tongue out. It hung from his mouth, the end landing on the floor with a heavy thud despite him standing up. He winced, the unusual pleasure it brought already making him get hard. Most of his transformations had reverted to normal after a month or two, including his cock, his balls, how stretchy he was (though with how often he played with Sierra, that wasn't too noticeable), and how thick his cum was. He was a bit sad about his genitals shrinking back down, having been one of the reasons he ate the candies in the first place. The rest hadn't shrunk a bit, seemingly transformed permanently, while his tongue was always growing longer, about twice the length now since his last stream, his prostate was always getting bigger and more sensitive, and his junk was getting even sweatier and steamier. Fortunately it seemed to at least be a steady rate- he measured his tongue every week, and it grew the same small amount every time- but there seemed to be no end in sight either. His tongue was so huge that it filled his mouth all on its own, and even with the extra capacity it seemed to give him he couldn't hold it all in anymore, an inch always sticking past his lips in a sort of cute blep now. His crotch sweated plenty even when it was cold, and when it got hot it was practically raining off of him. It was arguably his favourite scent though, and he found himself going to his bed to pick up his blanket as he sniffed it. His prostate was another story, having grown large enough to constantly give his lower belly a slight distention, making it look like he gained some weight- which wasn't entirely wrong with how much some of his parts had grown. He hadn't really thought negatively about his changes in months, though his sister still teased him about it often, though he still found himself annoyed sometimes when he accidentally closed his tail in a door or even managed to trip on his tongue. He couldn't taste anything good, his tastebuds dulled so he could only taste rather bitter and musky things, such as his own precum or smegma, which he tasted quite often.

He found it difficult to sit in his chair anymore with how large his tail was, so he often stood up while at his desk. Yesterday he had finally managed to finish his game, although it wasn't quite what he originally planned. He managed to release it all finished with next to no bugs, but somewhere along the line he decided to make it into a rather graphic breeding game. It had been especially hard the past while, as in the past three months he hadn't been able to cum at all, no matter how hard he or his sister tried to get him off.

There was a knock at his door, but he already knew who it was. Knocking was more of a formality than a request for permission. Sierra stepped in, quite a bit taller than him after she'd evolved into a garchomp. As was usual around their home neither were dressed, Xavier because he couldn't put anything on over his oversensitive dick, and anything would get ruined by sweat and pre anyways, while Sierra just didn't want to get so messy. He perked up, cheeks turning red as he stared up at her. "Still can't cum, pet? Thought so." She stepped up to him, giving him a pet on the head, and he had to resist the urge to nuzzle against her hand. While she managed to acclimate to his musky scent he wasn't any better off, rarely able to smell anything other than himself. He didn't care though, he loved his smell, and more than a few times he had Sierra hold a towel that he previously cleaned off with against his face. "It's cute when you get all needy, really makes me horny..~" She growled quietly, rubbing a finger between her legs and coating it in her femcum, lifting it to his face. He gave it a sniff before licking it off, not getting much of her taste but letting out a soft moan. That was the closest she ever did to letting him fuck her. He didn't even remember the terms of the "ownership", just enjoying the control she had over him.

She leaned back against the wall, crossing her arms over her chest. "Listen, Xavier. I was talking to a.. friend of mine, who gave me some advice. He told me that your inability to finish anymore is likely mental, or maybe your body just became dependent on the candies to cum. I could tell on my own that you're finding it harder to cum every time you do." He blushed at that, squirming a bit in place. Did that mean he'd eventually never be able to cum again? It already felt like it. A while ago, learning that revelation might've terrified him, but now he found it turning him on more. She completely denied him from eating the candies since the third stream, hiding them away somewhere in her room. "I did some of my own research too, about the candies. Not much, but after getting enough of a change it'd be made permanent, and more than that could make things.. unstable." She said, only half-lying. He huffed, at least knowing why some of his changes never went away, and some never stopped growing.

"Don't worry, though. I managed to get in contact with one of the big donors from the last stream, and they've agreed to do a private stream.. right now, basically. They were even kind enough to pay to refill the candy jars, so now they're all full again. They'll be giving you plenty of candies, maybe you'll be able to cum again~" She chuckled, reaching down and giving the end of his tongue a little rub. He grunted, more pre leaking from his dick. "A-alright, Sierra." He huffed in response. He sat on his bed with his tail resting along the floor, not really able to do the stream at his desk with how large some of his parts were, watching the garchomp leave to her room and shortly returning with the jars of candy in a box. She set them up next to him, each containing ten of each candy as if they were new, preparing the camera and microphone as well.

She gave his sensitive dick a quick squeeze before letting go, even that being too much for him and making him groan uncomfortably. She started the private stream as she leaned down to him, whispering into his ear. "This is the one that made your tail so large.. let's put on a good show for him." She glanced towards the camera as she hefted up the flygon's large tail, laying it over his body- being careful to avoid his cock- and stroking it with two hands. He joined in, wrapping his arms around his own tail and starting to lick it, not even trying to hold back his girlish moans. She saw in the chat that the donor admitted to recording this, wanting to see the flygon ruined, but she didn't respond, just grinning at the camera for a moment as she kept playing with his tail while he practically worshipped it.

The donor watched for a while, giving a donation that told the two of them to get a bit dirtier. She knew exactly what they wanted, pulling his tail away from him and making him groan, pulling on one of the rubber gloves she prepared and pressing her fingers against his rump, coated in sweat and precum. It took more effort than it did the first time, since she had to stretch him out on her own without the aid of the anal-growth candy. She pushed her finger deep, very lightly teasing his oversized prostate and making him moan. She pushed a second finger in, stretching him out, soon followed by a third. She kept teasing and playing with him, gradually getting him to loosen up before she managed to force her entire fist inside him, cupping and rubbing his prostate in her hand. He was already on the edge of cumming, but he knew it'd be a long time before he came.

The donor was content to watch for a while, the two siblings basically carrying it out the same way they would any attempt to get him off, coating his front in warm precum. Soon they gave the first donation though, bigger than any the two of them had received before. It was for all ten of the anus-growing candies, the thought making him shiver in delight. She pulled her hand out of him, making his tailhole gape wide as it drooled lube. If she looked in- which she had before, in the past- she could see the massive bulge of his prostate in his anal walls. She unwrapped the candies, carefully holding them in her hand as she slowly pushed her fist back into him. She couldn't go as deep as before, since he did have some bodily limits, but it was still more than enough as she let his body absorb the transformatives.

He groaned as the changes started, Sierra huffing as she felt his rump relax around her arm, and get stretchier and looser, until it felt like there was barely anything there- excluding his thick prostate, of course. He gasped, feeling the same stretching feeling in his throat and urethra. She could even see his urethra gape slightly for a brief moment, the precum halting before coming out in an extra-big spurt. She pulled her fist from his rear, hardly feeling his rump pulling at her arm, pulling it wide open with a single finger. It was like stretching a rubber band, and with a whistle she let go. It took a few seconds for his ruined pucker to return to its normal shape, the flygon completely unable to clench but able to feel every bit of the stretch. "Mmh, this gives me an idea.." She spoke, taking a second glove from the box and putting it on her other hand. His eyes widened, he'd never taken both hands before. But he didn't make any move to stop her, instead relaxing his body as best as he could and preparing for the oncoming onslaught of pleasure. At least it'd make it easier for him to cum.

She held her hands together, pushing her finger right into his loose ass, filling him more than anything before. Despite that he took it easily, barely getting an actual stretch as she slid both of her arms deeper, grinding against his prostate on the way. His stomach bulged out but she felt no resistance, pushing deeper still and making that bulge go both further out and further up. She was honestly impressed as she nearly got to the shoulders before her own anatomy prevented her from going further, the flygon taking it like a living condom. He didn't get any pain from it, only mind-shattering pleasure as he was insanely stretched out. She started to pull back, rubbing his prostate with both hands and squeezing it between them. "Heh, I could park a car in here." She chuckled, and he gave a weak little 'mhm' in response.

They continued like that for a while, soaking his body and the bed around him with precum, but eventually he knew that it wasn't enough. He looked up at her and propped himself up on his elbows, barely keeping himself up with the pleasure that every movement brought. "P-please, I need another.." He begged both her and the donor. The stranger agreed almost immediately, but Sierra seemed a bit unsure. If he had more candies he might never be the same, or rather never the same in a more serious way. What if he broke entirely, and wanted to do nothing but fuck? She sighed, looking down at him with both fists still in his ass. She'd never seen him so needy before, an absolutely desperate look in his eyes as he drooled from both ends. "Alright, I'm sure you'll enjoy it." She rolled her eyes.

Immediately after there was another donation, now for all of the ball-growing candies. Both of the siblings gulped nervously. She thought for a moment before opening up the jar, unwrapping the candies and holding them in one of her hands. She pushed him up so he was laying on his upper back, his rear up in the air with his legs and tail over her shoulders. His precum dripped right onto his face, and he eagerly opened his mouth to catch and gulp down his slimy pre. She stretched his ass open with one hand, while the other simply tilted and dropped the candies in. He huffed from the feeling of the candies getting lost deep inside him, the garchomp giving his belly a pat before lowering him back down.

He gasped sharply as an incredibly heat focused on his balls, his hands gripping tightly to the sheets as he felt his balls grow larger and larger, heavier and heavier.. More precum leaked from his dick, but the change wasn't as nearly as large as was caused by his prostate. She had to move back to make room for his growing balls, his scaly sack stretching around his growing balls. Even as his orbs grew his entire sack was still sweating bullets, only making his musk stronger and filling the room with more steam. By the time they stopped growing, his balls nearly reached his feet, and would probably brush against the floor if he was standing up. They were absolutely massive and felt achingly full, cum almost audibly churning inside them. His legs were pinned underneath, his tailhole now hidden inaccessible, at least in his current position.

Sierra stared for a moment, more bewildered than anything at how large the change was, placing a hand on his sweaty balls. He inhaled sharply, the sensation just as strong as if his prostate was rubbed. She smiled at his reaction, putting both hands on his balls and lightly pushing against them, making them wobble back and forth. He groaned, flopping his head to the side with his tongue rolling out, drooling onto the bed. "So cute.." She mumbled, rubbing and squeezing his massive, heavy balls, wondering if he'd even be able to walk with these. The troubles it'd cause was the furthest thing from his mind, getting closer and closer to an earth-shattering climax.

A while later, Sierra was starting to get tired from teasing and playing with his huge balls so much, sweating a bit herself from the heat coming off of his sack. His moans reached a peak, his balls seeming to swell just a bit larger as he finally went over the edge, falling into the depths of pleasure. There was a moment of silence before he cried out, cum jetting from his dick like a firehose, splattering heavily against the ceiling and raining down on both of them, as well as everything surrounding them. The sheer amount of cum stretched out his urethra insanely, immediately overstimulating him, but he couldn't stop it, nor did he truly want to. It came in one constant stream, the first spurt going for almost thirty seconds before the second gush of cum followed, just as strong as the first. The garchomp sputtered, taking a few steps back from him, though she was already covered in musky cum. "Oh man, what a mess.." She sighed, wiping her lips. The bed was completely saturated with his hot seed, spreading to the rest of the floor and only getting worse.

It felt like an eternity before he finished cumming but it was far too soon, cum drooling from his gaped cock. The floor in the room was inches deep in cum, and not a single surface was left without his cum covering every bit of it. His laptop, the streaming equipment, and all of his clothes were ruined, but he didn't care one bit, having forgotten about the stream anyways. Fortunately the donor had recorded every second, getting the poor camera's final moments before it short-circuited. Sierra had stepped out of the room at some point so she wouldn't drown in his cum, but the flygon cream had poured into the hallway and was slowly spreading out further. There was no doubt that the smell would never leave the building, and that's if they managed to clean it at all. He let out a weak moan, resting his head back and starting to fall asleep. A small tingle went through his body, something feeling a bit.. duller. He knew what it was though, not even caring at the realization that he'd never cum again. He didn't care about anything. After an orgasm like that, there weren't many thoughts left inside him at all, as if he came his brains out. It didn't matter though, after that he felt absolutely amazing, falling asleep in a pool of his own cum. Cleanup could wait until tomorrow.