A Night in the Lab (Good Ending)

Story by ViraKitsune on SoFurry

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#5 of My written works

A 5000 word commission I did for Kaoticwolf293 on Furaffinity. Quite a lot to write about, got to stretch my writing arms a bit! Again, generally weird stuff here for most!


Needless to say, it's pretty surprising when a vixen comes up and grabs your arm in the middle of your own home to go about her own agenda, silvery white fur shimmering in the early morning light, accentuating her rather petite form as she brought him along. Always pretty surprising, but Shrapnel had learned to accept this as a fact of life after having her as a friend for so long.

"So um, you know that little experiment I've been talking about?" She asked giddily, as she moved as fast as she could tug him along. The back alleys were a blur as she wasn't the type to like walking along the main roads.

"Which of them? You always seem to ramble about ten or twenty of them every time you get the chance to." He responded incredulously, earning himself a look of exasperation from his vixen companion as she unlocked her door and moved inside.

"The one that... you know what, maybe it's best that this one is a surprise." She giggled mischievously, tail swaying from side to side as she released his hand and let him relax a bit, letting his head clear and make sense of things. If it weren't for it usually being worth it for her to derail his day like this, this would have annoyed him. She held up a pill, nothing more, nothing less. It wasn't colored, it wasn't larger than usual, nothing. But she didn't take it yet. She grinned, stripping right before his eyes and earning something of a blush from the dark-furred saber wolf. Her barely palmable breasts were bare before him, but she seemed to indicate she wanted him to look down with her eyes, opening her maw and popping the pill inside.

She strode forward, pressing against him with a curious expressing on her face, grinding against him and starting to pull down those pants of his herself. "Already?" He asked. But he couldn't see the building lust she was hiding, the pill working in ways not intended, but not unwelcome.

"Why not? It can't hurt, can it?" She cooed with a giggle, caressing over that sheath that he had so naughtily hidden from her for so long, grinding her beyond wet slit against it with soft moans. "It might make the surprise better if we do it like this." She tempted, and indeed the effects were starting to become slowly apparent, something new taking shape above her slit... was that a new sheath? It seemed so, as she began grinding it right up against his own, their members starting to peak from them as she grinned a little wider. "You like the surprise? I could've been much worse about revealing it than this. But I'm not that cruel." She quipped, giving an evil smirk and tracing her digits around his tailhole, her hand had made its way there while he was nice and distracted.

By now she was developing the secondary pieces to her male anatomy, a new, full sack filling out to accommodate that sheath of hers below. She admired that for a moment, pressing her friend against the wall with a wider grin. "And that's what I look like with the extra parts~ they feel pretty nice honestly... always been curious what it would be like to have these." She purred, fondling and playing with them, though taking turns and doing so with his as well, she couldn't help but think they were starting to feel even more full by the moment for some reason.

"Well, why don't you enjoy them while I enjoy something else?" He proposed, such a comfy looking bed she had that it would be a shame if they didn't make use of it, so it wasn't long until she found herself laid out beneath him instead, those orbs still curiously, and actually quite rapidly growing as she panted and squirmed. This wasn't something she'd really implemented at all, but she wasn't too worried. What's the worst that could happen?

"S-so? Mmmh... I know you like my female parts, I'm surprised you didn't wanna try out the new ones so much." She mewled, reaching down to help bring the saber wolf to full hardness with a few sensual pumps, an impressive foot long length already bobbing before her. She might have had male parts, but he was definitely the better endowed of the two of them, and she didn't mind that one bit. She was already throbbing hard herself, leaking profusely with a pair of orbs that outweighed his own by quite a lot now. He even pushed his hands into them, finding them quite fascinating to the touch, much firmer than his own by a wide margin.

"I don't know what you put in whatever you made, but I don't think this is natural?" He stated, and yet that didn't stop him from enjoying it anyway, to the contrary, he fully accepted the situation and just kept playing with them and kneading them a little, bringing out moans and more squirming from her, and the slightest bit of discomfort, but that was already far outweighed by the pleasure he was bringing about anyway. He started pressing his impressive length inside of her, finding her passageway much more... easy to find than usual? It was an awkward way to say it, but usually, it took a little aiming. He lifted her sack, finding a much plumper womanhood underneath, just awaiting pleasure as he saw fit, and he did, slamming his member inside as he knew she would take it.

She moaned out loud, back arching as an impressing rope of preseed lurched into the air and over her front, staining her with her own lightly musky scent, dragging her fingers through the new fluid and taking a little taste with a soft gasp, purring and tightening that impressively strong snatch around his cock, tempting him for more as she gazed into his eyes. "Is that all you got~? Come on, you know this is nothing for me, bring it." She panted and challenged, but it seemed more than that. She was begging. This wasn't going to be enough to satisfy her like this, she needed more, she needed a lot more...

And so he provided, slamming his hips into her at a strong and unrelenting pace, again and again, bringing out some genuine cries of ecstasy. And he did as well, of course, she was always great to have fun with, to put things lightly, but this was a new level of pleasure. It was intoxicating, so much so that he was so caught up in it that he took no time to notice how he seemed to reach just a little deeper inside of her with each new thrust he gave, though still, those orbs actually were getting worryingly large in a way, full of what he could only assume was amazing amounts of seed, so full and round, larger than melons.

"What did you put in that...?" He asked softly, not really expected an answer from her at the moment, as she could only really moan back in response with how well he was taking care of her, and much more so than even he knew, having at least half a foot of new cock, forcing him to shiver in pleasure as the extra nerve endings drove him crazy without him even knowing why yet, though the faintest signs of a bulge were now showing with each new thrust he gave. Wet splurts of pre fired rapidly from them both, insanely so, the vixen he was so effectively rutting making a mess of her front, him and the area around them with ease.

Her now impressively large tunnel massaged in waves along that monolithic canine cock, practically begging for that swollen knot to be brought in, she likely wouldn't even have a hard time stretching around it, her womanhood so plump it looked made to be rutted by the two foot cock stuffed inside of her, his own heavy orbs rhythmically hitting her rear again and again, not to mention being nice and loud as her body was beginning to develop so much more in all ways, including a larger, jigglier rear of course.

He couldn't last, and he tried to. He wanted to make her cry out in ecstasy more, he wanted to go through more of the pleasure, even if there was something vaguely uncomfortable about how things were developing he couldn't quite place, and she even more so, though she was too blissed out to notice. The saber wolf thrust inside and forced a knot easily twice the width of his member inside her, the action alone making her howl in climax, ropes of seed splattering over the room and staining everything in a musky, vulpine scent, her belly burgeoning out as her friend's tremendous load filled her up.

She was finally able to take a moment to breathe, and well, try and speak, her whole body rocked by what was by far the most intense event of her entire life thus far, counting herself lucky she didn't need to go anywhere any time soon, as her legs definitely wouldn't be carrying her. "I'd say it's a success... Wouldn't you?" She panted softly, reaching on down and around her heavily altered body to get a scope on just how much had been altered, feeling that massive sack of hers... Wondering why it felt so tense, and was it her or did it feel like there were somehow more than two balls in there? No, that can't be right, besides, if there's something else they feel.. Smaller. For now. "Seeing as we're going to be like this for a while... I guess now is the perfect time to keep track of all the changes that have happened perhaps." She thought aloud, noting a larger set of breasts for sure, though she couldn't quite see too much beyond that, her own enlarged shaft impressive, but it couldn't compete with his even still, though that too, was a mystery when buried deep inside of her. His cum production, however, was not... And it made her want more.

"I feel like we could go again if you wanted." The wolf proposed, something of a smirk in knowing that the chance she would turn that offer down right now was next to none. He wouldn't turn it down either, whatever she had mixed up clearly had a lot of powerful and fun effects, a cocktail of genetic modifications and hormones perhaps, he couldn't tell. And he knew there was something he could pull off now that might not have been the best idea before, but with her new and enhanced anatomy, he knew that she could take it. There was a massive pop, a slurp and an outpour of some of his fluids, though not as much as he thought, and her belly didn't shrink whatsoever with what he had already deposited. He could've sworn it was even bigger than it was before if anything.

She had cried out louder than she thought herself capable in that moment, feeling suddenly so stretched and then so empty all at once, mind shattered to leave her paralyzed in pleasure for an entire minute, though the moment she recovered there was an eager, burning lust in her eyes that told her that no matter how broken she became with pleasure it wasn't going to be enough to keep her down or sate her in the slightest, motioning him up towards her this time with a curious growl. "Come on, why don't you bring that tasty piece of yours up here so I can have a taste?" She cooed. She wanted to stay alert for a bit, these changes were far more intriguing than she thought, she could receive pleasure in a more controlled way.

"sure, if you can fit it in your maw" The saber wolf seemed to challenge cockily, but in the end, he was being truthful. That piece of saber wolf meat was something that she'd never seen, let alone on someone of his stature at that, reaching all the way up his chest and still leaking some of his last load entirely, just begging for her to take the taste she had wanted.

"Mmmh... Well, I can always just take the tip at first, if that's what's scaring you." She cooed, gripping the bed beneath her, then bringing those hands up to caress those cantaloupe sized orbs he had, feeling the sack heft and the seed slosh inside, panting softly as she suckled and drank away the leaking seed from that member, causing an abrupt and rather strong spurt of it to make her gag and splatter it all over her breasts with a bright red blush, easily visible through that lightly colored fur.

"Oooh, is it too much for you already?" He teased lightly, cracking a smirk at seeing her devolve into such a mess in a moments time. Though who was he to judge, he wasn't exactly clean either. Hell, with the strength of the musk he was exuding he'd think he wasn't at all, and he had showered that morning. But his cock had an overpowering smell to it, not just of the seed and juices it was already soaked in, a deep, masculine scent that she was eagerly breathing, going back in to start suckling, thankfully not having a repeat of the last embarrassment as his leaking was far more controlled. She suckled and slurped just so hungrily, and he could feel her ever-present member lightly prodding against the small of his back, though it was seeming to move away a little more by the moment, that belly swelling for sure somehow, and there was an itch, almost something of a worry... And yet, also not. "I think you're already knocked up, aren't you? Such a fertile bitch."

She huffed and moaned softly, tongue-bathing that cock ravenously, though even with all the vigor she could pour into it, she had a lot of rod to treat with her drooling saliva. It didn't seem to bother her in the slightest though, if anything it looked like a lofty goal she was determined to surpass, hands massaging into those orbs and giving them the well needed relaxation after the hard work of preparing that load for her, getting them well on their way to the next one with her treatment, working on down and around that massive knot, then the large sheath at the base, slipping her tongue inside to the space between it and his cock, the scent and taste of male so strong here that she actually climaxed just from that, awfully sensitive and hair-triggered anymore, painting his back just as she had done to his front, leaving his fur quite matted with all of it indeed.

He growled, suddenly pulling her back and forcing his tip back against her maw, accidentally prodding her nose and dousing it with seed... Starting to notice something very, very peculiar. Not just physically, but there was a new urge he'd never really thought he would want to sate before. But with all the options he had laid out before him... how could he really say no to any of them? He noticed that her muzzle was quite... Different. She'd been paying more quiet attention to him and likely hadn't noticed it, but her nostrils had flared considerably... Looking almost like he could try something new, try a new place for once.

She gave a loud yip of surprise the moment he grabbed her muzzle and pressed his tip against the right nostril of it, the naturally wet snout stretching somewhat to accommodate the first inch or so, immediately being flooded by his pre, making her squirm and resist for a few moments. "Y-you can't actually, a-ahh, be serious! that's not going to work at all!" She cried, but it felt better than it should, way, way better, so her arguments seemed rather weak, because they were. She couldn't argue with more pleasure, no matter how depraved the source of it may be. Who was she to judge, look at what she had become, some warped depiction of ultimate fertility in some way, a belly looking beyond fully pregnant, with balls the same size giving how long they were left to just keep growing, she doubted she could get around by way of her own will very well with a body like this, and with him atop her there was just no way. So she submitted to her fate quietly, feeling him whine softly in want of more pleasure and start giving short thrusts to try and push further in.

it was so impossibly tight and unique, his massive member spreading it so wide more and more, definitely making it hard to ignore now that she couldn't really look around it on one side, inch after inch make it's way in, it hurt, but it was so good, actually moaning like a slut just from getting her nose fucked, the wolf atop her taking the increasingly more dominant role, growling softly and feeling something new start yet again, the effects of that drug so strong it was still working on the both of them clearly, changing them more and more, unknown territory continuing to be crossed with every single moment, whether they liked it or not. The wolf atop her felt a shifting feeling, his body and skeletal structure changing entirely as he had to cling to the vixen as the changes took place, the world spinning as it was so much at once, so violently new and powerful, nothing like anything before it.

It was worth it in the end, so worth it, how could it not be when you've been gifted not only a new set of legs, but a second, even larger package to be put between them a sack large as yoga balls and a sheath that seemed to say that was only the beginning, the vixen's footpaws kneading around it, toes much, much larger than usual too to her surprise, it made it easier to play with that sheath though, so again, how could she argue? Precum was running from her nose freely, from both holes, bubbling down her throat as he just had so much to give her and it just seemed to get all the worse every single second, gasping for air every chance she got, her world so completely dominated by depravity in so many ways, feeling what remained of a perfectly rational mind being broken entirely to fit her form, no interest whatsoever in lessening this anymore... No hesitation. She only wanted more, and that goal was shared by Shrapnel as well.

The swinging, massive sack collided with her face, again and again, dripping with sweat from the physical exertion as those powerful thighs forced an entire foot of cock into her nose with each thrust, stretching it out so comically. She moaned and writhed helplessly beneath him, taking it all in stride, though she pressed her toes into that sheath and played with that slimy, huge member that was hiding within it, moaning and always begging for more, the gurgling sack of hers approaching a couple feet in size per orb now, easily visible egg-shaped indentations all over them as her cock throbbed and kept leaking like an open faucet.

"I didn't expect anything like this either... But I think I'm going to use it to my advantage. You're my toy now~" He growled menacingly, member swelling and pressing up against her, the thing the size of her, but that wasn't all. It was going lower, spreading her cheeks and pushing in to split them wide, the now fat globes of flesh jiggling as he prodded and pressed at that unprepared tailhole, thrusting inside to claim this hole as his own now as well with no mercy. Her belly bulged upwards obscenely, he had to go and bury every single inch of that thing in one go didn't he, her eyes rolling up into her head as her body fell limp, shaft convulsing and pussy quivering in climax again, eggs being shot from her length with each new spurt and yet there was no relief, that sack just kept growing, new bulges appearing in her belly too, showing she was just nowhere near done.

"Moooore..." She moaned, such a broken slut and fitting into her role quite well, just as she was supposed to, acting as the toy she was truly meant to be in so many wonderful ways. And he reflected his new status as her alpha quite well, his body becoming noticeably more muscular, claws and teeth looking a little sharper and more fierce along with all of that. He rut her holes mercilessly, flooding her nose and maw by extension with pre only, stretching out that nostril with three whole feet of cock alone, and double that crammed into her ass. Those sacks even gurgled, distending and swelling, doubling in the number of balls in each gushing outright cum without having orgasmed now naturally, a twisted smile on his face as he too had come to accept his fate, and he was making full use of it as well. Watching that gut of hers swell and swell as she leaked cum profusely from her maw and nose.

Each of his thrusts forced more and more out of her as well, heavy sack as big as she used to be, all in all, eggs spewing in twos and threes out of her cock as the room was becoming a musky stew of lust and juices, the floor flooded a few inches deep, the bed entirely ruined and creaking underneath them as the sheer weight and force that it had to deal with was far beyond anything it was ever designed for, and it was getting exponentially worse, her snatch gushing a clutch of eggs suddenly at a particularly forceful thrust, and continuing to do so with each one that came subsequently. Her belly was swelling even faster, feeling more eggs forming in her stomach of all places as she'd managed to be knocked up in every way she thought was conceivably possible, her alpha so impossibly virile, or maybe she was just that fertile. She didn't care, there was no point in making sense of it, there was only breeding now, that is what matters.

They were nothing but howling and wildly cumming monstrosities to the rest of the world no doubt, though some may have seen the true lustful beauty that they saw, the corrupt nature of their being just wouldn't match up. They'd just have to come around, as this wasn't changing back. No, it was becoming even more, the saber wolf a slave to his own instincts, to become more than any male had ever been, his shafts splitting in two, one massive shaft thumping against the ground and flooding the room quickly as the one to his fore was stuffed into the other nostril, her belly bloating insanely fast as the room looked so much smaller than it used to, the bed having completely collapsed as they bathed in the juices, hundreds of eggs floating in all of it all the wild.

"Isn't this amazing my toy? Look at everything you've done. I don't know what you put in that little pill, but the only thing I can think of is why you didn't make more than one." He hummed greedily, the kitsune's assets billowing outwards, massive breasts and ass so large they'd smother entire sofas underneath their soft flesh, and a snatch that somebody could crawl comfortably inside, releasing dozens of eggs by now with every single thrust he gave. He felt something curious, the eggs developing in her stomach starting to flow outwards and finding themselves blocked, moaning softly as they pressed on into his cum slit, blocking the flow and forcing it all out into the room, only a few feet left before complete submersion as those eggs slid on into his balls.

The vixen toy was such a purrfect receptacle for everything the overwhelming saber wolf now had to offer, and she had so much to offer back in turn. He didn't mind one bit as his own sack came to host some of those eggs within them, filling up further as the room's walls seemed to be closing in around the rutting pair, as if it wasn't enough that they were completely swimming in the result of everything they were rapidly producing as well. The vixen's breasts had even developed to the point they were constantly gushing milk, far more productive than any cow could ever hope to be her alpha pressing against all of the walls first despite her massive belly pushing up and up and up with all the seed he so happily pumped into her.

"About time we opened a window, or well, wall or something is it not~?" He cooed, gasping as he felt his everything surge up and out at an increasingly fast rate, cocks and balls and everything else surging in size as the walls crumbled and cracked with a massive boom, the roof having no choice but to harmlessly cave over the taur as he proved too much for the place to bear. The vixen's snout grew more and more bloated, a curious look on his eyes as he could see bulges of eggs even developing in her massively extending snout even now, a growl of satisfaction as he had so thoroughly impregnated every hole of hers he had attempted to breed without fail.

She had long lost her mind completely to the overwhelming wave of pleasure, at the whim of the immense alpha wolf that stood atop her and towered over the surrounding buildings, gushing out eggs by the dozens from her holes and filling up his balls with them in part, only to be gushed right back out by his other cock that was starting to flood the alleys and streets around them surprisingly quickly. He even had a nifty third cock apiece now for each of them it seemed, and they ended up being stuffed into her maw and rear respectively quite quickly as well, nowhere for the eggs to escape than out of him now, balls big enough to crush trucks expanding faster and faster, pushing against the walls of other buildings as he moaned and howled out to the night, the vixen would've been enough on her own to have destroyed the building they had been in by the sheer amount of cum that had been pumped into her, and the eggs that had developed as a result of course.

The earth was shaking with the force of his thrusts, the air thick with the fog of the musk that was radiating off of their bodies with every passing second, the city descending into a state of blissful pandemonium around them. The city in a constant state of orgy, no time had even been left to call the officials as it was far too late by the time they had realized just what was going on, if the sight of their lewd and corrupt bodies wasn't enough to drive somebody wild, then the musk and the flooding juices would definitely change their mind beyond that, not that anybody seemed to mind in the end, it was too good to stop.

They dominated the majority of the block, the saber wolf just now starting to reach his actual climax, knots swelling out and showing just how impressive they were, even with the already huge size of his members, having stretched the vixen into a cock sock in every single one of her holes now, but those knots were something else, twice as wide as his cocks that were already wider around than a bus each, each being roughly rammed against her holes to stretch, stretch, streeeetch them out without remorse, using his toy as she should be used, and she didn't protest of course, how could she, she was far too lost in pleasure to do anything but give garbled moans around one of his cocks. And he kept working those knots in, those holes stretching impossibly wide as his production was visibly increasing rapidly, flooding the area around them higher and higher, filling up the vixen to help them dominate the block with their size with ease, knots being rammed inside finally with a louder howl, breaking the windows of the city as he came hard.

And the cum came flooding into her at a rapid pace, pushing her out with so much musky, thick love, some of the eggs she'd already gifted him being shot rapidly back inside of her yet again without a moment to waste, and yet the area around them was only getting all the worse with everything that was happening, people being washed away in a tidal wave of cum, milk, eggs, everything they had as they howled in blissful abandon together. The soft pillowy waves of the vixen's body began smothering building after building that surrounded them as her alpha just happened to have more than enough cum to give for a good, long while, whiling away the minutes with feet upon feet of new belly. He wasn't even breaking a sweat with this load really, just freely pouring out of him so easily as if it was just natural to breed to the extent of making someone so pregnant that they rivaled a small country in the level of fertility and production they had of all those eggs. He slumped against his mountains of vixen, so many bulges of pregnancy all along her as the city looked so tiny beneath them now, able to achieve something of rest against the softest, squishiest, and admittedly pretty soaked pillows he'd ever had. "Can't wait for round two..." He muttered, slipping into a nice peaceful rest against the already slumbering vixen.