My Two Sisters

, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

#26 of Complete Stories

Ted's just trying to get his 9th grade English homework done, but his two sisters -- one 17 and the other 19 -- are making such a racket upstairs. What kind of game are they playing together that's making the younger sister scream and moan so much? Fed up with trying to ignore the distraction, he heads upstairs to yell at them and get them to knock it off. When he peeks inside to see what they're doing first, though, he becomes far more than just distracted.

F (dog) x F (dog) x M (dog). Loss of virginity, incest, impregnation, underage (14 year old male, 17 year old female), voyeurism, caught, threesome, light bondage, edging, orgasm denial. 4751 words in 1 chapter.


Cover Art based on Pet Swapping. Used with permission from dilbertdog, IceerTH, Sonikku2008, GBB, and Ketzio.

Ted was trying to be a good dog and finish his ninth grade English homework on time, he really was. Okay, maybe not that_good - he was trying to write his book report on Moby Dick based only on an online summary of the book because he hadn't gotten around to reading it. But still. He was _trying.

It should have been easy to concentrate on what he was doing, since his parents were out of the house, his two sisters were upstairs playing together, and the rest of the big house was completely empty. But it wasn't, of course. His thoughts kept drifting back to something entirely different in that same English classroom: a cute little vixen who sat in front of him. Her name was Sasha, and she'd been occupying his thoughts a lot lately, for some reason. She always wore shirts that were too short for her, exposing a little strip of fur along her belly, at it was those couple inches of fur that had awakened his interest in girls. Not that he'd been able to see much more than that, much less talk to any girls... But now, thanks to Sasha, he had this unaccountable desire to talk to girls, to see them naked, to touch them... He had a vague notion of what girls would look like naked, and a weirdly strong desire to fill in the details. Not that he'd ever have a chance to do that with Sasha. All the boys in the school liked her, so why should she care about him, the dumpy and scrawny cream-furred pup who sat behind her in English class? Last he'd heard, she actually had a boyfriend from the eleventh grade already. Damn lucky guy ... why couldn't he stick to his own grade and leave Sasha to the ninth graders?

He groaned in frustration and put his pencil down. He wasn't getting any progress on this stupid book report done, and it was due tomorrow morning!

It didn't help that his sisters were playing loudly_upstairs. Why were they only so loud like this when his parents were gone? Not that Kayla, his oldest sister, was making much noise. She already had a job at the library in town, so maybe that's why she knew how to be quiet so well. It was Sammie's voice he heard, making all kinds of weird screams and whines up there. But even though she was younger - the middle sibling, and an eleventh grader herself now - she should be more mature than to be screaming like a little kid up there. She was always going on about how _mature and sophisticated she was, especially in comparison to him. So why was she up there making such a crazy racket?

Sammie's screams and moans didn't sound like she was in pain, not exactly. But they didn't sound like she was squealing in joy or laughing, either, which is what he might expect from girls playing. The sounds she was making actually seemed kind of desperate, sort of like whining, begging for something.

Just what the heck kind of game were they playing up there?

Well, he sure wasn't getting any progress on his book report done with all that screaming and whining from upstairs. He got up from his chair - it was uncomfortable anyway - and headed for the stairs. He'd do something about it. Would it be that much to ask for them to keep it down a little?

There was a sign on the door to Sammie's room that had been there for years, and it said 'GIRLS ONLY'. Kayla had told him many times before to never bother them while they were playing... But this was an emergency. Well, kind of. He had to get this report done or he was going to fail. His grades were already none too good, after all, and he did not want to end up in summer school.

His pause at the door was long enough for him to hear Sammie in more detail, though. The spaces between her desperate screams were punctuated by breathless gasps, and there was this weird little wet sound like somebody flicking their fingers over something soft. Kayla's voice came through the door, just a teasing whisper, but he could hear it. "You like that, little bitch? You want it? You want it? Tell me how much you want it and maybe I'll--"

Sammie's voice came, a loud, pleading, "Please!"

Ted had been just about to bang on the door and shout at them to keep it down... But now he was intrigued. Just what the hell were they doing in there?

Slowly, quietly, he tried the doorknob. It was locked. But he'd long ago learned the trick to these doorknobs. The ones on the inside of the house were simple and cheap. There was a little slot on the outside of the knob, and all he had to do was fish a coin out of his pocket and use that to turn the slot. He did it slowly, so the click wouldn't be too loud.

He opened the door just as quietly and slowly, peeking in through the growing crack.

They were naked! They were both naked!

His jaw dropped as he stared in through the crack. He could see Sammie's small breasts, plain as day, nipples and everything, starkly obvious on her white belly. And there was Kayla's russet brown ass, completely bare to him and with her tail raised high above it. And Kayla was touching Sammie, down between her legs, spreading her open, showing pink, so much pink. For a long time now he'd wanted to see girls naked, but he'd never actually connected that thought with his sisters before. Now, everything snapped into place, and even though he knew it was wrong, he stared and drank in every detail he could see of their bare bodies.

Not only were they naked, but Sammie was all tied up! He realized it with a start when Kayla shifted around to her other side, but Sammie just squirmed in place, struggling against the straps holding her. She kept pressing her crotch up toward Kayla's hand, but Kayla moved along with her, never letting her do much.

But Kayla was doing things. She slowly rubbed Sammie's pussy - at least, Ted was pretty sure what he was seeing was what the other kids at school called a pussy. Kayla's other hand pinched at Sammie's nipples, making them harden and stick out more.

He slowly edged the door farther open, to get an even better view. Was this ... what sex was? It wasn't like he'd imagined it. He'd never known that you needed a bunch of straps and things, and he'd thought that you needed a boy and a girl, not two girls. Slowly he poked his head in through the crack in the door, watching intently and drinking it all in with his eyes.

He should have known that the strip of white belly fur Sammie had would have run all the way down from where he'd always seen it on her face, straight down to her pussy, but he'd never quite thought of her that way before, never imagined that before, even though he'd spent lots of time imagining where Sasha's white belly fur stretched to. And even though Kayla didn't have any such strip of belly fur, he still watched her intently, too. Her breasts were much bigger than Sammie's, and they swung and jiggled entrancingly as she crouched over Sammie's helpless body.

"Please," Sammie cried out. "Please let me get off! I need it so much!" She let out a long, whining moan as Kayla pulled her hand away.

"I'll let you get off," Kayla replied.

Sammie instantly reacted to those words, going almost limp in her bindings and letting out another desperate moan.

Kayla turned her and looked directly at Ted, right at where he was peeking in through the door. "You just have to do one thing first."

As Sammie moaned again, Ted froze in place, transfixed by Kayla's eyes. He'd been caught peeking, and there was nothing he could do about it now.

"Get in here, Theodore."

The commanding way she'd said it - and the use of his full name, just like Mom did when she was angry - overrode his fear and nervousness ... and overrode any good sense he might have had. Without thinking, he pushed the door open the rest of the way and walked inside. His eyes stayed locked on Kayla's the whole time.

Kayla got up and shut the door behind him, locking it again. Not that locking it really meant anything - he could just unlock it himself ... but that little click did have a kind of finality to it.

She came up behind him and held her hands on his shoulders, holding him gently but firmly in place. "Okay little bitch - all you have to do is one thing, and then I'll let you cum: you just have to get Ted off first."

Sammie gasped, but she didn't hesitate. She scooted herself across the floor toward him, unable to get up or even move very well with all the straps on her, but she came anyway. In just a moment, she had her face planted against his crotch.

He tried to pull away a little. Watching them naked had made his cock hard, and he didn't want his sister to know that. But every little bit he pulled away, Sammie made up by pressing closer. And he couldn't move very much with Kayla behind him, anyway. The warmth of Sammie's breath filtering in through his pants only made him harder. He was sure she could feel his cock in there as she nuzzled him.

"I can't get him with my hands tied," Sammie whined.

Kayla started rubbing his shoulders like she was giving Ted a massage. He was keenly aware of the slight pressure - and the two small pokes through his shirt - of Kayla's breasts against his back. "Yes you can," Kayla whispered.

With another whimper, Sammie nuzzled up to Ted's waistband and tugged at the fabric around the top button of his pants with her teeth.

Ted stared down at her, transfixed half with terror and half with lust. "W-what's going on? What is she doing?"

"You're still a virgin, aren't you?" Kayla whispered into his ear.

"I, um..."

Before he could figure out whether to try denying that or not, Sammie succeeded in undoing the button. Now she nuzzled in deeper, trying to get the pull of his zipper between her teeth. He could feel every breath she made.

"Don't worry," Kayla said. "Soon, you won't be a virgin anymore."

Finally, Sammie got the zipper in her mouth. She yanked it down all at once.

"But I..." Ted had no idea what he wanted right now. Oh yes, he wanted to lose his virginity. But with his sisters? And what about--

Kayla's hands brushed down his back. Her fingers hooked into the waistband of his underwear and pants together, and she yanked them down.

His cock sprang out once it was freed, and it bopped Sammie in the face. She didn't complain, though. Instead, she opened her mouth and took his cock inside with a suddenness that nearly sent him reeling. One moment he was standing there, unsure of his situation as his sister nuzzled his pants - the next moment his cock was inside his sister's mouth! Her wet, supple, and warm mouth.

Ted's own mouth dropped open, his eyes going wide as Sammie took his cock deeper and deeper. The red skin of it slipped easily between her lips until the whole thing was in her mouth. She gagged a little and closed her eyes, but she didn't stop bobbing her head down there, pleasuring him with everything she had.

"S-Sammie," he stammered. How could he even process this? What was he supposed to do? He was at a complete loss.

Kayla wasn't, though. She seemed to know just what to do ... or at least have her own ideas about it. She pulled his shirt up around his armpits and tried tugging it higher until he went along with her and let her pull it all the way off. On her way back down, she fondled him all over - his chest, his back, down the front of his belly.

He was left completely naked except for his pants still around his ankles. That wasn't a state he'd been prepared for. It was a recurring nightmare to be naked in front of a bunch of girls, even. But for some reason, it didn't seem scary now. Maybe it was the fact that they were naked too. Maybe it was the feeling of Sammie's tongue sliding up and down his cock overriding everything else. He'd jerked off before, even though the other kids at school said that jerking off was gay. But he'd never felt anything like this before. Sammie's slurping mouth sent shivers up and down his whole body and made his fur stand on end ... and no matter his other feelings about anything else, the one thing he was sure of was that he liked it and he didn't want it to end.

Kayla's hands slipped down over his hips, sliding past where Sammie was working him over, reaching all the way down to cup his balls. She gently rolled them between her fingers, getting a feel for them. "Yes," she murmured into his ear, "these will do nicely. Sammie's in heat, you know."

In heat?_Sex Ed classes at his school level had been vague about a lot of things, but they were very clear on what being in heat was about. It meant she could get pregnant. She could have babies. And they had also warned that being in heat would make you so horny you could barely control yourself. He knew he should leave right away, but _oh, the feeling of her mouth on his cock... Maybe he could stay just a little longer? He knew she couldn't get pregnant through her mouth, anyway.

Leaving him up to the attentions of Sammie's capable mouth, Kayla circled around them both and knelt down behind Sammie. When Kayla's hand disappeared underneath Sammie's tail, the effect was obvious and immediate. Sammie melted into her older sister's touch, and she let out a long, needy moan that Ted could feel through his cock. Somehow, that made things feel even more amazing.

Sammie pressed back against Kayla's hand, no longer taking his cock quite so deeply as she instead focused on rubbing herself against ... against whatever it was Kayla was doing down there.

But Kayla didn't let Sammie get distracted. She kept her hand busy down there, but with her other hand, she grabbed the back of Sammie's hair and shoved Sammie's head down on Ted's cock, forcing her to take it all the way down to the base, even deeper than she had before.

Sammie's gags and coughs mixed with her moans, and despite his mixed feelings about doing this to his sister, Ted couldn't deny that the sounds she was making and the convulsions of her throat around his shaft felt amazing.

So amazing, in fact, that he felt his knot growing and spreading Sammie's lips even wider apart. He was getting close, really close, and faster than he ever had before. "Sammie," he said, feeling that she deserved _some_kind of warning, even though he was pretty sure Kayla wouldn't let him cum anywhere other than straight down her throat. "I'm gonna--"

Before he could finish, Kayla yanked back on Sammie's hair, pulling her head off of his cock. Sammie gasped for breath, and Ted's near-orgasm slowly faded in urgency. He drew slowly back from that brink.

"Oh no you don't," Kayla said. "You're not done yet."

Ted wasn't even sure which one of them she was talking to.

But it didn't matter. With her grip on Sammie's hair, Kayla dragged her up and over to the bed, lying her down on her back with her legs hanging off the edge. In a couple quick motions, she'd freed up the bindings on Sammie's legs and spread them apart.

Gazing down at his sister's spread-open pussy, Ted gulped. He could see now, with a surprising clarity, where this was all going to end ... and yet, he felt powerless to stop it. He knew his own body wouldn't let him pass up a chance for ... for this.

Kayla got up onto the bed as well, straddling over Sammie's body and facing Ted. She reached down and spread Sammie's pussy lips open even wider between two of her fingers. "Ever seen this before?"

Ted shook his head no.

"Well come on, then. Take your sister's pussy. She needs you."

How could he have done anything else? Moving as if in a daze, he shuffled over toward the bed, his red cock pointing the way. He would have been able to move easier if he could spare the time or the thought to step out of his pants, but instead he just shuffled over there with them still around his ankles.

All that mattered was that dripping-wet pink slit glistening up at him. He could see the complicated little folds inside it pulsing and squeezing as Kayla rubbed her fingers around the edges a little, making Sammie moan some more.

Before he knew it, Ted was standing right in front of his sister's pussy, the pointed tip of his cock almost touching her most intimate spot, right where the white of her belly fur finally came down to a point.

"Don't worry." Kayla grabbed his spit-slick cock firmly with her other hand, still holding Sammie's pussy open for him as she pulled him forward. "Sammie's a virgin, too, at least in the sense that she's never had an actual dick inside her before. You can be each other's firsts. Isn't that sweet?"

Just as Kayla said the word "sweet", Ted's tip plunged into Sammie's hot and needy pussy. Not all the way in - he couldn't get all the way in with Kayla's hand still wrapped around his base, but far enough for him to feel her tight, gripping warmth. He gasped, and so did Sammie.

"Feels good, doesn't it?" Kayla let go of his cock and surprised him by leaning in for a kiss.

He didn't know how to respond to the kiss at first, but that didn't seem to slow Kayla down. Her tongue played against his lips, teasing its way inside and overwhelming him with the new sensations. And as she kissed him, she wrapped her arms around behind his neck and lower back, drawing him closer to her ... which just happened to pull him all the way into Sammie's pussy as well.

Once he was overwhelmed by the new heaven he found his cock in, Kayla kept only the arm around the back of his neck. With her other hand, she went back to playing with Sammie's pussy, making Sammie moan even louder than she already was.

Running on instincts alone now, Ted pulled his hips back a little and then pushed himself back inside his sister's pussy. Yes, that was it. Moving inside her felt just as good as the first time it had slipped in - so good that it made his legs feel weak and almost made him fall down. But he powered through it. The last thing he wanted was anything that might make his cock slip out of her pussy now. It felt too good to leave.

As Kayla finally separated from that unexpected kiss, she slid her muzzle along his cheek and whispered into his ear again, "Just how long have you been wanting this? Watching your sister and wanting your cock inside her, wanting to cum inside her?"

He ... hadn't. Not at all. Somehow he'd never connected the concepts of 'girls' with 'sisters' before now. Before he found his cock abruptly inside his sister.

"I bet you jerk off to her every night. I bet you can't wait to blow your load inside her sweet little virgin pussy and make her pregnant."

"I..." He couldn't answer her. He didn't even know what he wanted, other than he wanted to keep these amazing feelings going on as long as he could. Impulsively, he reached up and grabbed Kayla's boobs, squeezing them together with both hands. He'd never touched anything like them before, so soft and squishy and yet keeping their springy round shape. Kayla let out her own little moans as he thumbed the stiff little nubs of her nipples.

That was nothing next to Sammie's moans, though. She was crying out so loud it would be a miracle if the neighbors didn't hear her. "Please, mistress! Please let me cum!"

"No!" Kayla said sharply - and right in Ted's ear. "You have to get Ted off first, little bitch. If you want to take care of this heat, you have to do it the old fashioned way - with a cock squirting your pussy full of cum!"

Sammie moaned deeply. "Please Ted, please. I need it so bad!"

He grunted as he kept moving his hips back and forth. It was looking like Sammie wouldn't have to wait so long. There was something about touching Kayla's big, soft boobs that was driving him faster and faster toward his climax. The base of his cock swelled out into a knot again, and he wasn't able to get it inside Sammie's tight entrance anymore. He couldn't get as deep, and without that depth, he couldn't drive himself quite to the end he was starting to need as desperately as Sammie did.

But Sammie had a trick of her own left. She wrapped her legs around Ted's ass, pulling him in with all her strength. Together, they overcame the tightness of her entrance and Sammie's pussy stretched around the bulk of her brother's knot, closing shut around his base and locking him in.

He couldn't move much anymore, but with the way Sammie's pussy was convulsing all around his length, he didn't need to. The sensations kept growing and growing. It was like when he was close to the end of jerking himself off, but it was so much more. He felt like he was about to explode inside her. "Sammie!" he cried out. "I'm really gonna--"

"Pull it out!" she cried back. "I can't get pregnant now! Not with you!" But her legs never stopped squeezing him close, and even without her legs, he wouldn't have been able to pull his knotted cock out of her pussy quickly enough.

Instead, he gave into his instincts and pushed as deeply into Sammie's pussy as he could possibly go.

Kayla reached down and fondled his balls as they pressed tightly against his sister's body. "Yes," she said in a breathless whisper, squeezing them gently as if she meant to juice him. "Cum inside your sister. Get her pregnant. Pump out every drop of cum you've got and knock this dirty little bitch up. I know you want it. I know you want to watch her belly grow big and round from the load you shoot inside her. Give her every drop."

He couldn't hold himself back any longer. The feeling of Sammie's tight hot pussy squeezing around his cock, the masses of Kayla's soft round boobs filling his hands, the mingled sounds of Kayla's taunting voice and Sammie's desperate moans... He was assaulted by pleasure on all sides, and his defenses finally gave. With a guttural moan of his own, he threw his head back and let go. His cock pulsed more powerfully than he'd ever felt it throb before, and amidst the sweet pleasure and relief of orgasm, he felt the thick stream of cum flowing through his cock, gushing out deep inside his sister's fertile womb.

As more and more of it came, Kayla let go of his neck and devoted all of her attention to rubbing the top edge of Sammie's pussy. By the third heavy spurt of cum, Sammie had hit her peak as well. She screamed, putting all her previous sounds to shame as her body arched against the bed. Her pussy clenched and suckled at his cock, milking even more cum out of him.

And still more came. Sammie's convulsions triggered more thick throbs of cum to pour into her pussy, and each pulse of his cock triggered another convulsion from her. They played off of each other, seemingly able to go endlessly as their mixed juices began to seep out from between where their bodies incestuously joined.

Eventually, though, there just wasn't any more to give. His cock no longer pumped long, powerful streams of cum into her. It throbbed just as hard, but only leaked out a few drops at a time, if that. It wasn't easy to tell. Sammie also ran out of energy, collapsing flat against the bed. Her whole body still trembled, but not with the same kind of powerful convulsions she'd been having a moment ago.

Kayla was the first to move, swinging her leg around and getting off of her little sister while the other two still struggled to catch their breath.

Ted looked down, his foggy mind wondering where those lovely handfuls he'd been squeezing had vanished to. When he looked, all he was in time to see was the big wet spot Kayla's pussy had left soaking into Sammy's white belly fur.

Finally, things began to settle down for him. For both of them. Sammie's breathing steadied, and her limbs hung down flat, her legs slipping down behind Ted back down to the floor. Ted finally got control of himself as well. In a shocking moment of clarity, he had the sudden realization that while a lot of what Kayla had been saying about him wasn't true - that stuff about watching her and yearning for the day he'd be able to cum inside her - it wasn't true about him. It probably was true for Kayla herself. If Kayla had a cock of her own, she'd probably have done this with Sammie a long time ago...

As Sammie's pussy relaxed and Ted's knot softened, he was finally able to pull himself out of her pussy. The moment he did so, a thick glob of white cum began to leak out between her pink pussy lips.

Kayla didn't let it drop to Sammie's tail, though. She Scooped it up, plunging three fingers recklessly into Sammie's pussy as she did so, and she brought her hand back up dripping with cum. This must have been something Sammie had done before, because she opened her mouth right up as soon as she felt her sister's fingers.

Ted watched in utter amazement as one of his two sisters greedily licked and sucked his cum off of his other sister's fingers. He'd never in his wildest fantasies imagined anything like this.

"Is this..." He breathed deep, suddenly feeling woozy as if he might pass out. "Is this what you two do every time Mom and Dad are gone?'

Kayla smirked at him as Sammie kept busy on her fingers. "Not anymore. Now it's what all three of us do every time Mom and Dad are gone." She reached out with her free hand and grabbed Ted's wrist.

He staggered forward a little as she planted his fingers against her dripping-wet pussy. He still had his pants around his ankles, and that was making it difficult to balance. It didn't stop him from rubbing the soft wet heat of Kayla's pussy lips, though. He even managed to stick a finger partway into her slick entrance before she pulled his hand away.

"Not yet," she told him. "Maybe if you keep doing so well with Sammie, you'll eventually get a taste of this." She used her grip on his wrist to pull his hand up to his own mouth and shove the finger he'd just been trying to insert into her into his own mouth.

The tangy taste of pussy juices - the first taste he'd ever had - flooded his mouth. But ... if he was already tasting it, what could the 'taste' be that Kayla was offering him as a reward?

Get many more not-yet-published stories and vote on which story gets written next on my SubscribeStar! Supporters also get to decide which story I'll write next, and they get big discounts on commissions!

Or if you liked this story and want to send some love but SubscribeStar seems like too much of a commitment, you can send a gift on your own terms through BEABACKER, with no strings attached!