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Katherine hid her face behind her hands and squeaked. "Oh god, oh god, oh god, don't let him do it, noooo," she whined.

My cousin was sitting on Jenna's bed, naked, with her legs spread wide. While she waited there nervously, Jenna was helping our big brute of a dog Max up to her. Not that the beast needed much instruction - by this point he was an expert at licking pussy. It had taken an inordinate amount of coaxing to get Katherine to agree to this, however. She was, after all, quite terrified of dogs.

When we'd suggested that Katherine try it out, the answer had initially been a firm 'no,' but for the past few days Jenna had been filling her head with stories of just how good it felt when Max licked her. Eventually we'd convinced her to watch Jenna and Max together. My little sister had not spared any theatrics, twisting and moaning and petting the dog's head as he lapped at her pussy noisily. Our cousin had been wide-eyed through the whole affair, but her pussy had been dripping wet, and I'd fingered her to a shuddering orgasm while Jenna got hers with our dog.

That had all led us to tonight. As an extra precaution, we'd pressured Katherine into having a few drinks; not enough to get her drunk, but just enough to loosen her inhibitions. I remained sober, as always, but Jenna had also downed several beers. I'd have felt a little guilty about it if it wasn't so much fun to have two tipsy young girls at my beck and call. My sister and I had then teamed up on our cousin, licking and kissing her and whispering sweet nothings into her ears until she'd practically begged us to get her off. That was when Jenna let Max in, and against her better judgment Katherine had finally relented.

Now she was begging us to call the dog off, but it was far too late for that, and judging by her glistening labia, she wanted it to keep going anyway. Once Max had caught sight of the aroused girl, he'd wasted no time in burying his nose in her crotch. Katherine let out a shrill "Eeek!" that would have certainly attracted attention had we not been home alone. Then she sat perfectly still with her hands still covering her face and let the dog do as he wanted.

This was Katherine's second experience with bestiality. As much as she had enjoyed her encounter with her cat Sourpuss, I'd been unable to get her to repeat the incident. She had, however, allowed me to fuck her whenever I wanted. The issue of a condom had come up a few times, but I had managed to awkwardly deflect it each time, and although she was always hesitant, by the end of our fuck sessions she rarely protested when I blew my load inside of her.

As for the dogs, we still hadn't told her that Jenna and I actually had sex with them. That was one surprise we were still keeping, hopefully for later tonight. Now that Katherine had let Max in between her legs, Jenna and I planned to see her mounted and knotted by the end of the night.

The noise of Max's long tongue on Katherine's wet pussy filled the bedroom. The girl was still whispering "No no no no," over and over again under her breath, but her pelvis had started to move of their own accord. She thrust herself up against Max's muzzle, desperate for more stimulation, even if it was from a dog.

Jenna, who was also totally naked except for the collar I'd gotten her, had been kneeling by the side of the bed, playing with herself and watching intently, but eventually she climbed up onto the bed and lay down next to Katherine. With a playful smirk, she reached up and eased the older girl's hands away from her face. Now that her vision was unobstructed, the red-faced girl looked down at the animal between her legs. She let out a long, desperate "Nooooo," that turned into a moan halfway through.

"See, doggies aren't so bad," Jenna said to her. She gave our cousin a kiss on the cheek, then crawled down towards Max and reached underneath him. "And I bet you'll learn to love his cock just as much as his tongue."

"W-what?" Katherine stuttered, her overloaded brain trying to make sense of what Jenna had just told her.

I could see that Jenna had grabbed Max's cock and was stroking it slowly, but from her position, Katherine had no idea what was going on. Not wanting to freak my once-innocent cousin out too quickly, I spoke up to keep her focused. "So how does it feel?"

Katherine was breathing heavily. "It's... really good," she said. She was definitely getting over her fear of dogs.

"Why don't you give him a little bit of encouragement?"

With some hesitation, Katherine reached out and placed her hand on Max's head. "Good dog..." she panted. "Keep licking me please... good dog..."

While our cousin babbled mindlessly to Max, Jenna continued to jerk the dog off. Little squirts of canine pre-cum dripped down onto the bed sheets and her hand as she worked. Eventually, my sister removed herself from Max's shaft and crawled back up to Katherine. Jenna held her hand, slick with Max's juices, up to the older girl's face and smeared the stuff along her lips. When Jenna stuck a finger into Katherine's mouth, the older girl instinctively began to suck on it, completely oblivious to the fact that it was coated in dog cum.

I had to give my sister credit; she was a wicked little girl, and it really turned me on. With Katherine still nursing on her fingers, Jenna looked back at me and I could tell we were both thinking the same thing. It was time to let Max have his way with her.

At first, our cousin seemed confused when I grabbed Max by the collar and pulled him away from her pussy. A combination of lust and alcohol had her in a bit of a haze, and she blinked as she tried to process what was happening. With Max gone, her face was a mix of both relief and disappointment. She wiggled her hips and moaned in frustration, desperate for the oral pleasure to resume but too embarrassed to ask me to let the dog get back to it. Her obvious distress only encouraged me to tease her.

"Do you want him to keep going?" I asked.

"Timmmm," she whined. When she saw that I wasn't going to relent, however, she gave in. "I want it..."

A big grin spread across Jenna's face, and I could tell exactly what she was thinking: "You're gonna get it alright!" When I let go of Max, she reached over and gently patted between Katherine's legs. Well trained by now, the dog knew exactly what that meant. Katherine threw back her head and spread her legs wider, expecting Max to go back to licking. When that didn't happen she looked down, only to realize that the dog suddenly seemed much closer. The horny animal stood over her, his tongue hanging out of his mouth just above her bare breasts. Katherine's whole body went stiff and she let out a surprised yelp.

"B-bad dog, get down!" she stammered. When it became clear that Max wasn't listening to her commands, she cried "Help!"

Jenna was helping, but not in the way that Katherine was hoping. Although the dog had fucked my sister missionary before, the position was still awkward for him. He was jerking back and forth in frustration, his cock bumping against Katherine's slit but unable to penetrate. Luckily Jenna was there between his legs again. Max's thrusting slowed when she wrapped her hands around his stiff red member, and he allowed her to guide him.

"Max, no," Katherine was saying, too distraught even to push him away. Distracted by the dog's unexpected close proximity, she didn't even realize what was happening until it was too late. "Get him off me!" she shrieked. A moment later, Jenna let go of Max, and the dog plunged himself into the vulnerable girl. Katherine's head flew back against the bed and her mouth flew wide open in a silent cry.

Now that he had gotten his cock inside of her, Max began to fuck our cousin with all of his might. Katherine's silent cry slowly melted into a muted wail of dismay and pleasure. Her hands gripped and twisted helplessly at the bed sheets and her hips bucked up to meet Max's brutal thrusts. Drool dripped down from the dog's tongue and onto Katherine's breasts, a fact which would have disgusted her if she'd had the time to notice. Not that she'd have been able to do anything about it in her current state anyway; as it was, she was pretty much pinned underneath her four-legged lover.

"Max, stop, no," she was saying over and over, but her body was expressing a different sentiment as it pressed up against the dog.

"It's okay," Jenna cooed softly in her ear. "Doesn't his doggie cock feel good? Just spread your legs and be a good bitch." She planted another soft kiss on Katherine's cheek, then another, and another, until she was practically licking her older cousin's face. All the while her fingers were busy working away between her legs.

"No... it's..." Katherine tried to say, stopping to gasp and moan between each word. "Oh god... it's... so good. Max!" Her lust won out at last and she wrapped her arms around Max's furry body, urging him on. Her animal lover humped her frantically, thrusting his canine cock into her again and again in an attempt to knot her, and Katherine begged him for more.

I stroked myself slowly as I enjoyed a front row seat to my sweet cousin's debauchery. First I knelt by the foot of the bed and watched Max pound her pussy with all his might. Feminine juices and pre-cum seeped down from their point of contact and onto my bed sheets. Moving around to the side of the bed, my eyes roamed over Katherine's body. Her hips twisted and gyrated in response to each of the dog's thrusts and her breasts, spattered with dog saliva, jiggled enticingly.

Jenna had tilted Katherine's head to the side and was now tongue-kissing her. Their lips were still locked together when Max finally managed to knot his human bitch. Katherine's eyes flew open and she cried out into my little sister's mouth. When Jenna pulled away from her, she cried out in pleasure. "Oh fuck, it's so big and warm! He's cumming...!" And then Katherine's body began to shake violently, her back arching, pushing her body up against her furry lover. It was a sign I'd come to know intimately over the past couple of days: Max's knot had pushed her over the edge, and she was now cumming also.

The wanton display of bestiality and lesbian incest had my cock throbbing for release, and I wasn't about to miss my opportunity. I stood and jerked myself off until I felt the familiar stirrings in my loins. Katherine started at the unexpected blast of cum that spattered across her face, but she was otherwise too lost in her own passion to react. The next shot of sticky seed landed in her mouth, and she swallowed the mouthful reflexively. Not wanting to be left out, my sister leaned closer to Katherine and caught my third blast on her tongue. The bed shook wildly as the four of us rode our orgasms to final, blissful satisfaction.

When it was over, Max stood proudly, his knot buried deep in Katherine's vagina and his tail wagging. My cousin lay panting beneath him with her eyes closed. She was covered in sweat, saliva and semen. Jenna continued to lick Katherine's face, scooping up all of my cum with her tongue and swallowing it greedily. I squeezed the last drops of the stuff from my softening dick, then got down on my knees and leaned against the side of the bed. My little sister looked up at me between licks, her eyes displaying both love and lust. When my gaze met hers, she shoved her cum-soaked tongue into Katherine's mouth, and our cousin moaned, returning the kiss.

Unsurprisingly, the encounter did a lot to help Katherine overcome her discomfort around dogs.

Now that her initiation into our little club was complete, there was no reason for us to hold anything back from her, either. While Katherine waited for Max's knot to shrink, we gave her the full details of our first incestuous encounter; namely, Lucy's involvement in it. When we told her how we'd each fucked our dogs in a public park, our tied cousin's hand drifted down between hers and Max's bodies until she found her sensitive clit. By the time we'd finished our recap of all of our kinky escapades, she'd managed to masturbate herself to another orgasm, the tight walls of her stuffed pussy clamping down possessively around the dog dick that was still stuck inside of her. When Max finally pulled himself out a few minutes later, Katherine looked almost disappointed.

"He's a good boy," Jenna said, seeing her expression.

"Did I really just let a dog fuck me...?" Katherine asked in amazement.

My sister's eyes had that mischievous glint in them again. "My turn next!" she cried.

Max needed some cooling off time, of course, but telling all of those naughty stories had gotten me hard and ready for round two. While my pre-teen sister roughhoused with our dog on the carpet, I climbed onto the bed and positioned myself between Katherine's legs. She spread them obediently, giving me a look at her freshly fucked slit. The dog cum oozing out of her only turned me on more, and I wasted no time in taking sloppy seconds. Gritting my teeth, I leaned over her and pinned her arms to the bed while pounding her used pussy as hard as I could. Her insides were a warm mix of animal and human juices, and the walls of her velvety tunnel pressed down around my shaft invitingly. Katherine looked up at me with a glassy-eyed expression. At this moment, she looked like she'd do any kinky thing we asked her to do without complaint. The bed shook as I thrust myself back and forth on top of her until I exploded inside of her.

Jenna, meanwhile, had coaxed Max's cock back out of its sheath. By the time I'd finished dumping my second load in Katherine, she was already on all fours beneath the horny dog. Katherine took a moment to stroke her tummy lovingly, reveling in the interspecies mix of cum filling her womb, before turning her attention to the younger girl. Now that she was the center of attention, my sister started to put on a show. She bucked and moaned, begging Max to shove his knot inside of her. She raised one arm up over her shoulder and stroked her canine lover's muzzle. He returned the sign of affection by licking the side of her face. Jenna giggled, turned her head, and opened her mouth, allowing Max's long doggy tongue to explore the recesses of her mouth.

Our cousin's face flushed even darker red at the sight of the pre-teen girl french kissing our dog while he fucked her; she still had a long way to go before she could keep up with our depravity, I thought to myself. Luckily we had several weeks left before she went back home.

"Can I watch you and Lucy too?" Katherine asked me without taking her eyes off of Jenna and Max.

"You bet," I answered her. "But not tonight... next time."

Jenna, who was practically sucking on Max's tongue, suddenly let out a deep moan. Her eyes rolled back in her head and she clawed at the floor desperately. Max whined and gave the girl a few more awkward pumps before coming to a stop.

"He's knotted her. That always makes her cum," I explained. "Why don't you go get a closer look?"

After a moment of hesitation, Katherine slid off of the bed and crawled across the floor towards Jenna. I followed, and together we both shimmied our way underneath my sister's tummy while she rested on her hands and knees. The pre-teen's slit was engorged by the large dog knot filling it. Clear juices ran down her legs, but most of Max's cum was being kept bottled inside. Katherine marveled at the sight. "Oh my gosh, I can't believe that whole thing is really in there!" Reaching up, she gingerly ran her fingers across Jenna's labia and the part of Max's bulbous knot that was just barely visible within the girl's tight folds. Jenna's moan goaded her on further, and she seemed to take a perverse joy in pleasuring my little sister while exploring everything intimately.

Eventually Max started getting restless, and Jenna warned us "He's gonna slip out soon."

When it did, Katherine got another surprise: a sudden burst of animal semen sprayed her right in the face. She took it like a champ, however, opening her mouth to catch some more as it seeped out of Jenna's well-fucked pussy. When the flow ceased, she rolled out from underneath the younger girl and looked at me. A lock of dark, cum-spattered hair had fallen across her face; by this point, it was impossible to tell whether it was human cum or animal cum.

Pushing the stray hair out of her eyes, she asked me "So am I officially part of your little club now?"

I smiled back at her. She was turning into quite a sexy little slut.

__________________________________________________________

It was a few days later that I got the opportunity to keep my promise to show Katherine the kinds of fun I had with Lucy. Mom and Jenna were gone, and we were sitting on the couch together when Lucy meandered into the room. Katherine looked over at me, her expression a silent question. I smiled and called Lucy over. The female dog made a beeline for us, her tongue hanging out of her mouth and her tail wagging back and forth in excitement.

"Hey Lucy, good girl," I cooed to her as I scratched behind her ears. Everything looked like a completely normal exchange between a guy and his dog... until I unzipped my pants. The moment my erect cock sprang out, things changed; Lucy dove right in, tilting her head slightly and lapping at the sides of my shaft. "Good girl," I repeated again, my voice heavy with lust. I turned to Katherine. "She loves the taste of cock."

My cousin was totally fixated on the act unfolding before her. I looked back down at Lucy and had to admit: it was a really erotic sight. Her long doggy tongue ran up the sides of my manhood, coating it with saliva. First she worked her tongue around the base, then moved further up with successive licks, until she reached my head. Lucy's tongue rolled along the top of it, collecting the large bead of salty pre-cum on the tip in one go and then immediately coming back for more. I moaned and allowed her to do her work. I loved getting oral sex from my little sister - and my cousin too, now - but there was nothing else like one of Lucy's hot lickjobs.

As always, my instincts were screaming for me to blow my hot load right then and there, all over Lucy's probing tongue. She would have loved that too; my dog was always very insistent that she be allowed to lick up every drop of semen that I produced for her. But Katherine wanted to see more. She wanted to see me fuck her, and I wasn't going to disappoint. I allowed Lucy to keep licking me for a few more minutes, savoring the wet hot feeling of her tongue and the wet lapping sounds that filled the room.

Suddenly I had a very naughty idea. I put my hand on the dog's head and gently urged her away. She whined in disappointment, but eventually she got the message and stopped licking me. She was a good dog. Then, turning to Katherine, I said "Let me feel your mouth now."

Katherine blinked in surprise and hesitated. Hoping to coax her along, I put one hand on the back of her head and gently pushed her down. Silently, she allowed me to guide her towards my glistening cock. When her lips bumped against my head, she opened them obediently and took it into her mouth. I moaned and stroked her hair as she began to bob her head up and down, taking more and more of my shaft, still wet with dog saliva, down her throat without protest. Pushing her down a little harder, I reflected on how lucky I was to be able to experience the pleasures of both a doggy lickjob and a human blowjob back to back.

Lucy, however, was only content to watch for so long. Her tail whapped against the carpet and she whined again. Then she nudged her way back between me and Katherine, her tongue darting out to lick at my crotch. Instead of pushing her away again, Katherine took her mouth off of my cock and offered it to the dog. After Lucy had gotten a few more licks, she lowered her mouth down around me again. The two of them continued to take turns like this, first Katherine and then Lucy attending to my rock hard cock, until they were both pleasuring me at once: my cousin's lips were closed tightly around the top half, her tongue swirling around my head, while my dog's tongue ran along the bottom of my shaft, even straying far enough to lick Katherine's stuffed lips and cheek.

Lickjobs and blowjobs each had a unique sensation to them, and getting them both at once was an intense feeling. I held back for as long as I could, but pretty soon I was ready to blow my load. Placing one hand on Lucy's head and the other hand on Katherine's, I surrendered to inevitability; my cousin would just have to wait for me to recover for round two.

Katherine blinked in surprise when the first gooey shot hit her square in the face, but in an instant she reacted by opening her mouth and sticking out her tongue to catch the next shot. Then she grabbed my shaft and aimed it right at Lucy; the dog redoubled her licking and attempted to lap up as much of my salty cum as she could. By the time I was done cumming, both Katherine and Lucy had received a generous amount of cum all over their faces and mouths. My cousin went in to clean up the last remnants from the head of my cock. Then she turned to Lucy and allowed the dog to lick her cum-coated face.

I was still determined to fuck Lucy for Katherine's benefit, but now that would have to wait. Instead, we both lay down on the floor beside the dog, lavishing her with praise and petting. When my hand wandered down towards her furry nethers, Lucy rolled over onto her back; she knew it was playtime! I urged Katherine to explore the dog's body, which she did, showing none of her old trepidation around dogs. My cousin's fingers traced lines around Lucy's rows of nipples and she giggled, remarking how lucky dogs were to have more than two of the sensitive little buds. Then she shifted her attention further down to Lucy's doggy pussy. She teased the opening at first, then spread it open for a closer look, even going so far as to give it a little lick. Deciding that the taste was not unpleasant, she continued to give the dog a little oral love, under my encouragement.

A few minutes of that was enough to get me hard again. I let Katherine have her fun for a little bit longer, then gently nudged her aside and took up my position between Lucy's splayed hind legs. Her canine pussy was already slick with Katherine's saliva, and my cock slipped in easily. My thrusts were slow at first, and I leaned back to make sure my cousin had a good view of it all. Katherine leaned in closer and closer, her eyes fixated on the act of forbidden lust, until I could feel the warmth of her breath on my skin. Then I was rewarded with the sensation of her tongue darting out to lick the base of my cock. I groaned and put my hand on her head, pressing her down further to let her know that she should continue. While my cock pumped in and out of Lucy's tight slit, Katherine's tongue traced its way along both of us, even going so far as to try to push its way into the dog's stuffed tunnel alongside me.

When it came time for me to cum, I slammed myself deep into my canine lover and emptied my load. Then I pulled out, allowing my cousin to slather my deflating shaft with her tongue before diving in to Lucy's doggy cream pie in an attempt to suck as much of my cum out of her as she could manage. Needless to say, I was proud of her. Pretty soon she'd be just as perverted as my sexy little sister.

The debauchery continued for several more weeks, until finally the time for Katherine to return home drew nigh. We bid our farewells in the usual style, with a big orgy of incest and bestiality. Katherine promised to keep in touch with us, and added that she was hoping to come visit us again sooner rather than later. Jenna and I echoed the sentiment, and I added that I hoped she would continue to experiment with new things. She blushed deep red and confided that she was considering offering dog-watching services for her neighbors.

And then she was gone, and it was just Jenna and me and the dogs again.

__________________________________________________________

It was a few weeks later that my sister dropped a bomb on me.

I was sitting at the desk in my room, working on my homework, when Jenna slipped in behind me. She placed her hands on my shoulders and then slid them down across my chest, further, further, until her hands were in my pants and searching for my rapidly hardening cock.

"Mom's home, be careful," I warned her.

"She's making dinner on the other side of the house. Besides, I only wanna play with it a little bit!" Jenna said. "And I have something to tell you."

"What's that?"

She didn't answer right away. The fingers from both of her hands closed around my shaft, and she began to tug at it. Up and down the fingers moved, ever so slightly, not quite jerking me off, just teasing me. I squirmed in my seat, wishing she would go faster, but trying to be patient. Then, when I was just about to give in and start thrusting up against her hand, she leaned over closer and whispered something in my ear.

"I'm pregnant."

I froze, alarm bells blaring in my head. The surprise wilted my cock somewhat, but Jenna's strokes became more firm, the milking motion bringing me back to full attention. Still, I sat there aghast, trying to process this information until my capacity for rational thought returned to me. This wasn't really a surprise, I admitted to myself. We both knew we had been flirting with danger ever since we'd started fooling around; I'd even gotten off on it. It really had been inevitable.

Jenna was saying something else. "Mom's gonna be pissed. But I want to keep it. It's our baby together, Tim."

Her hands were moving faster and faster. She wasn't teasing me anymore, now she really was jerking me off. I'd fucked my pre-teen sister, impregnated her, and now here she was trying to make me cum in my pants as she broke the news to me. It worked. With a grunt, I thrust my hips up and blew a huge load. My head turned to the side, my lips finding my sister's, and we shared an incestuous kiss. When it was over, she withdrew her cum-spattered fingers and licked them off one by one.

"I'm gonna need lots of extra protein now, aren't I?" she said with a wink.

__________________________________________________________

Mom was, of course, beyond furious. She yelled and screamed bloody murder. But, eventually, she calmed down enough that we could have a family discussion on the matter, and when Jenna told her that she was going to keep the baby, she accepted it. The one thing we didn't tell her, of course, was that the baby was mine. I simply pledged by support and said that I would do everything I could to help.

The first issue was school. There was no way her middle school would allow her to attend while pregnant, and so alternative options were investigated. We finally settled on homeschooling, something that Jenna swore she was mature enough to do (I wasn't so sure, but I kept that to myself.) The more we talked about it, the more real this became to me: I was going to be a father. I had knocked up my sister.

It was pretty hot.

When Jenna's tummy began to poke out, I found the sight of it to be wildly erotic. It became almost inconvenient, popping a boner every time I saw my pregnant little sister walking around the house. To make things worse, she noticed my obvious reactions and began to tease me. When nobody else was around, she would roll up her shirt and saunter around with her baby bump exposed. I would walk by her room sometimes and see her lying there, rubbing her growing tummy sensuously. It was an invitation I rarely refused. Without a word, I would make a turn right into her room, strip her down, and pound her pussy until we both came.

The pregnancy made her hormones go wild too, of course. Her appetite for sex had already been high; now it seemed insatiable. Being the kind of brother that I am, I did my best to attend to her needs. I fucked my pregnant little sister every day after I got home from school, every night before bed, and often in between. She took every opportunity to remind me of her condition during these sordid acts, whispering (or screaming) in my ear that I should fill her swollen belly with my cum. She would go on about how she was the luckiest girl to be bearing her big brother's child. As the pregnancy stretched on and her belly got bigger and bigger, her pillow talk got kinkier and kinkier, until there was no line she wouldn't cross: as I stuffed my cock into her slit, she would rub her tummy and wonder whether or not it would be a boy or a girl.

"I bet you'd just love a little girl, wouldn't you Timmy?" she'd say. "A cute little daddy's girl? Would you fuck her like you fuck her mommy?"

At this point we would usually both cum. I never actually answered the question, but I was pretty sure she was serious about it.

The dogs got their share of loving during the pregnancy too; after all, I couldn't be available all the time. Whenever Jenna needed a quick orgasm, she would call one of them over, spread her legs, and let them go to town. This event came to be so common that, when our mother wasn't around, Jenna took to wearing skirts with no panties in order to give the dogs - and me - better access. The growing baby bump made actual sex with Max tricky, but Jenna was a determined girl. She would carefully position herself on all fours, usually with the aid of a large amount of pillows underneath her, and let Max mount her from behind.

One day I came home from school to find Jenna totally nude and spread eagle on her bed, with Max licking away at her pussy. She looked up at me with glassy eyes and beckoned me over. I took the invitation, unbuttoning my pants as I made my way through her room, and when I stood by the side of the bed and offered her my rock hard cock, she took it into her mouth and suckled it.

I ran a hand through her silky blonde hair and let my eyes roam down her body: her breasts, once flat, were finally beginning to puff out a bit, a change brought on in part by the fact that she was still a growing young girl, and also because of the pregnancy. Below the growing breasts was the much larger swell of her belly. She was five months pregnant by now; the big belly looked even larger in comparison to her petite 13 year old frame (her birthday had been a month ago.) She looked sexier than I could ever have imagined.

Max must have been thinking the same thing, because he had apparently tired of his pussy-licking and wanted to climb on top of her for a ride. The eager dog stepped over her and whined, his intent clear. Jenna didn't really feel like repositioning - a fairly complicated task in her current state - but at the same time I could tell she was burning for a fuck. Throwing caution to the wind, she reached down and put her hands on Max's back, urging him to mount her missionary. It would be a little bit tricky, with her pregnant belly and all, but as usual our lust overcame our reason.

The idea was incredibly hot to me, and so I reluctantly pulled my cock out of Jenna's mouth in order to help Max. With a little coaxing, the two of us got him into position, and then I helped guide his cock towards her swollen pussy. Pretty soon the horny dog was off, fucking her with animal excitement. His pace seemed fast, dangerously so, and I looked at Jenna.

Meeting my gaze, she reassured me. "It's okay. He's... not being too rough! The baby can take it. Ah!" Then she threw back her head and smiled. "Oooh, good boy Max. Do I look hot like this, Timmy? With our horny doggy all up on my belly?"

Max's body was sliding back and forth against Jenna's pregnant belly as he slammed his canine cock into her. Inside of her our baby was growing, innocent and oblivious to the depraved acts taking place around it. And when Max finally knotted his pregnant bitch, filling her with his seed, my mind went nuts. I imagined that his doggy cum was flooding into her filled womb around our child; maybe they would grow up to be a doggy-lover too?

It didn't work that way, of course, but the idea was too hot to let go.

I could have cum at a moment's notice, but somehow I managed to hold back. I waited there, rubbing myself slowly, until Max's knot deflated and he climbed off of Jenna. Then I immediately took up my position between my sister's legs, laying my palms against her belly and pounding her pussy until I deposited my own load inside of her.

With all three of us spent, I collapsed on the bed next to Jenna. She took my hand and placed it on her belly again, and together we felt the life growing inside of her; our child together. It was going to be a tough, crazy road ahead. But we loved each other, and we would travel it together.