Little Sister's Big Butt

Author's note: This is a work of fiction. All characters are eighteen years or older. Anal sex is a major theme in this story, so you might want to consider reading something else if you're not into that sort of stuff. Don't expect realism and you won't be disappointed when you don't find it! Enjoy!

*****

As his goofy smile broadened and his head lolled in relaxation against the couch's backrest, Tyler's pleasure-foggy gaze randomly traveled out of the living room through the flung open French doors and caught a glimpse of his swimming trunks floating placidly in the pool.

A chuckle escaped Tyler's lips as he exhaled in satisfaction and mused: "Why do I even bother with the trunks? I could just swim naked..."

Rather than diminishing or being paused, the wet slurping sounds that Michelle was making as she devotedly sucked her brother off continued, even when she attempted a reply while still bobbing her adorable face on his hugely swollen schlong.

"Mmhmphh uumph mmhmph mmh!"

As if the deep, loving blowjob she was treating him to wasn't pleasurable enough already, the vibrations that coursed through his sister's cock-clogged gullet as she spluttered out that unintelligible answer made Tyler groan in delight, causing his left hand to grab harder onto Michelle's majestic bubble-butt as the index and middle finger of his right hand sank deeper into the hot, seed-slick tightness of her lovely little asshole. Given their position on the couch, with him reclining back while she was snuggled head-to-toe by his side with her plump booty tilted up right before his eyes and her lips wrapped around his meaty dong, Tyler couldn't exactly read Michelle's facial expression to somehow guess what she had just said, or tried to. Still, his instinct told him that the gist of Michelle's dick-muffled words must have been something along the lines of 'That's what I said!'.

And indeed Michelle had said that, more or less, just a few minutes before, when she had joined her brother in the backyard by the pool.

After finishing his usual afternoon laps, Tyler had emerged from the cool water and was standing tall under the blazing summer sun, catching his breath and letting the rays dry off the droplets trickling down his sculpted frame. With his eyes closed and his face tilted up to the clear blue sky, Tyler had been startled by Michelle's sweet voice unexpectedly ringing out behind him.

"You could just swim naked, Ty," his sister had purred, her tone soft and giggly yet tinged with perceivable arousal. "You know I don't mind seeing your big dick, or doing stuff with it..."

Turning around, Tyler had been instantly thrilled to see his beloved little sis standing there on the deck in all her naked glory, smiling at him both with her gorgeous lips and with her beautiful green eyes. Michelle's long light brown hair were flowing across her shoulders and onto her fabulously big gravity-defying tits while her hands were resting on her juicy hips. That detail, along with the cute waiting pose she had struck, accentuated the round plumpness of her booty to the extreme, something Tyler appreciated even though his current frontal view wasn't exactly the best way to admire his sister's masterpiece of an ass. On the plus side, the fact that Michelle was facing him allowed him to ogle her pristine little slit and the glint of juices shining on her pink pussy lips, a sight that made his heartbeat accelerate as his breathing grew raspier with anticipation.

Despite having just been submerged in the bracing coldness of the pool, Tyler's dong had swelled and stiffened in no time inside his soaked trunks, his attraction for his sister and her breathtaking beauty managing to give him a raging boner in a matter of seconds. Chuckling while Michelle slowly strutted her way toward him, making her juicy bubble-butt bounce in time with the hypnotic swaying of huge jugs, Tyler had been quick to yank his trunks off and throw them dramatically into the pool as he smiled and declared: "You're right, Mimi. There! Better?"

On top of the pussy-wetting vision of his tall muscular body all beaded with trickling droplets of water and shimmering with youthful energy under the hot sun, the unveiling of her brother's fully erect monstercock pulsing with arousal for her had immediately set Michelle's crackling horniness ablaze with a vengeance. Urged by the undeniable need to feel Tyler inside her once again as soon as possible, Michelle had dashed forward and jumped right into her brother's strong embrace. With her arms thrown around his neck and her legs wrapped tightly around his midriff, Michelle giggled in delight as her lips locked with Tyler's in a deep wet soulkiss that got them both instantly crazy with passion.

The fleshy pressure of her big tits bulging out against his chest and the dick-hardening feel of warmth and wetness that her sweet pussy lips gifted him as his dong pressed against the silky outer folds of her slit had made Tyler groan loudly into his adored little sis's smooching mouth, but what had made his fat glans ooze glob after runny glob of precum against her soft tummy was the glorious sense of satisfaction that he got the moment he planted his hands on Michelle's big juicy ass and filled his palms with the awesome plumpness of her buttcheeks. Kneading and squeezing and massaging her bouncy booty, Tyler embraced his little sister tightly as she clung to him with her smooth legs and arms, meanwhile kissing him incessantly like her life depended on it. Horny as he was, Tyler only made it through a smooch-filled minute or so before he simply had to have Michelle right there and then.

Easily lifting her petite curvy frame up a bit more, holding onto her plump ass with one hand as he grabbed his raging horsecock in the other, Tyler had deftly aligned his pole so that his large cockhead was pressed against Michelle's puckered little rosebud, his broad glans poking and prodding at her twitching little butt-ring, ready to penetrate her anus. Right as he was about to thrust his huge boner into the eager opening of her lovely asshole though, Tyler had the presence of mind to pull back from Michelle's suctioning kisses and exhale with a groan: "Fuck, we need lube..."

Michelle had just smooched her brother deeper in response and wiggled her big booty excitedly as she wrapped her legs tighter around his waist, quickly dissipating his concerns with a purring giggle.

"Already taken care of, Ty. I'm all lubed up for you. Go ahead, push your big fat cock all the way up my ass!"

And that was exactly what Tyler had done. Thrusting up while letting Michelle slide down on his rock-hard boner, using a combination of force and caution that reflected both his raging lust and his tender love for his amazing little sis, Tyler had gradually slotted his entire humongous pole as deep as it could go within the warm, heavenly tightness of Michelle's narrow rectum, until her tautly dilated orifice was gripping and pulsing around the very base of his dong. The long, wanton mewl of anal ecstasy that had burst from Michelle's smiling lips once his horsecock was jammed balls-deep inside her asshole was more than enough to clarify her pleasure, but the increased feeling of wetness that spread from her virgin slit and drenched his groin with her precious nectar made it even more evident to Tyler that his sister was truly loving how his throbbing schlong was stretching out her bootyhole and stuffing her narrow chute full to the limit.

Buried to the hilt inside her forbidden hole, Tyler had gladly paused for a few moments to enjoy the velvety ripples of pleasure that coursed through Michelle's buttery passage and massaged his thick boner from tip to root. Then, as her head lolled weakly back so that her long hair was flowing freely across her slim shoulders, he had started pumping his hips and assfucking his sister's incredible ass with all the love and lust he felt for her.

Holding Michelle possessively in his arms and digging his fingers into the juicy, amazingly plump roundness of her buttcheeks, Tyler had synced the bucking of his hips to match the motions he imposed on her surrendered little frame as he guided her up and down along his pistoning dong, making each booty-skewering penetration doubly intense. Thrusting over and over into the snuggest, steamiest recesses of her slippery anus, Tyler had made it a point to cram his veiny truncheon balls-deep into his sister's cock-hugging rectum at every in-stroke while taking care to always leave a good half of his massive length cozily tucked inside her shaft-squeezing anal passage on the out-strokes, thus making Michelle squeal and cum non stop as she snuggled tightly in his strong, possessive embrace.

Synching flawlessly together, fusing once again into that shared sense of sensuous completeness that they never failed to obtain whenever they had buttsex, Tyler and Michelle had moaned in joined delight all through that spontaneous assfuck, which was their third anal coupling of the day but also the first one ever standing up. Only vaguely acknowledging that element of absolute novelty, much more interested in relentlessly immersing his raging horsecock all the way up into his sister's incredibly tight and sinfully warm anal depths, Tyler had taken particular pleasure in the animalistic, primal rush he got from sodomizing Michelle while holding her closely in his arms, the physical exertion inherent in the act indeed amplifying his sexual enjoyment of it.

The mind-boggling intensity of their buttfuck had certainly possessed a powerful rawness to it, which was made very clear by the urgency with which Michelle's arms and legs clung to Tyler's muscular frame while her huge rack was squashed against his chest and her whole petite curvy body was bounced up and down on his rump-impaling schlong. While her brother grunted and groaned in unrestrained delight, pumping his huge dickmeat all they way inside her indecently cock-hungry bootyhole without pause, Michelle had felt happily faint, overwhelmed as she was by the crashing waves of all the back-to-back assgasms that Tyler's frenzied butt-cramming rhythm was gifting her. Her anal-centric bliss had been truly enhanced by the deep-seated satisfaction of being held with such ease in the arms of her strong, beloved big brother, whose incredible ass-plowing monstercock was making her see stars and sending rivulets of her liquid pleasure gushing incessantly from her pussy.

Eventually, after Michelle's girlcum had thoroughly drenched his groin and her climaxing anal tunnel had suckled and tugged and caressed his recklessly thrusting schlong so much and so amazingly that he couldn't hold back his ejaculation any longer, Tyler had felt compelled to shift position and break the so far uninterrupted tempo of their standing poolside assfuck. To the sound of his sister's adorable sexy squeals and sigh-infused giggles, Tyler had rammed his fat sausage to the hilt inside her rippling rectum and left it stuffed in there as he marched across the backyard and into the house, only to instantly stop at the nearest wall and pin Michelle's back against it.

With the wall helping to support her, Tyler had gained all the added stability he needed to unleash the final booty-busting assault with which he meant to give Michelle a big brain-melting assgasm while also allowing his impending ejaculation to finally explode deep inside her lovely butthole. Horny as they both were and electrified by the mixture of lust and love that joined them so perfectly together, the siblings hadn't taken long to reach their respective and equally earth-shattering climaxes. Furious yet infused with the purest passion, the barrage of ass-plundering thrusts that Tyler let loose on her twitching little anus had sent Michelle into orbit, making her scream rapturously while wave after merciless wave of anal-centric bliss crashed into her with the very same breathtaking force of her brother's balls-deep slams.

Of course, Tyler's rabid butt-busting blitz couldn't last too long, but its ending had marked a new pinnacle for his own and his sister's shared anal pleasure. As he howled in release, Tyler's ejaculation had erupted with deluging force from the bloated tip of his fully buried monstercock, hosing Michelle's dick-squeezing chute with rope after massive rope of cum and triggering an assgasm so epic that her vision flashed white and she pretty much passed out on the spot, her slack limbs still wrapped around Tyler's sculpted body, her twitching and insanely crammed bootyhole filled to bursting with throbbing dickmeat and warm, brotherly seed.

Equally ecstatic, Tyler himself had almost been undone by his own climax, his muscular legs shaking from the sheer intensity of his release, his enormous schlong all the while flexing and spewing more and more creamy sperm into the deepest, snuggest depths of his sister's buttery bowels. In a daze, a dangerously light-headed Tyler had managed to gather his wits enough to stumble over to the couch, where he let himself crash down on his back while holding his squealing, cock-impaled sister still locked in his affectionate embrace.

After enjoying their post-orgasmic haze snuggling together like that, Michelle had emerged from their shared languid afterglow first while Tyler's eyes still remained closed and his endorphin-flooded mind kept floating lazily away, much like his discarded trunks were doing in the pool. In his groggy state, Tyler had merely smirked and exhaled as his giggling sister deftly unstraddled him, thus letting his unyielding horsecock escape the silky grip of her sperm-filled anus with a lewd slurping sound, and then turned around as she knelt by his side, titling her epic bubble-butt up in his face as she lowered her gorgeous mouth down to his groin and started lapping and smooching and sucking away on his huge, cum-coated shaft.

Lying on the couch and slowly emerging from his post-ejaculatory buzz, Tyler had been delightfully surprised when Michelle started giving him a sperm-scooping blowjob. What had made her oral attentions even more enjoyable were the 'conditions' that Michelle had 'imposed' on her cocksucking ministrations, namely her demand that Tyler should meanwhile push his oozing seed back into her anus and force it to stay in there until her gummy pink butt-ring tightened fully closed on itself once again. That made Tyler's smirk broaden even more, causing him to rejoice in his sister's playfulness and how well it suited her, especially in sexy contexts.

Now, mere minutes after pumping another prodigiously abundant ejaculation inside Michelle's ass, Tyler was still feeling blissfully hazy. And it wasn't just an understandable overload of post-buttfuck delight that made his head spin, nor the fact that he was comically proud of himself for having hosed the warm, dick-milking depths his sister's incredibly snug anal chute with such a huge batch of his thick cum for the third time that day. No, the persistence of Tyler's pleasantly dizzy state also had a lot to do with the tender, genuinely sisterly yet deeply slutty way in which Michelle's mouth and lips and tongue were sucking and slurping on his cock, blowing him amazingly as she feasted on whatever residual trace of cum she could lick off him or coax from his beefy balls.

And then, of course, there was Michelle's dick-muffled reply to his comment about how unnecessary it was for him to wear trunks to swim, a reply that excited Tyler exactly because it was given without regard for clarity of expression but instead with absolute devotion to the act of sucking his cock, with Michelle's lips remaining hungrily wrapped around his dong to emphasize one more time just how much she lusted for his fat sausage. Somehow, that naughty detail made Tyler's heart swell with love for Michelle, even more than usual. Feeling both horny and fluffy inside, Tyler chuckled to himself as he commented on his dick-gobbling sister's cock-muted words.

"You know, Mimi, you really shouldn't speak with your mouth full," he said in an obviously teasing, mock-reprimanding tone. "That's not very lady-like. Or proper. Or that kind of stuff."

Despite her recently discovered and frequently practiced cock-inhaling skills, Tyler's comment almost made Michelle choke on his massive pole. Gagging and spluttering, she raised her head from her brother's lap and let his fat saliva-coated boner slide out of her mouth until her lips were gently kissing his big spongy knob. Then, still stroking the broad base of his shaft with one dainty hand, Michelle turned her head while tucking a rebellious lock of her long hair behind her ear and looked over her shoulder, until her sparkling green eyes met Tyler's gaze.

The siblings didn't even have to verbally clarify to each other how insanely hilarious it was for either of them to mention 'proper' and/or 'lady-like' stuff, given both their present situation and the fact that they had been having incestuous buttsex any time they could for days now, loving every second of it and feeling more in sync with each other than they had ever been. Because of all that, as soon as their eyes met, Michelle and Tyler burst out laughing.

"Oh, I'm so sorry, Ty," Michelle eventually replied in a joking and dramatically contrite tone, all the while sensuously brushing her smirking mouth all over the smooth fleshy tip of his monstercock, thus applying his precum to her lips like it was the sexiest, lewdest of glosses. "How rude of me to keep sucking your big dick while I talked! Should I stop blowing you?"

"Nope, never stop blowing me, Mimi!" Tyler was quick to blurt out, still chuckling along with her. "You're just too good at sucking dick, it would be such a loss if you stopped!"

"Aw! That's so sweet, Ty!" Michelle purred, adding just the bare minimum of sarcasm to her genuinely appreciative acknowledgment of her brother's naughty compliment.

Moments later, Michelle's pretty head was once again bobbing on Tyler's huge boner as his fingers resumed their slow sawing motions in and out of her clingy sphincter, which was still nice and slippery with cum even though it had all but returned to its usual tiny, tightly puckered shape. Totally caught up in their respective post-assfuck activities, the siblings were startled when the sudden chiming of Michelle's phone intruded into the mingled sounds of their labored breathing, lustful slurping and dick-muffled moaning. After they both turned to the coffee table to their right, Tyler slowed down his ass-fingering tempo to a stop while Michelle let his thick length slip all the way out of her talented mouth so that she could sit up straighter on her knees and reach for her cell. Still devotedly pumping a dainty hand up and down along her brother's big spittle-glinting truncheon, Michelle read the text she had just go and promptly informed him about it.

"It's Mom. She says she's gonna be late for dinner, but if we're okay to wait a bit she'll bring Chinese."

"Sure, okay," Tyler shrugged dismissively, meanwhile shifting a bit so that he could keep kneading Michelle's epic bubble-butt and fingering her adorable little asshole even now that she had repositioned to sit up on her knees. "How late are we talking about here, though? I'm already pretty hungry."

"Late enough..." Michelle murmured in a singsong, weirdly suggestive tone. As she turned to look at Tyler, he noticed that her cute face was flushed with arousal, her big boobs rising and falling enticingly in time with her excited breathing. An impish grin was dancing on her seed-glossy lips as she brightly exclaimed: "That means we have time, Ty! We can do it now!"

"Do what?" Tyler asked with a puzzled expression. Within moments though, the playful wink that Michelle gave him while impatiently biting her lower lip and raising her thin eyebrows managed to turn Tyler's perplexity into bug-eyed surprise. "Oh, that! You mean you really wanna do it? Now?!"