Brother-Sister Attraction

Story by EmoCat on SoFurry

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I AM OPEN FOR COMMISSIONS! TO ENQUIRE PLEASE MESSAGE ME ON FURAFFINITY!

Love is still a foreign experience to me. That probably shows between the lines here.Big new story coming soon. Enjoy!


"We're just ducking out to the shops for a few things! Won't be long!"

Kena looked up from one of the many games filling storage on her phone. Another typical occurrence on an uneventful summer Sunday: one or both parents heading to the local supermarket for items invariably forgotten during Saturday's primary visit. An impromptu inventory list appeared in her mind, categorising items a typical 17-year-old girl would desire from the store.

Snacks? Plenty stocked in the cupboard- oi, none of that! I'm meant to be watching my figure!

Batteries for various appliances and controllers? There'd be some spare in the electrics drawer. Alright, what about makeup?

A few strands of deep blue hair remained intersecting the brighter pillowcase as she craned her neck to assess her stockpile. Across the room, a simple wooden dresser stood as a solitary display case for various knickknacks (but only what wasn't too embarrassing to be reminded of). Upon one shelf lay various makeup utensils her gaze had been seeking; most importantly, two stubby tubes of her favourite black lipstick.

Yep, she was sorted. The near-adult shark's close proximity to the front door meant there was no need to rise further from the pillow in order to respond.

"Okay, see you soon!"

Particles of fragrance dotted the air with a light whiff of shampoo as Kena's head returned to its crook upon the pillow. Before resuming the mobile game, however, a twinge of curiosity prodded at her mind. Something had been missing from the exchange just past; something inconsequential, but so common it seemed unnatural to be amiss. Aha, that's it: where was the soothing baritone of her brother's voice to harmonise in responding to their departing parents?

The scarcely perceptible hum of running water working its way through the dwelling's hidden pipe system was a convenient hint. Erebus' shower time had seen a recent increase in correlation with his gym attendance. This summer break being the first post-high-school, he'd wasted barely a day in spending the excess of free time improving himself physically, now that his mental embellishment had concluded.

He'd not have heard their call over the thunderous torrent of drops lashing his body as the sweats of labour swirled to their demise down the drain. There always seemed to be plenty of sweat whenever Kena was lucky enough to catch him coming home. She would sometimes come face to face with a slight hint of his body odour, the cat's pecs right at eye level and above that a grinning mouth opening to thank her for answering the door as he'd forgotten the house key yet again.

Yes, his perfect pecs and biceps which look like they grow larger with each coming day, and his bulging thighs and calves which transport him without fail, and the toned stomach defined to the millimetre by his tight gym clothing, and his...

Stop it, Kena.

She knew better than to drool over her brother's flawless physique, especially since the warming afternoon sun would be well below the horizon before the image of sweat dripping from his chiselled jawline grew tiring. It was immoral, wrong, and besides, all those thoughts (along with many more) were best bundled up and stored away for a sleepless night when her little silicone friend would come out to play...

Alright, enough!

The shark sat up straight in a single jerky movement, fixing her head forward as if to leave those thoughts behind on the pillow. There would be no better time for a distraction. Every object in her room was of great familiarity but still Kena visually traversed the contents seeking an alternative form of entertainment. A minute of scanning passed before her eyes finally tracked across a curiously-shaped black device with two joysticks, an array of buttons and SONY imprinted upon its midsection.

Perfect!

A plan was hastily construed: she'd temporarily sate the lustrous desires by exposing herself directly to the source, one which would no doubt greet her with a friendly expression inviting her into open arms. Erebus' room was a hub for activities suited to burning away the hours as it was home to the family's hardy Playstation. What better way to sterilise her taboo ideals than an innocent pastime?

Stowed away beneath the dresser upon which the console and connected monitor were situated was a vast selection of games, though the siblings often tended to revert to their favourite racing game. The cat's affinity for power always trumped her love of the more quaint vehicles on offer, but hours of fun and many good memories would be made regardless.

I wouldn't mind taking the victory for once. Today the Red Bull X2010 will be mine. I want to take a risk.

Initiating the activity, of course, required making the quick journey down the hall to her brother's bedroom. This she did with controller in hand, having dressed modestly in tight denim mini shorts and a simple tee which had previously molded to accommodate her remarkable developing bust.

While still in the process of maturing, Kena's curvy figure had often been a source of eye candy for some particularly disruptive male pupils at the school both siblings attended. Consequently Erebus was occasionally required to interrupt unsolicited encounters; his impressive build was properly suited to the protective elderly brother trope. For this she was always appreciative, sometimes rewarding him by departing with a sly wink and a subtle strut in her step. After all, he was a teenage boy just like those he needed to deal with.

The wooden floorboards paved a direct path down the familiar corridor, one so well-trodden that the peculiarity of the graphic artworks adoring the walls on either side had long ago faded. This time, Kena forced herself to note the decorations, latching upon the opportunity to occupy her mind with something other than Erebus' natural build and gradually billowing muscles.

Circles. Squares. Black. White. Colour. Paint splotches. Flower in the corner. Controller in my hand.

The selective attentiveness, however, would soon prove to offer good fortune in a way she'd never have imagined becoming reality.

Kena's bare feet carried her undetected, as her light frame and lack of height saved the suspended walkway from creaking. Another painting by the entrance of their parents' room adopted a role as anchor point for her eyes once the side walls' features of interest were left behind. Its convenient placement allowed the girl to keep her head straight both literally and figuratively, as she retained intent on suffocating the intrusive ideas.

This rigid stream of thoughts meant that the door to her brother's room was suddenly within reach. Kena pulled up immediately, almost having overshot the destination. The amount of sound from within matched that of her footsteps, suggesting the room was unoccupied and she would be free to set up the console. In fact, an indistinct niggle popped up in the back of her mind; there should've been some sound, but its nature wasn't immediately obvious.

Having permitted her gaze to abandon the painting at corridor's end, she looked left to where the polished modern doorknob practically beckoned her touch as if it were calling out for attention. Kena's focus was instead drawn a moment later to an inexplicable flicker of light reflecting from somewhere down the hallway. Each family member was used to sunlight breaching the upper floor windows on either side of the house, its wholesome beams illuminating a jagged pattern onto various surfaces, but the glint she'd spotted was unusual.

Deliberating for a couple seconds but coming to no plausible explanation, she shook off the moment. It was time to return to the task at hand, the cold plastic leeching heat from said hand like it too was in need of attention, and that it would receive once the duo settled in. Gaming sessions would often last for hours, especially now that neither had the overhanging responsibility of schoolwork.

Both siblings had, over time, become treaty to an unspoken pact by which one would call the other's name if entering their room, but was it really necessary in this circumstance? He'd been in the shower a minute ago - there couldn't possibly have been time to finish washing, towel off and change. Confident in this notion, Kena took another soundless step forward into the doorway.

The girl pulled up short again. Where she'd expected to see a large, somewhat unkempt bed situated neatly in a corner, its bottom end pointing to a multifaceted desk on which every level lay clutter and an acoustic drum kit at its side, the gleaming white door mostly obscured the scene.

Had she not been so keen to alleviate any incestuous ideals, it would've been clear to see that things weren't quite adding up. The door was open earlier, something was amiss in the hallway, and that persistent nag insisted there was an element missing from the scene. Alas, Kena remained unaware of the discrepancy and so pressed four neatly trimmed nails against the door to continue.

With nothing but a light push, it began the glide around, revealing in increments the picture she was anticipating. As ever the bedside table accompanied an abstract Pink Floyd poster in giving the bed's nook a bit of character, then glass doors leading out to the road-facing patio came into view. Next would be the wardrobe where Erebus was standing naked, angled towards the glass doors while sorting through his various shirts, then the desk-

Kena's unoccupied hand flew to her mouth as she barely managed to suppress a gasp. Was this real, or was she still in her own room having fallen asleep while thinking about him? A twinge of pain from her other hand subconsciously clamping down upon the controller confirmed the truth. All of a sudden it seemed like the room was a thousand times larger, the sun's glare magnified by every vertice to become blindingly strong, and the weight of her clothes simply vanished as if she might float away.

Amidst the flare of emotion, the clues began to piece together in completing the scene. The glint which had earlier caught her eye was where shower water laid stagnant upon the hallway floor. Erebus' towel was splayed across his desk, suggesting he'd dried off where he now stood having forgotten to bring it to the bathroom. That also explained why the cat moved from shower to room so quickly, and why his eye-catching figure was fully exposed. The teenage boy's admirer would have nodded to herself were she not fixated on the unprecedented sight.

While before she could only speculate as to the unobstructed view of Erebus' body, she was now faced with the real deal in the flesh - and oh, was the flesh mighty. From the top down he was abundant in muscles only beginning to access their full potential, his protruding shoulder blades channeling her gaze downward to the crook of his toned back.

The cat's buttcheeks were trim and perky but more importantly the thighs below were of similar muscularity to his top half, their thickness almost matching hers but containing much more compressed power. Perhaps not most attractive but possibly most impressive were the bulging calf muscles upon which his movement relied.

When it came to the question of most impressive, however...

Erebus' body was covered in a plain of grey fur, decorated with minimalist markings such as the occasional stripe around his biceps. Topped with a flourish of near-black hair, the boy's natural greyscale palette wouldn't necessarily stand out in a crowd, but one body part was close to blending in with the surrounding walls. Not having laid eyes upon this feature before, Kena's full focus was quickly commandeered.

His cock. A fat white shaft cheekily peeking out from behind the closer thigh. The head was partly obscured but not enough so that the eavesdropping sister couldn't discern its approximate size by the way its curve continued two-thirds of the distance to his knees. Dangling limply, its commanding presence begged for deserved appreciation. A few thick streaks of black indicated the presence of unstimulated veins, running lengthwise down the shaft and crisscrossing at the bulging glans ridge. She'd never even conceived a dick could be so large, let alone attached to her gentlemanly teenage brother.

Oh... my... god...

Within moments of visually appraising the monstrous member, the naughty desires she'd tried so desperately to evade returned in full intensity. An onslaught of questions - some previously considered but most from a brand new arsenal - and their respective fantasies cooperated to overwhelm her conscious. How would it feel? Would it get bigger? Was it heavy? How would it taste? Did he know how to use it? Would he be willing to use it?

It's... I... ouch!

The hand which had slapped over her mouth drew away as if stung, revealing a tiny gash on the index finger. Being a shark, it was imperative that Kena learned to take great caution regarding her sharp teeth during childhood. The sudden inhibition had thrown all such caution to the wind, in such a manner that her finger had worked its way under her soft lips, consequently giving her a taste of blood.

The moment had sent her tumbling back to reality in which Erebus hadn't spotted the intrusion despite her voluptuous frame blocking the doorway. She needed to think, and quickly. This may just be a once in a lifetime opportunity to sate those burning desires, to appease that passion deep within the cockles of her heart. There were many preparatory steps and checks required to safely undergo this hasty operation, none of which could be completed in the little time Kena had to make the decision.

She couldn't just barge in and make the proposition, surely? The danger of deterring him, potentially for good, with a poorly-conceived advance was too high. On the other hand, too passive an approach would supply ample time for the cat to dress at least his bottom half, increasing the complexity of making a move tenfold. From the ethical standpoint she ought to return the door to its original position and walk away. Even a hunk reserves the right to privacy.

Oh, what do I do, what do I do?

Something brushed against her lips. Lost in careful, hurried deliberation, Kena's free hand had raised to her mouth for a second time. She jerked it away again.

I have to do it. There'll never be a better opportunity.

One foot lifted from the floorboards before hesitating and returning to place. The weight of her decision, the implications and possible damage their relationship could suffer suddenly weighed down her heart like a ton of bricks. Whatever resulted from these imminent illegal events, the last thing Kena wanted was for a rift to form between the siblings.

Her gaze drank in the rippling muscles, then strayed south to that gleaming third leg beckoning from between his thighs. As if some supernatural third party had made the decision for her, an automatic yet delicate step took her forward, crossing the threshold from wooden hallway to carpeted bedroom. Perhaps the centimetre of softness would cushion her fall if it all went wrong.

I'm gonna take the risk.

Mere metres now separated the two. What followed this engagement would be either memories of giddy pleasure and unbridled ecstasy as her deepest fantasies were fulfilled, or the devastating experience of a crushing rejection; either way, family dinners would never be the same. Her heart pounded as if it might burst right out of her chest. Gentle bristles tickled Kena's feet as she continued encroaching ever so cautiously, riddled with equal measures doubt and determination.

An entirely unsuspecting Erebus' neck was craned down, rifling through a clothing stack in search of a particular tee suited to summer lounging. Perhaps residual water from the recent shower lingered in his ear canals, or he was lost in thought - not an uncommon occurrence for the man whose physical maturity hadn't yet caught up with the mental. Regardless, it was surprise with which he whipped around, pivoting in place to identify whomever's hand suddenly came to rest on his shoulder.

While expecting the instant reaction, Kena failed to foresee a hand of his own reaching up to grasp her wrist faster than a rabbit. This time her gasp wasn't withheld; a muffled thud signalled the controller's drop to the floor. The cat naturally towered over her by about a foot and up close, the piercing glare of his deep blue eyes seemed to burrow into her skin with laser intensity. It only took a moment for Erebus to assess and identify the intruder, for whom the tense non-verbal exchange felt like an hour.

"Kena," he began. The caring baritone carried no hostility, only betraying concerned caution at the unannounced rendezvous. Fortunately for her, his gaze and grip on her wrist eased up in concurrence. Something unusual is happening here, Erebus thought; in case of an emergency he would be the first port of call while their parents were out. Lifting her hand from his shoulder, the trickle of crimson immediately caught his eye.

"You're injured..."

"No no no, it's just a scratch, I'm fine, really!" Kena's stammer worked its way out from behind a meek smile in hopes of dissuading his concern. A subsequent awkward chuckle only reinforced the questionable integrity of her response, and the duo's eyes met again. She should've known his disquiet wouldn't be quashed so easily.

The cat's fur felt so much like the carpet upon which they stood together, one of his few physical aspects she still had yet to be familiarised with. Barely ever would the contact last this long, let alone be sustained with considerate tenderness. A peculiar tightness in her chest along with an obvious thumping indicated the rise of her heartbeat. His blue peered into her gray while her blue was held by his gray.

It was so wrong to feel this attraction but in the moment he couldn't be any less perfect. The emotional intensity of their close proximity wasn't lost on either party. Heated breath pinballed back and forth, one looking up and the other down. Mutual affection coated the scene as if it was preemptively stored in a leaking bucket over their heads.

Erebus was her brother and though their arguments weren't in short supply during early teenagehood, the familial bond was undeniable. Now he had developed into something more, a kind, fit, handsome young man whose maturity was advanced well beyond his age. Each time he stood up for her, supported her through heartbreak and the occasional loss of their nearest and dearest - no instance was an act to impress other girls or the 'rents or satisfy some unmentioned moral complex, this was in his true nature.

As fit, he was a man; a man with something else developed well beyond his age. Kena's gaze tracked downward, immediately followed by his.

"Oh, shit, uh..." The feline's cheeks flashed red. The sudden turn of events had distracted him from the preceding task and consequently, he remained exposed in full view of his sister (not that she displayed any signs of deterrence, for some odd reason). In one fluid motion her wrist was released. Erebus' head turned and his freed hand flung out to the right as if performing a corny disco dance move, scrabbling amongst the layers of clothing in search of something with which to cover himself up.

Kena smiled inwardly, both in relief that he hadn't instantly pushed her away and modest amusement at the nonsensical splutter which formed his actual reaction. Despite all the charm he can be such a goof sometimes.

"Erebus."

His frantic search halted, instead prioritising assessment of the dulcet tone she'd never previously applied, at least in his direction. It was with apprehension that his line of sight panned across, departing the hopelessly messy clothes and the adjacent wall, managing not to squint at the patio-reflected sunlight as he scanned over the empty driveway outside, and ultimately coming to rest on the two enormous breasts Kena's lifted shirt had released. The cat wasn't the only offspring to carry a healthy dose of good genes.

"Please... let me have this."

Erebus picked his jaw up off the ground, not realising it had dropped like a ton of bricks. His own sister was flashing him, reciprocating the exposure as if they were replicating that one scene from Waterworld. Her chest melons were only one component of her remarkable voluptuousness of which Erebus had previously taken notice. On beach trips he'd don a pair of baggy, faded boardshorts to conceal what would otherwise create a hugely conspicuous bulge, but his sister carried no shame in stripping down to a skin-tight bikini right there on the sand, even if there was no-one around but him. In fact, the cat recalled, she seemed to act out the undressing with greater gusto if she knew he was watching.

Never had he expected this warm summer's day to change their relationship forever. He was transfixed on the sight as if the attraction was magnetic. Falling free from the shirt had provided the terrific tits with momentum and they were just now coming to settle, having bounced back and forth like a set of weighty conkers. The pale mounds were capped with two pink discs, slightly dappled in contrast to her torso's regular smoothness. While they came to rest under his mesmerised ogling, however, the perky nipples began to droop. Her entire chest appeared to be sinking!

What is going on? Is this all a dream? My sister- oh.

One of Kena's knees sunk into the carpet, only moving vertically so that she wouldn't be drawn any further from the flustered hunk. This brought her just inches from the dangling heft between his legs, though her eyes remained in contact with his. Erebus had been swayed and she knew it; not by a heartfelt confession of pent-up adoration, but by the increasing prominence of the wide veins wriggling across his length.

To an uninformed spectator, Erebus would at this point appear a blustering, muscular meathead whose only interest was in the exposed curves of a woman's body, but Kena knew better than that. It was even cute how his normally sensible manner had been upturned so; in such extenuating circumstances, however, it could be excused.

Erebus' claws dug into the random fistful of accumulated clothes as his sister's slender digits took hold of his shaft. She held the position for just a moment, enough time to initiate visual appreciation as well as physical. Up close it was even bigger than she had realised: at least nine inches of hot, pulsing flesh topped with a mushroom cocooned within tight white foreskin. More impressive than its length, though, was the almost unfathomable girth. Those fingers spread over about half of the shaft but they weren't even close to covering the circumference, which seemed to be expanding and stiffening with every passing second.

If this is genetics, I suppose it explains why mum would be walking funny whenever they returned from a private getaway...

The immense weight in her hand was a stark contrast to the light plastic controller she'd brought into the room, but she knew which toy she'd rather play with. Every inch of the huge flaccid sausage was an opportunity, an electric shock, an intense moment of screaming pleasure where he had so much to give. Those fantasies she'd entertained during many a lonely, sleepless night came clawing to the surface; realistic as they were, nothing compared to having him literally in her grasp.

Though winter was a good several months away, its excessive warmth seemed to draw her in. The noticeable absence of musk - my brother's raw, masculine musk, god this is so wrong but I can't get enough of him - was understandable seeing as he'd just finished showering before she made the unannounced appearance. A mild disappointment, admittedly, but nothing that couldn't be rectified with deliberate application of another sensory receptor.

"It's so fucking big..." Kena whispered, invisible particles of her heated breath splashing off the tender surface. Husky tones conveying a genuine awe in her voice matched the lust infiltrating the visual lavishment of the member.

Erebus saw her head dip as if undertaking some alternative method of pinching herself to confirm this was really happening, then raise again with her unused arm in tow. Reaching toward his crotch with a closed fist parallel to his length while retaining grip around his girth, the awe seemed to compound.

"And it's thicker than my arm..."

Every time a shake of her hips caught his eye, every time she bent over while doing chores in his vicinity, every little tease here and there hadn't gone to waste. All of her fantasies now seemed within reach, the opportunity handed to her on a silver platter. She would have the privilege of breaking her brother in - that is, if his massive dick didn't break her first.

The empty fist opened and moved to steady itself on his thigh. With that, it was time to play.

Erebus withdrew breath through two rows of gritted fangs as his foreskin was mostly retracted, not without some difficulty as the preceding events had caused a modest swelling of the dark glans. Its movement was assisted in part by the natural translucent lube which had come to glisten across the tip. This was just icing on the cake for Kena, whose tongue lolled out like that of a dog longing for a pat.

Kena was practically drooling over the meat in her hand but comical as it was, the saliva was of great use as her tongue snaked in, spooling precum from the tip before dragging upwards to delve under the foreskin. The flavour burst was instant, both fluid and flesh blessing her tastebuds and proving its taste achieved the mighty feat of outperforming its looks. The bulbous glans throbbed under her tongue in response. A pulse travelled down the length past her hand, releasing a fresh globule of pre which she lapped up with eagerness just short of a frenzy.

On the receiving end of the worship, the cat could barely comprehend his sister's dedication. As her oral muscle slathered his head, his fingers twitched with each spark of pleasure coursing through his body, toes curling into the carpet and claws on one side poking holes into the clothing they constricted. Though he was just about drowning in the bliss of having his sister slave over his impressive member, the teenage boy identified the beginning of a discernible pattern with which she worked away.

No sooner had he begun following this rhythm, however, than it halted abruptly and she let go of the shaft. No explanation was provided save for a gasp but all would soon be revealed.

While Kena was dutifully servicing the monstrous meat, an additional length equivalent to the average size for men his age had been tacked on out of nowhere as his blood rushed south. Even at half mast the entire member now loomed over her, the change in perspective forcing her eyes to finally abandon the delicious spectacle. Past her previous focus hung what was his only feature to have remained obscured from her gaze: the scrotum.

These carried an imposing aura of their own, matching his dick in ridiculously excessive proportion. Each ball dangled like a baseball in a short furry sock corresponding to his primary colour palette. The titanic testicles were simply massive, so much so that Kena's hands had to settle for only cupping part of each, for they were outsized. No doubt her brother sported the production to match the muscle.

Her adjustment left Erebus briefly devoid of sensation but a light squeeze from her delicate fingers more than compensated. If the preceding enthusiasm was anything to go by, she was probably attempting to milk him as if the hefty nuts in her grasp oozed liquid gold. A murmur from above served as unnecessary encouragement. Worshipping the stud's body, in particular the mighty package it accompanied, was rewarding enough without the knowledge that he was experiencing similar bliss.

A keen moistening of the shark's lips, her tongue still carrying his pre atop the saliva layer, prepared them for the next advance: orally savouring the heavy hangers. There was so much surface to cover, so much attention they deserved. Shifting her hands down to where the scrotum rounded out, an outline of her lips lay where black lipstick met the fur.

When on earth did I put on that lipstick? Well, it's a good look anyway. Maybe he likes it too.

Two more imprints followed in quick succession, tattooed on with gentle contact transferring every iota of love she could muster. The testes seemed to twitch in her hands like they wanted to return the kisses. Her brother's cleanliness meant their taste left a little to be desired, though that was no deterrence from the unfaltering servitude. She took to slathering the balls' light fur coating in the drool they'd incurred, careful not to smear the lipstick marks as her face drew closer. Wrapped around the scrote like ribbon around a Christmas gift - it sure felt like Christmas, at least for her -

"Kena, enough."

Without properly registering the nature of the comment, a shiver of fear struck Kena's heart. Was she being too creepy with the attention unreservedly offered? Perhaps he finally came to his senses or morals got the better of him. He'd never even consented! After so long, had she totally blown the only chance there would likely ever be?

After a moment's thought, the fears' irrational nature came to light. Erebus' words were commanding yet his tone caring; no coldness, only kindness, beckoned her up to a standing position. His member lolled half-mast just short of her thighs, its slick head nearly matching her sloppily imprinted lipstick in colour. Call though it may, the tantalising meat would have to wait.

The cat drew her closer. Their shared oxygen was rigid with the moment's vibes of sexual tension.

"There's no use in degrading yourself like that." That baritone could emphasise the sensuality of any comment.

A blush lined the tops of her cheeks as they were lifted by a shy smile. "Sorry, I kind of got carried away, heh heh..."

"It's pretty clear where your interests lie. You're not as quiet as you think with that toy, y'know."

Kena's jaw dropped, her smile leaping to his face instead. She went redder than a tomato. At this, a hearty burst of laughter erupted with full force.

"I'm just messing with you, sis! Though that did answer a question I've had for a while."

The girl looked away. This embarrassment is probably worse than Erebus' when I caught him naked. A gentle furred hand then reached up to straighten her jaw, like he knew that she was now riddled with the torment of regret and wanted to correct the thinking.

"We're nearly adults. Fair time to have a little fun."

Kena's eyes flung open, only to then flutter closed with relief as the cat's lips planted themselves on hers. Despite the age similarity his head needed to dip to reach her, but the initial awkwardness made it all the more authentic: their young love verified in an opportune rendezvous, passion swapping back and forth on their tongues. The young man held a genuine compassion for the sibling with whom he'd experienced the world and was keen to access a whole new treasure trove of experiences in whatever followed this fateful meet.

His fur tickled her scales as a slight murmur escaped the girl's lips beside the contact. Neither had their eyes open, for the sheer enthusiasm was sufficiently conveyed in the heat and pressure behind each kiss. No longer needed to hold her head steady, Erebus' hands traced her figure as they slid to rest where her hourglass figure began widening.

Both thumbs poked beneath the upper denim hem of her mini shorts, creating an inch of space on either side. The step-by-step process by which the siblings broke these taboo boundaries had to be undertaken with caution. In a strange way the act of declothing her bottom half held similarities to how, with great delicacy, she'd accessed the private square by unwrapping his package.

Blind handiwork and a little wriggle of the girl's hips gave the lower clothing room to drop, flopping silently onto the carpet below. Her underwear followed shortly after, the cat's keen fingers caressing the cool black lace for a few moments before dragging it downward with ease. Much like the saliva passing from tongue to tongue, a string of juice from Kena's moist sex clung onto the panties for dear life as the two ends were separated.

While their mouths mingled with increasing intensity, the earlier pleasure hadn't been forgotten. Kena couldn't hold back a giggle between smooches as a telltale warmth rubbed its way up her inner thighs, easily long enough to poke out behind.

"Mmf!" Claws suddenly digging into where his hands had returned following her undressing indicated the squeeze of her plump thighs around his shaft had had the desired effect. His face withdrew from hers with a giddy grin; it was time their relationship ascended.

"You're such a tease. Don't think those bikini shows went to waste."

"So, I take it you want this?" Her words' sultry undertones betrayed the lust which instigated the scene.

"Why, you seem so keen, how could I deny you the pleasure?"

Kena's face lit up with a beaming smile. Her brother's hands depressed an area of skin directly beneath her butt and before a second had passed she found herself hoisted in the air, feet dangling aimlessly like the man's junk prior to receiving her special attention. The natural excitement of imminent intimate interaction brought a second giggle to the surface, harking back to the 'girly girl' stage grown past years ago.

With a deftness (and indeed compassion) uncharacteristic of a stereotypical muscle-bound teenage lad, Erebus took mere moments to swing around and gently place her back against the wall opposite the closet. Kena's arms flung around his neck to keep herself upright during the spin, not that there was any cause to doubt his strength.

Sunlight arcing through the glass doors beside them threatened to harm the shark lady's eyes but her guardian wouldn't let any iota of discomfort marr the enjoyment. Like specks catching on a feather duster, tufts of fur around his face reached out and clung to passing particles of light, gifting his periphery a wholesome golden glow. That combined with an adoring smile painted a picture of the cat in the way she'd always perceived: genuine good.

A quick adjustment brought the siblings' heads level where their eyes again sought comfort in each other's. The silicone toy buried in a box of goodies beneath Kena's bed wasn't nearly large enough to prepare her for the man's hulking sausage, but for all the intimidation in the world, there was no need to be afraid. Wrapped up in her brother's muscles, Kena had no doubt his acceptance of the advances involved no ill intent. He knew that monster meat would require plenty of time to accommodate and would heed her will accordingly.

Friction formed nary an obstacle where their moist genitalia met, his near-black glans knocking on the door of her white folds. No more needed to be said, just the two of them gleefully anticipating the final plunge for which the member now aligned itself. The heat and the elation and everything the girl wanted as the sun enshrouded them like this moment was destined to be.

With utmost caution, Erebus' hips crept forward, just millimetres at a time. The love in his eyes anchored the girl, pressed tight against the wall but soon to be swept away with ecstasy. The fat cockhead kissed her entrance as if checking it was safe to proceed before spreading her skin wide to poke inside. An further inch of dark flesh followed before bumping up against the glans ridge and pausing. They had crossed the forbidden threshold together.

Though only a tiny portion had penetrated her nethers, fireworks exploded in every compartment of Kena's brain. Her refined nails dug into the muscle forming the man's shoulders, gripping with such intensity the skin could've easily broken. Perhaps she thought she was digging through sand in search of way of comprehending the indescribable sensation.

The cat's bulging biceps showed no sign of strain for the minute they remained in that position, pressing their foreheads together early on as she struggled to loosen up for the hot head. She was the first to draw back, a light panting indicative of the outstanding courage her endeavour required. One tentative smile, one subtle nod, one more inch she took and with a juicy squelch, the head was in.

Erebus' explicit exploration continued, inch after irresistible girthy inch gently muscling aside her inner walls to make room. Had the young lady ever conceived something easily larger than her forearm working its way in there? Not even slightly. Had she considered the intruding appendage would be attached to her hung, handsome hunk of a brother? Not in a million years, yet that addictive sensation of fullness was the pinch which wouldn't wake her up from reality.

For every new part penetrating the pussy, fluids would ooze out to lubricate the next. Stiff resistance where the feline's hands clamped down tightly upon her lower butt suggested the endeavour was, for his sister, more an ordeal. Her bottom lip was taking so great a toothy assault it was a miracle she wasn't drooling blood like a vampire.

Within the girl, a dribble of precum laid the path for each new depth. Those huge, marked, saliva-soaked balls were proving to be key in maximising the mutual reward for their unlawful copulation. Every pulse travelling through the underside of his dick was like another object forcing its way in unannounced, for her nethers' sensitivity was already so strained, what with her being the sock around a fist.

"AAAaahhh!"

This moan's vibrato rippled through dense air, music to the cat's ears to know his gentle back-and-forth had stimulated his sister so. Having found equal pleasure in the action, the subsequent identical motion followed without delay. Three inches emerged a notch down on the greyscale spectrum having been coated in the siblings' combined love. Erebus closed in on her, rolling his hips forwards to fill the tight cavern with sparks of ecstasy.

This slow fucking continued, the two panting in unison while Kena's trembles downgraded from earthquake to aftershock. While there was still quite a length to go she relished the care with which the cat broke her in. His strong hands supporting her from beneath, his restrained grunting as her insides clamped down upon the mighty girth, his retracted foreskin snagging on one of the many walls he'd breached.

Why did I wait so long for this?

Her eyes trailed downwards. A white bridge embellished with wide veins snaking left, right and centre linked their bodies through acts of lust and passion. It made the gap between her spread legs appear infinitesimally small, as was the distance between its circumference and her similarly-pale folds on both sides. The developing teen brother to whom it was attached was satisfied - that much was obvious from two fangs glinting beneath his upturned lips - but... he ought to be groaning, drool trailing from a lolling tongue, racked in the bliss of delving within all the space she had to offer.

"Come on, big boy." Enticing the further encroaching of his pelvis towards hers would be a piece of cake with the reappearance of her sultry tones. "I know you've got more to give."

"You sure? I don't want to hurt you." Seventeen years of mateship meant she could see the raised eyebrows in his query.

"But you do want Mum and Dad to catch us?"

Spurred on by the mere inkling that their incestuous playtime would be rudely interrupted, such a discovery no doubt able to shatter the family's relationship but also, Erebus noted with greater concern, put a sharp and graceless end to a now-conceivable future of similar secretive sex, his hands shifted. The diamond blue stripes filed past his fingers as if they made a column of lights poking out from beneath the dropped blinds of office windows, giving way to the pale flesh on the underside of those juicy thighs.

More effort was required to halt his gentle thrusting than to hoist Kena's calves over his shoulders and lock in their position against the wall. The cat had before witnessed her luscious tits squeezed together (primarily during a peculiar stretch she'd do which involved puffing out the chest, craning the neck back and stretching her arms forward, though only when he was looking) but now took interest in the way those perky nipples reacted by turning ever so slightly outward. His hands resumed prime position in supporting her heavy buttocks from beneath.

The shark's inner walls absorbed the needy throbbing of his parked meat.

This is good. Their colliding gazes laid down unspoken consent. This is so very, very good.

Her cheeks lifted, lined with the red ribbon of a blush. She wanted him to experience every part of her, especially the plump pillows buffeting her posterior where his hands allowed themselves a playful squeeze. Hopefully the cat's evident return to foreplay wouldn't suffice so they could soon resume the real action, she hoped dearly.

"OOOHHHHHH!" Kena's moan carried a shrill warble of bliss throughout the house. Sparks of pleasure erupted where the phenomenal shaft explored virgin territory, paving the way with smears of his man liquid. There was certainly no cause for concern over him potentially stopping play: the butt squeeze had been a simple adjustment in order to lock their position so his hips driving forward weren't risking discomfort.

A quick withdrawal, another heavy thrust.

"Ohhhh my god, that is... that is a lot..." It was all too much for the inexperienced girl, blanketed in her brother's musculature, pinned down by his hulking arms and massive girth. Her brain's speech compartment had spilled its cells like a dropped deck of cards, frantically trying to pick them all up while under attack from the ecstasy coursing through her blood. "That is a lot of dick in me right now, ngah..."

Erebus chuckled, taking a moment to admire the indistinct stomach bulge where his tip plunged deepest. In exchange for the plentiful penetration his sister's insides massaged the intruding length as if she worked at the local massage parlour he'd checked out the other day. He could die for this addictive sensation, satisfied at what he was delivering as well as receiving, and instinct drove him forth to bury the hatchet even deeper.

Now the feisty feline was fucking her good and hard. She wanted all of him, every hot, pulsing inch he had on offer, and then once they reached that magic point together without a care in the world for the sounds and the sweat and the smell and the fear of getting caught, those titanic balls would clench up and unleash a mighty flood deep within her.

This is so wrong, but he's so big, and it feels so fucking right...

Not even the most resilient wedge of guilt, no matter how strong her conscience protested, stood any chance of a fair hearing amongst the mindnumbing wash of pleasure. All that could be conceived was what looked and felt like miles of slick, gleaming shaft emerging from her crotch before ramming back in, punishing her vaginal folds for a crime they so desperately needed to commit. Nobody was around to hear the pair's respective fluids sloshing together with each pussy punch, not that the squelches were audible over her ecstatic cries.

Both lacked the maturity for their taboo act (legally, at least) and their endurance consequently suffered. So greatly endowed was the male that his impressive build and equally captivating toolset would've granted any woman an easy ascension to fucked-silly status, but the tough pounding broke his likewise youthful sister through the highest plane within seconds.

"Y-yes... E-Erebus, ah..."

The stiff rod poking its head out from deep within her slim abdomen stretched her mercilessly. Despite the hung man being the first to properly break her in, she was taking his member like a champ. The moist cavern into which the lengthy shaft disappeared, however, was not limitless; Erebus soon found himself coming up against an impenetrable barrier. At deepest, several inches remained exposed to the dense summer air, but was their involvement worth the risk of his sister's cries switching from orgasmic to agonised?

"Erebus... yes... yessss!" Victim to the overwhelming girth of her new fuckbuddy's massive man meat, its surface stimulated every square inch within her nethers, racking the girl's conscious with a brutal whitewash of bliss. Kena's head flung back with enough force to dent the wall off which her back arched. Along with her voice reaching a pitch higher than either party knew her capable of and her nails uprooting tufts of fur across the cat's shoulders, the reaction painted a picture.

This picture was one of only the deepest, most taboo fantasy conceivable; one she'd never have imagined coming to fruition on such short notice. Fear of their unethical copulation being discovered was just icing on the cake, fueling both siblings with adrenaline to supplement their forbidden pleasure. Cocooned in her brother's musculature, pinned back by his almighty erection, the shark girl's orgasmic shriek rang true.

The ecstasy having overtaken her mind so, Erebus' submerged cock suddenly became a punching bag for her contracting muscles. A massage of unprecedented intensity barraged the sensitive flesh and, bathed in the afternoon sunlight with their exasperated breaths bouncing back and forth, Kena's body returned the favour by raising him up for a simultaneous peak.

"Holy- oh god, yes, uh... fuck, Kena!"

A far cry from the young gentleman's typical prose, but when the pressure reached breaking point, neither could care any less.

The biggest pulse yet stretched the girl's labia even further as the initial ejaculation travelled through to his tip where it spurted out with tremendous force. A second jet followed immediately after, laboriously coating her insides with his hot spunk; those hefty hangers she'd slobbered over earlier certainly took their duty seriously. Erebus bellowed a deep groan, plugging her insides as best he could as if they were a traditional mating pair.

While the summer climate captured their exuded energy to heat the duo externally, his semen was like a wholesome meal they'd cook and consume together on a chilly evening, warming every interior cranny it infiltrated. The creamy torrent painted her insides in great detail, each throb from the head nudging her cervix dumping what felt like another litre deep within.

Fuuuuck yes- wait, what the... is his dick growing inside me? What's that- whoa...

It had occurred to Kena, even amidst the sensation tsunami sending her into euphoric shakes, that visual recollection of this very moment would be a memory to cherish through to the end of her days. Her downturned gaze subsequently bore witness to her belly bloating incrementally as the flood exceeded her capacity with ease.

The cat's tremendous girth meant not a single drop could escape, the full load instead stretching her abdomen to new extremes as another powerful shot erupted, followed by another. Such great pressure within the girl's nethers induced a second coming of the blissful waves of orgasm, involuntarily clenching down on her brother's shaft again as if she hadn't already milked him dry. Her hands adopted a bony appearance from the intensity with which her fingers clutched his shoulder muscles.

As it was, Erebus' lipstick-marked balls had performed valiantly in the time of need, this time gifting their goods to an ecstatic recipient rather than the shower drain or his own mouth. As his orgasm began to wane, the stream of baby batter at last petering out, he suddenly lacked the strength to maintain their position. This onset fatigue became obvious with the drop of his head, still panting as one last dribble of jizz worked its way into her flooded cavern.

We just did that. I just cumflated my sister. It's so wrong, but...

"So good..." the boy murmured.

"I'll say," Kena giggled, catching his eye.

The otherworldly peaks melting away exposed an undercoat of guilt. When riddled with his sibling's infectious lust it seemed only right in the moment to oblige the needy girl, but the elation hadn't delayed in dissipating as if it was exited his mind on the back of sweatdrops. Regardless, her contagious smile assuaged the various consequent concerns and they fell silent, content to bask in the afterglow of their taboo indulgence.

They had crossed the threshold together. Neither had cause for complaint. While the preceding minutes would no doubt alter their future companionship to the greatest possible extent, no regrets lingered in the air, only a pure satisfaction for the direction in which their relationship had evolved. Future home-alone incidences would see the girl making her way to his room for playtime of the forbidden kind. No console, no controller; his joystick would be plenty.

"Oh shit, look!"

"What? What is it?" Erebus' head whipped around, following Kena's outstretched arm pointing to a saloon pulling up in the driveway. A chill travelled down his spine as he turned back to assess the worry in her widened eyes. Thank goodness for those patio doors.

The ensuing scene of wild panic could've passed as a comedy channel skit. Kena hauled herself up off the wall, attempting a graceless dismount by unhooking from his shoulders and coming to stand on her own two feet again. Erebus' hold vanished, distancing himself in a hurry. This of course resulted in his softening dick exiting her comfy cavern with the same ferocity their father used pulling a chain to get the lawnmower started.

The moment his tip emerged from her folds, only distinguishable under the copious cum coating by the veins peaking over its ridge, a tidal wave followed in its wake. Warm semen evacuated the shark girl's gaping pussy as quickly as her inner muscles would allow, though there was no hope that every last drop would escape naturally. Kena's first step was a wild slide through the pale puddle forming on the carpet beneath them.

"Go, quickly! I've got the towel here, I can clean up, just close the door behind you!"

Suddenly troubled by the effects of her liquid ballast, one dainty hand took place under her bloated belly. The sloshing sensation was comparable to having drunk too much water in too short a time except her brother was to blame for the liquid intoxication. Dribbles of said fluid left a most peculiar trail in the wake of Kena's waddle across the room, but she couldn't afford to worry about that now. The scraping of a door key searching for its hole powered her awkward stumble around the corner and towards the bathroom.

Still sporting a half-mast pole, Erebus looked down at himself in disbelief. Leaked cum had splattered his lower half like an abstract greyscale artwork. Patches of fur clumped together, matted by the preceding events' various emissions. By far, the most difficult to explain would be the sloppy kiss marks decorating his drained scrotum, but they were an invigorating reminder of the level to which their relationship had just progressed.

It would be a game of subtle glances, secretive rendezvous, maintaining nonchalant expressions while trading teasing gropes beneath the dinner table. He couldn't wait.

"We're home!"