My Sister's 'Fever'

Story by Thatninetailedfox on SoFurry

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#2 of One-shot stories

Vincent is assigned to care for his sister Vicky, instructed to care for any ailments and symptoms of her sickness. Taking advantage of the situation, Vicky persuades her brother to care for an itch that's been bothering her for the past few seasons.

Images are an edit of artwork I commissioned from Aogami https://inkbunny.net/Aogami


Lazing back on the couch, Vince, a young teenage ninetailed fox watched tv, the male in only a set of long, fuzzy, loose pajama bottoms, too lazy to get dressed as he was instructed to care for his younger sister while his parents were at work. Vicky, only a few months younger than Vince, had caught some sort of flu, and although her doctor said she was no longer contagious, and getting better by the day, it was still the job of her big brother to care for whatever ailments and symptoms she had plaguing her.

Just as the commercials ended, an army of eighteen year old, bikini wielding vixens, canines, and felines flooded the screen, Vince heard his name called from down the hall, his sister once again, distracting him from his favorite movie scene, right before all the girls got naked! It was a movie though, of course the girls fur and clever editing hid any nipples or slits from the cable audience, but still, the sight of bare fur was more than enough to catch the boy's attention... that is of course until he was summoned.

Vince grumbled, walking into Vicky's room, the scent of menthol and cleaners burning his nose as he approached his sister. He had always been called the older brother, though their ages were only a few months apart, Vince had always had to share everything with Vicky up until only a year ago where he was given his own room. With the vixen's cold Vince was strictly told to do whatever she asked, and to make her feel comfortable, though only the past few days she began using it to embarrass him, making the older boy snuggle and rub vapo-rub on her chest several times a day.

"I'm hot" Vicky whimpered, the young, nine-tailed vixen wearing a long pink cotton tee, her feet covered up by a sheet, the rest of her body open to the air. "I need you to help, come sit with me" She demanded, a deep feverish blush across her cheeks as her tails slowly wagged, a strange, strong scent breezing in from the fluttering fur, making Vince feel a little uneasy, though luckily his sister's illness was past the point of being contagious. Sitting on the bed Vince looked over his sister, she seemed to be sweating a little, a dampness tracing from her fingers as if she had been wiping off her forehead. "Turn on the fan" She huffed, pointing up over her bed frame.

"You couldn't flick the switch yourself?" Vince Grumbled, crawling up over his sister to click on the fan, a cooling breeze blowing over them as he felt a hand slip into his pajamas, gently sliding down the fur of his sheath to cup his balls, a light squeeze making the teen boy jump back, plopping on the bed and blurting out "WHAT ARE YOU DOING?!" before he spotted his sister's feet, a set of damp panties dangling off her right foot.

"Mom said you need to do anything to make me feel better... I need a boy to make me feel better" She huffed lightly, slowly laying back and lifting the neck of her shirt, letting the breeze blow through her clothing, a flutter of fabric showing small flashes of bare cream-colored fur between his sister's thighs. "I tried my fingers, it doesn't work, please" She begged, a submissive, needy whimper escaping the vixen as she lifted her knees, tails sliding aside to reveal her tight tail hole, the fabric of her shirt laying over her slit, keeping it hidden from her brother. "I won't tell"

Vince was quiet, his eyes staring at his sister's thighs and tight tail hole, knowing from their exploratory years what exactly laid above her little star. Slowly, the scent of a fertile, virgin vixen began taking it's toll on the male, seconds ago the thought of Vicky touching his sheath seemed wrong, and now he was thinking about showing it off to her. "You sure you want me to... what?" He asked softly, nose scanning over her fluttering shirt, drifting straight over her crotch to take in the mind bending scent.

Vicky whined, knowing her brother was examining her crotch for mating, even if he didn't know what he was doing yet, one of her tails curling up to feel her brother's growing bulge. "I want you to get naked, first... Then put it inside, my fingers aren't big enough to make the itch go away anymore" She panted in a heavy, lustful tone, the young vixen no longer thinking of modesty or chastity, she only knew she needed this heat to go away, and she had her brother willing to help in any way. Slowly reaching for her belly Vicky pulled up her shirt, revealing her soft cream colored stomach and crotch, her golden thighs parting to completely reveal her dribbling, puffy loins.

Huffing, Vince perked up his ears, his mind unable to register the incestuous act she requested, only confirming Vicky was a heated vixen asking to be bred. Eyes going wide, the older boy scanned his sister's swollen flesh, her previously featureless slit now sporting a strange, swollen nub at the crown of her vulva, protruding from her slightly open, inviting mound, the shape of which seemed to change slightly, vaguely resembling the shape of a feral vixen.

With his sister on full display, there was no other choice for the teenage boy, on his knees he started to slip off his pajama pants, pulling them off to join his sister in full disclosure, the sight of a plump, swollen male only making the needy heat-stricken vixen lift up her knees and pant softly, whimpering out a soft "hurry up~" as she watched her brother slip from his only clothing. Swallowing nervously Vince kicked off his pants and knelt before his sister's presented hind, his hands reaching for her hips and giving them a slight tug, shuddering as he felt the heat radiating from her loins even before they made contact with his sheath.

"O-ok, I'll put it in, for you, but tell me if it hurts" He whimpered out nervously, hips rolling instinctively as his peeking pink tip made contact with Vicky's slit, the young vixen letting out a loud moan as the inexperienced teens rubbed into each other, feeling his bony tip slide along her lips before catching on her fertile tunnel. Both siblings yelped as an instinctual buck insured the connection of their loins, Vince blushing as he looked down to see his sheath fur bunching up slightly against his sister's puffy lips, feeling the first inch of his rod sliding inside her tight, virgin walls. The older boy stayed in place till he felt Vicky's legs wrap around his waist, squeezing as she moaned out "More!~"

Content with the fact that he hadn't hurt his sister Vince leaned in over her chest and bucked again, this time pressing forward firmly, holding still as he felt his sister's walls slowly stretch around his shaft, the pair letting out pleasured moans as their bodies slowly adapted to one another. Vicky whimpered as she felt her tunnel open up for her first male, her body designed to stretch and fit a lifetime mate, the fact that she gave her first time to her brother meant that her body would shape itself around Vince, and no other male could ever breed her like he could.

Clutching Vince Vicky jerked her hips, pushing her swollen lips back into her brother's crotch, a small squirt of feminine juices covering the teen males heavy orbs, marking them with her scent. "P-please" She whined her hips jerking against his crotch, unable to resist her instinctual urges as she waited for her male to claim her.

Panting, Vince slowly slid his hands up his sister's sides, dragging the thin fabric covering her torso up past her breasts, revealing the firm young mounds to the open air. Blushing lightly he tugged off Vicky's shirt, leaving her gold and cream colored fur exposed in a way he hasn't seen since they were kits. With his sister jerking his hips, Vince slowly lowered his chest onto hers, pressing their bodies together as he bucked into her eager tunnel, forcing the last inch of flesh past her lips and pressing his heavy, fertile balls against her puffy, sensitive mound.

Grasping tightly onto her brother Vicky buried her nose into his neck, the young vixen overwhelmed by her senses, seeing her older brother nude, the contents of his thick, swollen pouch now buried deep inside her burning loins. Taking a deep whiff she breathed in Vince's scent, the strong masculine presence sending a shiver through her body, unable to comprehend the intense desires she felt for her brother at this point, her few thoughts washed away by the waves of intense pleasure brought on by the sibling's new union.

With a soft grunt, Vince opened his muzzle and gently locked down on his sister's neck, giving her soft scruff a firm tug as his grip tightened around Vicky's hips, his body sliding back slowly, pulling half his twitching flesh from her quivering lips before ramming back in hard, a loud, lewd slap echoing in her room as Vince's hefty balls made contact with his sister's tight lips. Growling through her fur the competitive sibling felt a strange desire to pin and overwhelm his sister, each thrust into her slippery, tight depths nudging the back of her young tunnel, his tapered, twitching flesh kissing the girl's cervix.

Vicky closed her eyes and moaned out helplessly, her body completely submitting to the male pinning her to her bed, the bites and growls unnecessary, but somehow increasing the pleasure erupting from their joined loins, the vision of her brother as a strong, willful male usually made the younger sibling fight and cheat her way on top, though at this point it was desirable to be overtaken by him. The feeling of bare flesh on flesh a dangerous, sinful pleasure neither sibling could deny, and as Vince rammed himself inside her tunnel, Vicky clenched around the base of his shaft, trying desperately to grab onto the slowly growing bulge on her brother's shaft, each tug from her depths adding a lewd, wet pop to the sounds of their lustful mating.

Once his knot began to swell, Vince pressed himself against his sister and rammed forward hard, his rapidly swelling bulge catching on her tight lips and slowly stretching them open, the male straining before a loud plop locked their hips together one last time. Vince and Vicky laid motionless for a few moments, each embracing each other as they felt the last chance they had to stop fading away as the young male's knot filled his sister's previously virgin mound, her puffy sex pressed into his sheath and balls, their scent rubbing onto one another, only one last act needed to seal the sibling together as lifelong mates.

Vicky dug her fingers into her brother's back, gasping out a long moan as her untouched walls finally stretch around and fit her brother's fully inflated shaft, feeling every inch of Vince's unprotected, fertile breeding spire. "Oh god, Vi-" Vicky moaned out before getting cut off by a sudden tug, Vince testing his sister's lips, checking the tightness of their tie before he rammed forward, the larger male starting to rock and rut, small, one-inch thrusts continually nudging and teasing Vicky's cervix as his sheath and balls rub into her crotch, teasing the sensitive exposed clit and swollen lips.

Without words, the siblings moan and pant, the short, rapid thrusts starting to shake Vicky's bed, a lewd, rhythmic squeaking of the bed frame echoing through their house, the young pair only lucky their parents were out, else the sounds of their mating would certainly cause an interruption of their fun. Gasping out a squeaky moan, Vicky's tight tunnel clamped down on her brother's rod, stopping his body in a deep thrust and holding his shaft up against the entrance to her womb. Once she started to cum, Vicky's body released a set of eggs into her womb, her body clutching and holding onto her male while they quivered and massaged his knotted shaft, milking Vince's sensitive rod in desperation, awaiting his fertile seed.

Gasping, Vince released his sister's scruff, panting and moaning as she started to clutch and milk his trapped flesh. After just a few moments, the older boy's heavy orbs tighten up against Vicky's mound, his shaft pulsing slightly in her tight grasp before heavy, thick ropes of fertile seed flood into the young vixen's ripe and ready womb, painting the innermost part of her body and marking the siblings as mates once and for all.

Slowly, the warm jets of seed fill up Vicky's fertile womb, a few thick, creamy globs oozing from her brother's tip as her body continues to tug and drain the hefty orbs up against her heated sex. "T-Thanks Vince" She panted out hotly, lowering her legs but keeping a firm grip around his back, the vixen's tails slowly curling up, each coiling around one of her brother's, forming black and gold spirals as the pair rest snug against one another, Vince's firm tie ensuring his seed had ample time to surround and fertilize each of his sister's eggs.

With their bodies locked together, the two young kitsunes had no choice but to lay pressed against one another, the fatigue of their rampant breeding taking it's toll on the teens. Blushing lightly, Vince caught his breath, giving his sister's scruff a gentle grooming, flattening out the ruffled fur from his love bite before he whispered out to his sister. "You feel better? The hotness gone?" He asked before realizing Vicky had fallen asleep, her ache finally dealt with, freeing the vixen's body and letting her relax enough to drift off peacefully.

Quietly, Vince lifted up his body, intending on leaving his sister to sleep in private, only to feel a tug on his knotted shaft. Looking down between their bodies Vince saw his flesh still fully inflated, Vicky's puffy, swollen lips stretched around his bulging base, as odd as her vulva seemed before, the nature of its shape became apparent, her lips fitting perfectly around his tender flesh, hugging and gripping it from every angle. That didn't seem the least bit odd at this point, after all, her body was designed to fit a male of their species, to warm and caress the male and keep him plugged in place till his seed could do it's job and sire a litter for the two mates. Lowering himself back onto his sister, the teenage boy nosed into her neck, closing his eyes to allow his body to rest, and hopefully after a brief nap their bodies will unlock and allow the teens to sneak off before their act is discovered.

When Vince began to stir from his sleep he gently slid his hands up Vicky's sides, a soft murr escaping his sister just before he found himself cupping a pair of bare breasts. Freezing in place he felt a soft lick over his muzzle, followed by the soft, lustful voice he had just discovered the previous night. "Good morning Vince." 'Wait, Morning?!' He thought to himself, lifting himself up only to shudder as he felt a slow, soft tug on his flesh, the softened rod slipping free from his sister's tight, hot depths, Vicky's hand jetting towards her lips, holding them closed in a desperate effort to keep all her brother's seed inside her body. "You stayed with me the whole night, in me too? That means you liked it?" She said with a rapid thumping of her tails, as she eyes Vince' dangling pink rod, her hand grasping the boy's sheath and gently pulling it up, covering up her brother's tender breeding tool to keep it safe.

"I-It's past noon? Did mom and dad see us together?" He asked in a frantic anxious jolt of energy, climbing up over Vicky to peer through the fan out her window, seeing no sign of their parents cars; they must have gotten home and left for work while they rested. Looking down at his sibling Vince blushed softly. "Huh? Yeah, well I was stuck, and tired; I-um liked it a lot." He muttered before climbing out of bed, the strong scent of their mating having subsided, the windowed fan most likely the cause, keeping a cool, fresh breeze running through Vicky's room.

Before he could make a move towards the door Vicky casually walked past her brother, bare and reeking of the scent of their love, her heat and his musk a telltale sign of the taboo they participated in the night before. "Wait, aren't you going to get dressed?" He barked, the young vixen swaying her tails to show off her curvy rear before turning to Vince, not the slightest bit of shame exposing herself so intimately to her only sibling. "Why? You're gonna knot me again after breakfast right? You said you liked it" She spoke in a lustful tone, the intensity of her heat driving the girl to do things she wouldn't normally think of, turning them into just another casual part of the day, breakfast and breeding.

The thought of another lustful, passionate session with the young vixen only stirred trouble in Vincent's loins, the teen following Vicky's swaying hips as if it were out of his control, the hypnotic movements only intensifying as she caught wind of his stare and rose her tails, the gesture confirming the notion that she intended on having a rough knotting to start off her day.

Once they made it to the kitchen Vince watched Vicky rummage through the cupboards, standing on one leg, her plump, fertile lips staring back at her brother as she tugged down a box of pancake mix, turning to find a familiar, bright pink bit of flesh greeting her from Vince's sheath. "so... no pancakes? Maybe, Pop tarts, they're faster" She giggled, putting the box down on the table and grabbing a bag of pop tarts as she motioned towards the table. "Sit"

Grumbling lightly at the command, Vince plopped his rear down on a dining room chair, only to yip slightly when Vicky straddled his waist, one hand on his shoulder grasping their breakfast packet as the other reached between their loins and gently grasped onto Vince's sheath, guiding it up into her soft passage before a moan escaped the girl's lips, lowering her weight into her brother's lap. Keeping still she wrapped both arms around Vince's neck and carefully fiddled with the pop tarts wrapper, removing one and bringing it up to his muzzle.

Gasping softly, Vince tried his best to remain still for his sister, feeling her tug at his flesh softly to pull it into position, a grunting, pleasured moan silent in comparison with his sister's as their bodies slid back into alignment, the boy happily accepting his breakfast with one hand as the other held his sister close. With his head on her shoulder, and her head on his, the two slowly took small bites on their pastry, heavy breaths between bites. With Vince's shaft slowly swelling, and Vicky's hips starting to roll on the tender rod, the pair had little interest on food, the sugary treat just a means of energy, necessary yet the only thing in the way of another blissful experience.

Choking down their breakfast, every moment grew hotter, their bodies warming up from the intimate contact, every roll of Vicky's hips pressing back her brother's fur, the older male's hands rubbing over her back, encouraging the vixen with soft gropes and squeezes to her rear, the sea of golden tails raised high to grant her new mate access to her hind, feeling every inch of his flesh once their crotches once again ground lewdly together, not the slightest bit of space between their young bodies.

Feeling her brother once again fully endowed, Vicky pressed her muzzle firmly against his, her tongue jetting into his muzzle, deeply kissing her sibling as she bounced on his throbbing shaft, moaning into his maw as a fleshy bulb began tugging and plopping into her tight lips, causing the young girl to thrust harder and harder into her brother's groin up until the pair fell backwards, the chair they had been sharing toppling to the ground, leaving the young couple on the floor, Vicky pinning her brother down as their tongues remained passionately intertwined, his knotted, throbbing shaft however, slipping out during their tumble, resting patiently against her tight rear.

After a few moments, Vicky broke the connection of their muzzles and slowly crawled over her brother, her puffy, tender lips dangling over his muzzle for a brief moment as she found her way to the center of the room; there she seemed to lose her strength as her upper half fell to the ground, tails slowly draping off to the side, leaving her dripping sex presented to her newfound male. Wriggling her hind She waited for her brother to make his move, the young vixen's walls gaping slightly, still holding the shape of Vince's knotted rod.

Rolling onto his knees Vince watched in silence as his sister stumbled to an open portion of the room, following in swiftly, her scent, as well as the sight of her swollen vulva teasing the primal regions of his brain. Wasting little time the older male jumped up and mounted his sibling, a happy sigh escaping the female as she braced her legs, feeling Vince's arms wrap around her hips and tug, the teenage boy sliding into position, sloping into the curves of her back and letting out a soft yip as he felt his drooling flesh glide gently against his sister's mound, their natural position making it almost too easy to line up for business.

With a slight shift and press of his hips, the siblings shuddered together in relief as the tapered rod slid back into place, filling the void left from their tumble. Grunting, Vince nipped and bit back down on Vicky's scruff, giving her fur a tug as he bucked and forced a half swollen bulge into his sister's tunnel, his heavy, fertile balls rubbing against her clit, making the young vixen squirm, feeling the growing knot within her walls accompanied by the gentle tickling of her sensitive little nub.

Soon Vince's hips began moving once more, tugging and testing their connection at first, once satisfied they rammed forward at a rapid speed, only to be repeated at an increasingly intense pace, the young male once again beginning to care for his sister's heat. Moaning softly, Vicky's walls began twitching and contracting, feeling her male's knot lock them in place her body sent out short pleasure filled bolts through her body, fingers digging into the ground as she felt those hefty, potent orbs pummel her tender, swollen vulva.

Sensing his sister's on-coming release, Vince sped up his ruts, pressing his chest down onto her back as his arms tugged and lifted her hind, steadying her quivering legs as he hammered at her tender folds, feeling them tighten more and more the harder he pressed. With the female beneath him whimpering out moans, her breasts flattened against the ground, tails curled over his hips and ears flattened, he could feel her limit break, the larger male ramming forward one last time, his heavy balls tightening up against her mound, their bodies working as one, the pair shuddering against one another.

Gasping out, Vicky's walls suddenly clamped around her brother's knot, pulling him in to halt his movements as she moaned out his name, her tight passage barely starting to milk his shaft when the first thick, fertile jet splattered the back of her tunnel, flooding the already occupied confines of her womb. With every pulse of life-giving seed Vicky's body loosened up, the stress of her heat subsiding, even with each of her eggs already claimed the feeling of her male releasing filled her body with a cooling, relaxing effect.

Resting together the two siblings felt a strange difference in their bodies in comparison with the previous night. Instead of a tight grip on Vince's shaft, Vicky's walls held snugly, though not uncomfortable for either teen, their bodies shaped to fit together like a puzzle. With their loins locked, things felt right, Vince gently guiding his sister's slightly shaky rump to the ground, snuggling his sister in close, the pair resting together, waiting till they had a chance to bathe and wash away the evidence of their incestous activity. each sibling smelling suspiciously like the other.

Day after day, Vince kept up his 'job' breeding his sister as often as she liked, multiple times a day up until her heat faded away, although even then the pair snuck together every night before bed. It was two months before they were caught; Vicky on all fours, the swelling belly she kept hidden under clothing on display as the naked vixen shook under her brother, the siblings ignorant of the audience during their orgasm, only after noticing the figures standing in the door frame.

With Vicky pregnant, her and Vincent having claimed each other as mates, there was only one thing to do. A few months later, Vicky and Vince had two new 'siblings', twin girls as far as anyone else was concerned. Vicky and Vince now shared a room, though their mother took Vicky twice a year with her to the doctor and ensured no other surprises came from a sudden heat.

Although not thrilled with their parents finding out, Vicky and Vince were happy to share a room together, Vince able to fall asleep snug against his sister instead of having to tug free and slink back to his room. Still, they looked forward to graduation, in just two years they could move out, get an apartment, and once again breed in the peak of the season.