Vera sighed in relief as the hot water from the shower rained down on her soft aubergine fur, washing away the sweat and the aches of the day. She ran her hands over her body, feeling the contours with the moisture. At 19, Vera was very attractive, with slightly nerdy, but pretty facial features and a strong, curvy figure. She felt her fingers glide across her breasts, bright and perky, and slowly drift down to her crotch, almost unconsciously. Vera could feel her cock thrumming with excitement underneath her sheath, and despite the torrent of water, felt a trickle of her juices running down her leg from the pussy beneath. She’d been blessed from birth with both sex organs, and she’d been putting them to good use for a while.

Vera’s mind flashed back to earlier, when she got in the shower; her little sister Anna had just been coming out as she entered the bathroom, and she’d still been in the nude. God, she was cute, thought Vera. 9 years old, and perfect in every way. White fur, with the sweetest splotches of chocolate brown on her tummy and ears, extending up from her navel to her muzzle. Vera began to circle her clit with one hand as she thought about it, clutching at her plump balls with the other. A shuddering gasp escaped her mouth.

She could see it in her mind’s eye even now; Anna’s puffy pink opening between her legs, almost furless, only the slightest sweet white peach fuzz playing around the top. Vera remembered it being a little more pink than she’d expected, and almost engorged; had she been playing with herself in here? The thought sent sparks of guilty pleasure through her mind as she began to furiously plunge her fingers in and out of her cunt, her cock swelling and popping free of her sheath, pointing straight out and dripping pre-cum. She gasped and moaned, steading herself against the cold tiles of the shower wall, building herself up to a ferocious climax.

Just as she was about to reach the summit, Vera heard a voice call up to her from downstairs. “Vera, dinner’s on the table, get down here!”

Damnit. The distraction was all it took; the mood shattered like sugar glass and Vera growled in frustration as she withdrew her fingers from her throbbing pussy, her cock already softening. “Coming!” she cried back, rolling her eyes. She washed away her juices and towelled herself off roughly, sighing with pent-up arousal and annoyance.

Vera got dressed and headed downstairs, where a hot bowl of stew was waiting. Her mother and sister were already eating happily, and she smiled as she joined them, savouring the delicious meal. Her mother had always been a good cook, and today was no exception as she gorged herself on the nourishing food, the tender meat serving to satisfy some small amount of the primal itch that had overtaken her in the shower. Vera’s mother turned to Anna, and asked apologetically, “Oh by the way dear, I baked a couple of extra loaves of bread when I was making this. Could you be an angel and take them over to your grandmother when we’re finished?”

Anna grinned and nodded. She always loved the chance to see her grandma; there was always a hug and some treats in it for her, after all. Vera eyed Anna during this exchange, and felt her heart melt a little at the young girl’s enthusiasm. She had always been so sweet, so innocent. Vera felt a tiny pang of guilt about her lustful feeling towards her sister. She’d always had them, ever since the little girl was old enough to be her friend as well as her sister. Ever since she’d seen that perfect, tight little cunny for the first time, Vera knew she wanted it. Vera loved Anna very much, but love could only take her so far, and she felt that base hunger tremble through her privates as her little sister smiled that sweet smile.

Once they were finished eating, their mother cleared the table and fetched a basket for the bread, which Anna took politely before going to get her shoes. “Thanks for dinner, mom,” said Vera appreciatively, giving her mother a peck on the cheek from behind. “I’m gonna go take a nap I think, let the meal settle.”

As Vera passed Anna in the hallway, she leaned down and gave her a kiss too, this one on the lips. Anna grinned her toothy grin and wrapped her arms around Vera, who almost recoiled before catching herself. She could smell her sister’s sweetness everywhere now, her face pressed in to the nape of Anna’s neck. Her brain felt fuzzy and she felt her crotch stir again, as the smell of home, and of family, the smell that she always associated with her sister, overtook her senses completely. Vera spaced out, just for a moment, before giving her sister a squeeze and heading upstairs shakily, her now erect cock pressing tight in her panties.

She almost ran for the last few steps, before crashing in to her bedroom and slamming the door shut, sliding the deadbolt in to place with a clunk. Vera was breathing heavily now, and could feel that something more had just awakened inside her. An inexorable, undeniable desire, a need that must be sated. She leaned back against the door, panting, mind racing with thoughts of Anna’s perfect body. She felt a ricochet of adrenaline whenever her mind wandered to her little sister’s cunny, and the thought of taking it and making it her own.

Vera closed her eyes and focused on her breathing. When she was calm, she opened them again. She could feel a wetness between her legs and realised that her precum and pussy juices had practically soaked her. “Fuck,” she muttered, patting the wet spot. She opened her closet and began to root around for a fresh pair; then she spotted it. The thick, heavy faux-fur werewolf costume she’d worn last Halloween when she took Anna trick-or-treating. Vera froze, staring at the costume. It almost felt poetic. She hesitated, for just a moment… then began to strip off and change in to the suit.

Once she’d zipped everything up, Vera checked herself out in the mirror. It was a good quality costume; she’d wanted to impress Anna, so she’d gone all out and spent some of her savings on this specialist costume from an Etsy craftman. She could see perfectly clearly through the flush-fitting eyeholes, and she almost jumped at the sight of her reflection. It was certainly convincing, and you wouldn’t know it was Vera in there. Perhaps more importantly… neither would Anna.

She stepped out of the closet, and went for the door, before thinking better of it; if her mother spotted her like this, it would raise questions. Instead, she opened her bedroom window and climbed out, landing with a predator’s grace in the back garden below. Vera could feel herself trembling with adrenaline now, as the full reality of what she was about to do settled deep inside her stomach. She almost felt nauseous, but she knew there was no going back now. She had to feed the beast.

Vera began to run.

…

Anna visited her grandmother enough to know the fastest path was through the forest near her house. She could take the main roads, but those circled around a lot of different streets; if she cut through the woods, the terrain was a little rougher but she could practically move as the crow flies and arrive in half the time. She’d been scared of the oppressive shade of the trees when she was younger, but now she was fearless, and plunged through the forest as if she lived there herself, humming a happy tune as she went.

Vera’s ears perked up in the distance; she was perched in the branches of tree about 30 meters ahead, and her little sister was making no such attempt to conceal her presence; to her older sister’s more experienced lupine ears, Anna may as well have had a marching band in tow. Beneath the mask, Vera licked her lips, her mouth dry and her heart pounding. It hadn’t taken her long to overtake her sister and find this spot, and the wait had been agonizing. She’d spent it agonizing over the choice she was going to make; in theory, she could always turn back, or just stay hidden and let Anna carry on her way. In practice… there was no stopping this now. The craving, the all-consuming desire, it had built up too much and for too long, and now it must be slaked.

Anna was approaching fast now, only 10 meters away. Vera closed her eyes and wrestled with her conscience. She could feel how wet she was already, and her cock pressed hard against the inside of the costume, almost painfully swollen and throbbing with lust.

5 meters now. Vera tensed, knowing that in a single swoop she could take everything she wanted; she could satisfy her soul’s desire.

2 meters. Vera leaned forward, balancing carefully to remain silent, preparing her dive.

1 meter. Vera flexed the muscles in her legs.

Zero. Now Anna was directly beneath Vera, who prepared to jump. For a moment she paused, wrestling with her desires. Anna began to pass her.

Vera froze, then glared down and roared, a roar of animal rage. Then… she took the plunge.

Anna spun around and began to scream as the dark shadow of the costumed Vera fell upon her, but Vera was ready, and quickly wrapped her arm around her little sister’s mouth as she restrained her struggling, panicked limbs, intertwining with her like a climbing vine. She had her prey. Now to claim her prize. Lowering her voice to a deep growl, she purred in Anna’s ear, “Hmmmm… what do we have here, then? A sweet little morsel like you all alone in the woods?”

Vera relaxed the arm that was smothering Anna’s mouth to let her talk. “I-I… I was taking this basket of bread to m-my grandma… p-please… please don’t eat me!” she cried out in fear, whimpering and trembling in the inescapable grasp of her captor. Vera grinned. “Eat you? Hmmm… what an excellent idea…” she chuckled darkly.

Careful to keep her sister pinned, Vera moved smoothly down, snuffling at Anna’s cute little body as she went, taking in that heavenly scent. With a grunt, she curled two fingers around the hem of Anna’s little pink skirt and panties, and ripped them away in one powerful clawing motion, causing Anna to cry out in surprise and fear. Now that perfect pink cunny was revealed, and this time Vera could enjoy it up close, for as long as she wanted. It was a pristine innie, with just the tiniest button of a clit peeking out at the top. The lips were still swollen and pink, just like they were earlier. The rest was practically hairless, save a tiny smattering of peach fuzz from her wolfishness.

To her surprise, Vera saw a trickle of wetness began to drip down from the child’s pussy. Then, a new scent wafted up. Something entirely different and unexpected, but unmistakeable to the big sister’s fully grown animal instincts; her little sister was in heat. That scent would get anyone of the species excited, but to Vera’s mind, already full of love and desire for Anna, it may as well have been a bolt of lightning, direct to the brain. Vera, still staring, eyes wide and transfixed, lowered a hand down to her crotch area and undid the hook-and-loop fasteners, releasing her twitching cock from the confines of the outfit. She could hear a steady dripping noise, and realised her precum was pattering gently against the leaves like gentle rain.

Before she knew what she was doing, she pushed her face hard against her sister’s cunny, pressing her lips and tongue deep inside. Anna squeaked with shock and pleasure, while Vera’s eyes rolled back in her head as she huffed that intoxicating, bewitching smell deep into her nostrils. She was already addicted, the pheromones wriggling and writhing inside her brain like a thousand shimmering glowbugs. Vera felt lightheaded, and began to squeeze her cock with her right hand, milking yet more pre from herself. Her shaft was wet with the juices that were trickling down from her own pussy.

Her whole body twitched and writhed with each breath, and Anna’s followed suit with each kiss, each lick, each desperate press against her cunny. She’d played with herself before, but this was unlike anything she’d ever felt, and she found herself moaning, even as she struggled against Vera’s restraining left hand.

The pheromones had done their natural job; Vera was more overcome with lust than ever before, and almost regretfully, she pulled her face away from her sister’s cunt, drawing an anguished, disappointed moan from the little girl. Vera could feel Anna’s juices smeared over her lips and cheeks, and stared down at the mess she’d made. Her sister was staring up at her, puffy pussy even redder than ever before, glistening with girl cum. Anna was clearly still terrified, but now there was desire in those eyes too, even if she didn’t know or want it. One of the disadvantages of being a heat animal; your body didn’t always align with your mind in that way.

“Hmmm…” purred Vera, once again affecting her rumbling disguise voice. “Someone’s in heat. Definitely ready for breeding, aren’t you?” she grinned. Anna’s eyes widened, and she began to shake her head in fear, struggling yet further.

Yet, it was no use. Vera was already shuffling forwards on her knees, still restraining her little sister with one hand. She slapped her thick, engorged cock down against Anna’s tiny pussy, eyeing the comparison. It was going to be a tight fit, but she didn’t care. She was taking what she wanted. Anna cried out in pleasure and fear. “P-please, no, mister werewolf! I-it won’t fit!”

“That’s where you’re wrong,” smiled Vera, an evil glimmer in her voice now. She knew this was dangerous; Anna was in heat, so she could easily get pregnant. That thought alone should have been enough to snap Vera to her senses, but in this primal moment, it only served to turn her on more. She could even feel her heartbeat pounding in her dick, which bobbed up and down with her pulse.

Vera reached down and pressed the tip of her cock against Anna’s entrance. She could feel the warmth searing the tip in waves, and she groaned with pleasure. Anna gasped in terror. “No, no, please, no!” she whimpered, struggling to get away, powerless against Vera’s strong grasp.

It was too late now. The heat, the moment, the hunger, all came together in one crashing moment of lust, and Vera pushed forward, steadily and without hesitation, slowly spearing her kid sister on her cock. Vera had to cover Anna’s mouth to suppress her scream of pain and pleasure. Vera sighed with satisfaction and relief, moaning as she felt Anna’s tight warmth trembling and hugging around her cock.

Anna was whimpering and crying against Vera’s paw now, but the scream had stopped. Once Vera was satisfied that her little sister was calm, she withdrew her hand and spoke softly, “Shhh… be quiet, little girl… wolfie wants to have his fun, now…”

With that, Vera retreated, then thrust back inside Anna’s sopping cunt forcefully, eliciting a gasping, crying moan this time. “Looks like she’s used to it enough to stop screaming, at least… Now let’s see how far we can go…” thought Vera with a grin. She began to fuck her little sister’s kid pussy, slowly at first, then faster and more aggressively, hunching down over her little form and dragging her tongue up from Anna’s belly button, across her flat little chest and nipples, then finally across her neck and face, absorbing the taste and smell, saving the moment in her memory.

With each pounding thrust, Anna’s crying whimpers gave way more and more to moans and tearful giggles of pleasure. The pain gave way, and soon Anna found her own heat hormones ramping up; she even found herself pushing back every now and then. She was so confused, but… so full… Vera was very well endowed. Her body began to react without her conscious consent, and Anna’s eyes began to roll back up in to her head with the intense, agonizing pleasure.

Vera was moaning now too. Anna was only 9, and so, so tight. More than that, despite the aggression needed to get here, Vera really did love her little sister, and now, she was finally taking her, joining with her, owning her. She’d masturbated a lot to fantasies of this moment, and here she was, slamming her little sister’s pussy.

She began to feel her climax creep up on her. Vera almost felt resentful; she wanted this moment to last forever, but in the same breath, she knew she wanted more than anything to fill this little girl, this beautiful angel that she loved with all her heart… she wanted to fill Anna with her cum. The pheromones buzzed in her brain like a drug. She knew she wanted to pump a baby in that young womb, right here, and right now.

She hunched over even further, wrapping her arms around her little sister, and kissing the nape of her neck passionately, growling and groaning as the sensations tingled and buzzed and shook within her. With a final agonized, desperate roar, Vera plunged deep inside Anna’s cunny, popping her knot forcefully past her tight virgin lips. Anna screamed once again, but to Vera’s surprise, she felt her little sister’s legs wrap around her waist, pulling her deeper inside as the pair came together.

Vera grunted and moaned as she unloaded shot after shot of cum deep inside her little sister’s tummy, shooting it right up against her cervix, practically injecting it in to her womb. Anna shivered and cried as if in the grasp of a terrible fever as her own, very first climax rocketed through her body, lighting up every neuron, paralyzing her with sensations she’d never felt before.

Anna began to groan as her soft little tummy began to bulge and swell, growing and straining under the building pressure of cum filling up her tiny womb. Vera thrust in and out, pushing, even forcing more and more cum deep inside her little sister, who moaned in arousal and discomfort as the weight of her bulge pressed on her from within. Vera came a lot, and before the pair knew it, Anna had a cute, rotund pot belly; she practically looked 9 months pregnant.

As their orgasms wound down, the pair collapsed together, breathing heavily, sweat and bodies pressed against one another as they both began to drift on the waves of their afterglow. By the time Vera’s cock softened and popped out of her sister’s ruined cunny, releasing a torrential river of jizz with a soft blorp sound, Anna had passed out into a deep sleep. Vera sighed, contentedly. She held on to her beloved sister for a few moments more, before gathering herself and standing up, staring down at the damage.

Cum dribbled slowly out of Anna’s no-doubt aching hole, and Vera soaked up the beautiful sight. Another one for the memory banks.

In the gloom and silence of the forest, Vera dressed Anna, bundled her up in her arms with the basket of bread, and began to carry her home.