One night, Bella had a request for Orias. Vara was sleeping in her grandma’s room for the first time, her tiny snores coming through the door.
Orias was in his bedroom with Bella. She was flushed as she flipped through the sketches, searching for a monster or rather a specific feature she wanted to see him shift into.
His eyes were on her breasts, the way they bounced with each movement made his mouth water. Her nipples were hard and poking through her thin nightgown.
He didn’t know what she was planning but his dick was already half-hard in his pants. She was so cute.
Finally she found what she was looking for and turned the book towards him. It was a horse. Just a regular horse. With its long face, four legs and a tail. And a horse cock. His eyes widened before he looked at his sister who was biting her lip nervously.
Shapeshifting didn’t need to include everything of the animal, just the overall shape and form. But if she specifically drew the horse dick, then... He looked at the sketch again. Yep, she included it in great detail.
“Bella are you sure about this? The cock is...pretty big.” He warned her but the red on her cheeks showed she knew that already.
She nodded, her hands trembling a bit. Bella loved her brother, more than anyone else could ever understand and she loved every part of his body. But she also wanted to try new things and tonight was her night for experiments.
“Yes. I want you to try it on me. Just once.” Her voice was quiet but determined.
He smiled softly and kissed her lips, tasting the sweetness of her.
“Then lay down, love. Let me give you what you want.”
Her breath hitched and she obeyed, her legs dangling off the edge of the bed, her nightgown already discarded. The bed creaked as he knelt in front of her, his hand tracing her smooth thighs.
Candles on the sides of the room lit the sketch in his hands. The horse cock was long and thick with a flare at the base, perfect for tying a mare after ejaculation. The size was intimidating but it made him more excited than scared.
Looking back at his twin, he saw her blushing, her legs spread and her pussy glistening with anticipation. He swallowed hard.
Removing his pants, he shifted, his cock changing from its usual form to the one in the sketch—big, dark, and veiny. The flare at the base was throbbing, already leaking precum.
His sister gasped at the sight.
Her pussy lips fluttered open, inviting, begging him to enter and ruin her. He was going to do just that.
Moving closer, he rested his massive horse dick on her stomach, the heavy weight sinking into her skin. It reached her large breasts. Bella gulped. She didn’t think it would be this big, this heavy, or this arousing.
Her hands went to her legs and pulled them wider apart, her hole twitching, the clit swollen. The thick musk of his animalistic smell filled the air.
“Ready?” His voice was a low rumble, his hands gripping her thighs.
She nodded, her red eyes filled with pure, unadulterated lust.
Then he pushed in, slowly, carefully, the large head of his cock stretching her wide, pushing her past her natural limit.
“Aaaaah~ Ori it’s too big...it won’t fit,” she whimpered, her nails digging into the sheets.
He didn’t stop. His hands went to her hips and held her still, pushing more inside her. The tightness, the wetness, the heat—everything felt too good.
His alien girth ruthlessly molded her canal into the shape of his monstrous shaft, visibly stretching her lower abdomen into a taut, rounded dome as inch after heavy inch forced its way inside. She shrieked, her eyes rolling back into her head from the intoxicating pleasure-pain of a body stretched far beyond its natural capacity.
The feeling of being so full, of being owned by her brother in such an obscene way was too much and she came before he even bottomed out, her juices gushing around his cock and making a wet mess on the bed.
But he didn’t stop, the flare not yet inserted at the entrance of her womb.
With a deep, guttural groan, he drove the final, monstrous inch home.
The massive flared crown wedged itself deeply against her dilated cervix, plugging the entrance to her womb with a tight, seamless seal that blocked any escape. Buried to the absolute root, the heavy, monstrous contour of his shaft visibly distorted the soft flesh of her lower belly, creating a terrifyingly hot silhouette beneath her skin.
“Ori~~~ Ori~~~” She repeated like a broken clock. Her hands clutching her belly, rubbing his massive bulge through her skin.
A deep, animalistic growl escaped him as he began to thrust, pulling out a few inches before pushing back in, each time making her whole body shake and the bed creak.
Her pussy was a sloppy, tight mess. She was so sensitive now, each thrust sending her into another mindless screaming orgasm. The room was drenched in her scent, his scent, their combined musk of lust.
He grabbed her legs and put them on his shoulders, changing the angle so he could go even deeper. His heavy, full balls slapped her ass, making loud slapping sounds that matched her desperate cries.
“Bella...I feel every twitch of your walls, every flutter. Fuck...you are amazing,” he praised, his voice deep and husky.
Her toes curled, the only sanity she had left was her brother’s name on her lips.
His pace increased, the need to breed her, to pump his horse cum deep inside her womb was overwhelming. His thrusts became erratic, harder.
“I’m gonna cum, sis...take it all...all of my cum~” he grunted.
She wrapped her arms around her belly again, feeling his dick move beneath her fingers, his thrusts pushing his bulge deeper into her stomach. The visual alone was enough to send her over the edge.
“YES! Fill me! Give me your seed, Ori!” She screamed, her back arching off the bed, her legs trembling.
With a loud roar, he came, his cock throbbing, pumping jet after jet of thick, hot, smelly cum directly into her womb, expanding her even bigger, making her belly round and distended. The flare kept it all inside, plugging her up good.
He watched in fascination how her belly swelled with his release, the sight erotic and primal.
Rubbing her bloated stomach, she panted, her body spent and her mind blank.
“My belly is so full of your cum, Ori...I can feel it sloshing around inside.” She mumbled, her hand pressing down on her belly.
He grinned, slowly pulling his softening cock out of her, the deflating flare slipped past her abused cervix with a wet, heavy pop. An immediate torrent of thick, frothy seed followed, cascading out of her overstretched vulva like a broken dam.
With each squelching pullback, more and more of his load spilled from her, until her belly was finally deflated and his cock was free, slick with both their juices.
As his shaft slid free, a wet, heavy suction followed it. He stared down in absolute fascination at the beautiful, completely obscene sight before him: her over-stretched cervix and the soft, deep rose walls of her womb had been turned inside out, pushing past her vulva. Swollen, puffy, and weeping thick trails of his frothy seed, the prolapsed organ hung from her ruined canal like an exposed, hyper-sensitive second pussy.
Orias had never been more intensely aroused in his life.
Leaning down, he licked her prolapsed womb, tasting his own cum mixed with hers. It was dirty, it was wrong, and it was perfect. His tongue lapped at the soft flesh, making her moan weakly, her body too exhausted to protest.
The opening of her womb clenched around his tongue as if trying to milk it, the memory of his cock still fresh.
He shifted back to his normal cock, already hard again from the taste and sight of her. Lining up his dick with her prolapsed flesh, he pushed inside the small hole, the sensation strange but so fucking tight.
“Waa Orias! What...are you doing~?” Bella gasped, her eyes wide as she felt him fucking her womb from the outside.
His hands went to her hips, holding her in place as he thrust deep into the bulging, protruding organ. The sight of his cock sinking into her womb was obscene and hot as hell.
Her screams turned into incoherent babbles as he fucked her womb, the squelching sound loud and wet. Gripping the sheets, she felt every inch of him inside her most sacred place.
She couldn’t even think straight anymore, her brain was mush.
Orias kept pounding without mercy, his fingers wrapping around the hot, exposed mass of her womb, anchoring the hot mass steady like a living fleshlight, using the hyper-sensitive, exposed tissue to drive himself to a frantic pace. When his climax finally tore through him, he buried his human length into the center of the protruding organ, his seed spurting violently into the exposed chamber until the external tissue bloated and swelled once more under the pressure, dripping thick white ropes onto the stained sheets.
He pulled out and watched the cum dribble from the tip of her womb, down to the bed. His sister was unconscious, passed out from pleasure overload.
With a satisfied smirk, he cleaned her up and pushed the womb back inside with his fingers, feeling her inner walls contract around his digits.
She would be sore tomorrow and unable to walk but it was worth it.
Kissing her forehead, he whispered.
“I love you Bella. Always will.” Then he laid next to her and fell asleep, holding her close to his chest.
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Nice horse sex.