With one sudden thrust, Dan pushed his minotaur cock into his sister. Kat screamed in agony; she'd never imagined something so big could enter her body. Somehow her vagina permitted her brother's enormous, misshapen bull cock to enter her, but the pain was immense.
For her.
Dan, the last vestiges of his human mind swallowed by his animal longing, held his sister down as he penetrated her. In the first initial shock of the rape, he simply put himself into her, then waited, not knowing what else to do. But then his monstrous lusts asserted themselves, and he began pumping in and out of Kat's body. Dan the minotaur, thick with muscles and driven by need, fucked his sister on her bedroom floor.
He started slow, with heavy breaths coming out his wide bull nostrils. Though he, a minotaur, was born to rape women, he had never yet done so, and he needed to work out his purpose. He stroked in and out of his sister's body, getting familiar with the feel of her under him. She was so soft and warm. So small. He could smell her fear.
But quickly, Dan gained the feel for his sister's body beneath him. He began to fuck her with increasing urgency. He had only one desire, to rape any woman he encountered, making monstrous babies inside their bodies. Dan fucked his sister faster, harder, deeper. He bit her nipple with his huge, flat bull teeth, and pushed himself ever deeper into her body, hungry, desperate, to spill his seed into her.
Kat lay in the tattered remains of her clothes, while the incestuous monster she'd created pounded her body. The minotaur's force scooted them across the floor, dragging her shoulders and ass across the carpet with each stroke. The rape hurt terribly, but the friction of her body on the carpet was almost as bad.
Dan fucked his sister with more force, desperate to release his seed into her body. Why wasn't he coming? He wanted to impregnate her, needed it, lived for nothing but to rape and impregnate. It was the nature of his power as a supernatural monster, too: when the rape was over, his sister would be pregnant. And in nine months—the pregnancy of both a human woman and of cattle—this woman, this thing, this meaningless cow underneath him, would give birth to his monstrous offspring.
With sudden heat, Dan burst within his sister's body, pouring quarts and quarts of cursed bull sperm into Kat's helpless womb. He threw his head back and lowed, the big bass roar of a triumphant bull, while Kat arched her back and screamed in agony. Her brother's seed was like fire in her body.
Then, his passion spent, Dan collapsed atop his naked sister. He weighed nearly a thousand pounds, and Kat was helpless to move beneath his weight. She couldn't reach her wand from where she lay, beneath her monstrous rapist brother. She could barely breathe, much less form any magic words.
As Dan drifted off to sleep, his massive bull cock still stuck deep in his sister's doomed cunt, Kat wept silently. She'd cast the spell on her brother, but the curse was on her.