Ty's nose picked up an intense, unfamiliar scent. Weirdly, even though it was clearly not female, it aroused him. A lot. He followed it eagerly, and before long he found its source- a handsome werewolf, his toned figure evident through his dark fur, his thick red erection protruding before Ty's eyes, and a teasing grin on his face, as if he knew he'd just lulled Ty in.
The werewolf kissed Ty, and its pheromones invaded him like a virus, starting to pervade his body- and reshape it. Ty felt a growing desire to have this wolf fuck him.
As if reading his mind, it said, "I'm not only going to fuck you. I'm going to breed you."
A shiver of both apprehension and anticipation went through Ty's body at those words, and he felt the wolf push him to the ground. He rubbed his shaft against Ty's, and Ty moaned in a surprisingly high-pitched voice as a paw pulled his chin upward.
"I got the scent of that catgirl you fucked. She is pregnant with your seed- now it's your turn."
Ty felt his body reshape itself in response to the wolf. His figure turned petite and curvy, his arms and legs now more small so he had even less possibility of fighting it off. He noticed his voice had only continued to heighten in pitch, and moaned in surprise as the wolf's paws brushed along his nipples- noticing when he looked down that they had swelled up and flesh was growing around them. Only one part of him had not been emasculated, and as the wolf's own rubbed along it Ty felt it too feminize. His cock shrank back into him until it formed the sensitive nub of a clitoris, and his balls moved into his body while his scrotum formed vaginal lips.
When the wolf kissed Ty again, its scent somehow seemed even more different. Ty realized that was because she was female now. She couldn't tell if it was because of the corruption or just because this had been a fetish of his and he'd just never known, but knowing this werewolf was about to fuck her and most likely get her pregnant was arousing as fuck to her.
It settled onto all fours and pushed home its large red shaft, making Ty yelp in surprise at the huge insertion inside her. Noticing her nipples felt hard and sensitive, and what used to be his penis before it shrank ached to be touched, she played with herself under the wolf, and cupping her breast and rubbing her clit managed to get her moist and loose enough for her to be comfortable.
As soon as the wolf could move, its hips eagerly pounded in and out of Ty, and she moaned uncontrollably at the pleasure, unused to how good her body felt. It amazed her what sex felt like as a girl- her body was way more sensitive, and she couldn't believe how into having a man mount her she was.
Eventually, as the wolf felt its peak near, it pushed further still into Ty, and she gasped as its knot pushed inside her. It felt so big, she felt it pulsate as his orgasm approached, and it reminded her how close she was to getting bred.
His snout moved beside her ear and he grunted with satisfaction as he came, and she felt him pulse and his warm, thick, animal seed paint her freshly formed passage. His lupine sperm soon found an egg her body had made for him, and it yielded to them, getting fertilized and making her pregnant.