Tyler knew that if he ever wanted to see himself human again, he'd have to let the Madame change his body as she wanted. But that didn't mean he'd like it.
His pecs became more defined, and his hands slowly grew a layer of hair over their backs. Tyler's palms remained furless, and overall his hands were still human, aside from the bay hair. His bovine nose caught a musty scent coming from somewhere below him. Tyler looked down and yelped (as much as a bull can yelp) when he saw his cock was growing. Slithering out of a thick black sheath to expose itself to the world. The head wasn't right though. It was far too stubby and was angled. The hole was bigger than Tyler remembered too.
The shaft thickened, and lengthened at the same time. Tyler wrapped his hands around as much of the dark pole as he could. It felt incredible, though deep down he knew it was wrong. But again, if he wanted to be human he'd have to let the change continue. Beneath his growing cock, his balls began to inflate. Little by little, his egg sized sack grew until it looked as though someone had shoved two grapefruits inside. His entire crotch was soon a dark brown color, and felt twice as heavy.
In addition, new hormones seeped from Tyler's horse balls to his body. Over whelming feelings and thoughts clawed at Tyler's mind. He needed something, anything, to fuck. His shaft was begging to be used. Madame Illusia looked on, aroused herself.
Magic spread from her fingertips, as she changed her own body. Tyler needed a release, and she was more than happy to give him one. Her pussy was already wet. But as the changes set in she grew wetter. Her pussy pulsed to the beat of her heart as it swelled. The skin surrounding her cunt was almost identical to the skin covering Tyler's scrotum. Thick and black, which wiry public hairs surrounding it.
Tyler's nostrils flared at the scent of a mare in heat, and snorted a command. Madame Illusia undressed as the rest of her body transformed.