Presure built in Dean's crotch and he arched back as the twins licked and sucked at his sexual organs. It felt so strange with the sheath, the pleasures slowly moving up a little, high on his belly. He felt his insides shifting, moving, changing as the donkey fever continued to work on him, but he was focused on the intense sensations of his brothers' attentions.
Sam and Max were also changing more. Dean could see thier ears strecthing up, and the spread of soft fur across thier skin. But something else was happeninga s well. They seemed to be getting younger. He'd swear that they were now less than 12 years old. Why would they get younger? He'd matured, and so had most fo the other boys.
Pressure built even stronger in his belly, and he ached for release. The twins were sucking and licking him constantly, though the sexual pleasure didn;t seem quite the same. Funny, the twin sucking his cock felt the same as the one sucking his balls. It didn't seem very sexual at all now, yet there was a different kind of pleasure in his mind. Satisfaction, contentment. What was going on?
FInally, he felt the pressure release, but it wasn't the powerful orgasm he'd expected. Instead, it came as a squirting sensation as the twins sucked. He blinked and looked down, eyes widening. Sam and Max looke dlike colts now, hardly any human left. And they were busy nusrsing from a donkey Jenny's teats. Dean's teats!
He gasped, but could not pull away. Looking at the twin foals, he felt even closer to them than he ahd when they were his brothers. A moist, slick feeling in his butt prompted a careful exploration with his fingers. Yep - he had a donkey cunt. ANd his balls and sheathed dick were history. His brother's had turned sucking into nursing, and him into thier mother!