Rebecca took in a deep, sharp gasp; she paused for a moment, and looked down to see what sort of creature Claire had become.
Claire, it seems, was stuck in the middle of a transformation from human female, to male donkey. At least, it looked like that. She was equipped with a pair of black, solid hooves, a long, ropey tail with a tuft at the end, and even a pair of broad, droopy donkey ears.
And a cock. A big, black cock; totally equine in appearance, and with a set of hairless balls to match, too.
The half-donkey girl pressed Rebecca up against a wall, arms on either side of her head. With a huff, and a bray, Claire began to give into her bestial instincts, and she reached down to cup her thick, black member in her hands. She received no reaction from Rebecca, who seemed to be in some sort of daze, and thus she guided that equine cock right to poor Rebecca's slit. And then, she began to thrust, arching her hips upwards, bottoming out in the pussy before her...