She wriggles around a bit before unleashing a jet of rich dark yellow pee straight into his open mouth, Jeff is unable to do any thing but watch as she fills his mouth with hot rich urine.
After a few moments he realizes he can taste it, the pee has a strong salty flavor with a hit of sweetness and slight spice to it, not something horrible like he expected, in fact he decides that he likes the taste and needs to take up drinking piss. He wonder if his girlfriend Jenny would pee into his mouth when he changes back they could make it a nice game.
After a minute or two his mouth is full to the rim with the girls pee. The girl gets up and Jeff watches her pulling her pants up through the rippling yellow pool she left as a present sitting in his mouth. By this point Jeff is no longer horrified, he actually quite enjoying the wonderful flavor of urine in his mouth.