[ The cry and the fact that she isn't trying to get him to stop at all is all the proof he needs and so he pushes into it just a little, milking the pain before pulling back and letting the ridges and bumps melt back. He doesn't let the demon come out and play as much as some and perhaps he's just a touch self-conscious about it since coming to prison. Another thing he doesn't share with the rest of the vampires.
Of course, this doesn't mean he's done playing. He goes back to kissing and licking her skin, working his mouth over the sore spot to see if he can coax any more sounds out of her. ]