A frightened squeak sounded as Lisle felt the sensitive tissue of her clit getting mauled and heard the fury in the doctor's voice.  She lapped more quickly, more diligently, tear-bright eyes seeking any positive reaction to tell her she was doing what was asked.  A shove, and Lisle felt the pain of a stretch at the corners of her mouth  Another shove, and her mouth was stuffed full of unnatural flesh.  All she can do now is scrub her tongue along the underside of the shaft.  Gasps and whimpers of fear sounded harsh in her ears, possibly loud enough to be heard in the stone cell, definitely enough to be felt in the taut confines of her mouth.