Just that faint sound is enough to get under Jerry's skin, leave him wanting both to draw this out and to do far more than this. Much as he wants her, he's almost surprised that he's been able to hold out this long. Determined as he is to see her through to the end, though, to make it good for her, he isn't going to rush. He finds a middle ground instead, replacing his tongue with a finger, drawing back just enough to close his lips over her clit, sucking gently.