It's probably better, she wouldn't even know how to reply to that. Being witty just isn't her game, and she probably would have just laughed some more and blushed a whole lot and been more awkward about it than she cares to admit. Instead she just gets to kiss him again.

His little tongue maneuver is received well; her lips part, inviting more. She wants so bad to return the gesture, but holds back. There have been issues in the past regarding her getting a little overzealous and her teeth making things less than pleasant, so she has to be content to let him take the lead on this one.