I think she's becoming his good-luck charm. She stood between him and the servant girl, maybe that's why the effects were less severe at that time? And later, when they chased after the girl, there was no "barrier" between her and the prince.
Also, the prince has of course no common sense when it comes to women, considering his circumstances, but... I wonder if he is ever educated, then would he get less touchy with Lynette? And would Lynette suddenly miss his clumsy tries to touch her? Hm...