Well, thats technically a kind of parasomnia so its really out of her control. Obviously you can't really confirm such a thing without a sleep study but typically thats a sign of sexsomnia. As a sexsomniac myself I really resent when people imply I should be punished for whatever happens during...
I don't get into a lot of age-play but I have several close friends who are... Age play can manifest in many ways depending on the roles played by each person and whether or not the play is sexual.