I'll never understand why Beth didn't think to go to Quentin in Petofi's body. She may not have known where he was at the moment, but she could have gone to the rectory or wait around for him to return to the mill, since that is Petofi's hideout. She could have waited...her telling 'Quentin' the gypsies were coming sent him out of there in a hurry and ensured he wasn't likely to be returning anytime soon, or at least for the rest of the night.
Beth took it for granted that Tim would believe the mind-switching scenerio between Quentin and Petofi. Yes, Tim does know about Petofi's powers, but I am sure that he believed that switching bodies was not a possible feat, even for Petofi. Beth tells Tim that Petofi is afraid of the gypsies, and would do ANYTHING to get away from them, and while we know that's true, I can understand why Tim would have a hard time swallowing that, considering he knows what the power of the hand can do.
I loved the scream at the end when Petofi and Quentin switch back to their rightful bodies.
Poor Beth, now she is the victim of bad timing here. She now thinks Quentin is Petofi, just after Quentin has returned to his rightful body. It really wasn't her night.