A friend of mine was caught allegedly having an affair by his wife, and the wife is threatening to sue him for adultery and abandonment because she said she has proof of his alleged adultery; when the only thing that she has in her hands is a pair of panties and a credit card statement of the girl's trip to the place where the guy was which was paid for by the guy. She has told the pair that she also has witnesses among the hotel staff where the guy has stayed. Does she have a case or not? Can they sue the hotel for confidentiality/privacy issues?