My sister has been seeing a man for 6 months who she met online and has been asking my opinion on the situation. He spends every weekend with her then goes back home during the week. He claims to be "separated" but he lives in a 3 bedroom house with his wife and their two adult children. He says he's been separated for 6 years since both he and his wife had affairs. But he claims he doesn't want to leave the family home because he doesn't want to lose the house in a divorce. He doesn't earn a very high salary and his wife doesn't work at all.
AIBU to think this guy is not separated, he's basically just cheating on his wife with my sister, and if he hasn't left after 6 years he's never going to? What could he be telling his wife so that he can spend weekends, holidays, etc with my sister? If he wants to leave his wife shouldn't they sell the house, split the proceeds in half, and he can move into a flat?