My parents were married 26 years and it was very unhappy. They divorced and it was quite messy. Dad remarried a great lady and were together until she passed away 25 years later. Now my dad is in Assisted Living and talks constantly about how awful my mom was/is, personal information that no child should hear about their parents and how he was screwed out of money. I always let him know that he should be thinking about the good times he had with his 2nd wife and not dwell on bad times. I get upset with these stories and can't hold a conversation with him that doesn't involve this topic. He is also telling this to my step brothers & sisters and anyone else he finds. Some details are very embarrassing and inappropriate and it makes me uncomfortable. Should I just ignore everything? Cut him off everytime he brings it up? Other suggestions?