He's a controlling and emotionally abusive twat, has been all his life. She may be starting to see it as it's impacting on his relationship with his daughter and she knows about it. She messaged me asking whether he's always been like this or is it recent. He obviously shows his best side whilst they don't live together but she is considering moving him into her house. I don't know the woman but I feel responsible for the mistake she's about to make. AIBU if I sit her down and tell her some home truths, or is it none of my business? My daughter only spends time with her dad at the moment because she likes the GF. She would be upset if they split.