A bit of background, my FiL is in his 70s and has been married twice, divorced his first wife (MiL1), after having numerous affairs and leaving her just after she had DH, then remarried and also had affairs, even whilst MiL2 (a lovely lady) was in hospital/hospice dying of asbestosis. My DH tolerates his father, only letting him back in his life reluctantly, because we had liked MiL2, and, despite everything, he loves his grandchildren. Today he bought his new "beau" to our house to introduce her to us. She is a single lady in her late 60s, never been married, and seems to adore FiL. She seems really nice. While she was out of the room he made a comment that she "wasn't much of a looker, but she cooked and cleaned well!". DH is insensed and wants to tell this poor lady what a shit nasty person FiL really is. This lady seems to be quite intelligent, but FiL can be a real ladies man, very flattering to her face, and a real male chauvenist pig behind her back. I don't know whether we should warn her, or just leave her to find out for herself. By the way, DH 2 brothers also have a simular attitude to their dad, and he is taking her round theirs tonight and tomorrow.