The problem is, it sounds like the wife has been abused by this obeast all her life, and either doesn't realize it's abuse, or has come to see it as "acceptable." She probably feels some sort of duty or obligation to put up with it, even though the obeast treats her, her husband, and their child like shit. I'm on board with what you're saying, someone shouldn't have to put up with this kind of bullshit just because "they're family" but a lot of abuse victims are not at that point yet. Reddit OP's wife needs to come to the realization that her father isn't going to change, and shouldn't be a part of their lives. She especially shouldn't be subjecting their child to this sort of behaviour.