You're kidding, right? Teenage girl, whose getting given anything she wants just to keep her mouth shut? You ditch Mom and she'll just expect the dad to cover the cost of her $3000 MacBook, and acts incredibly spoiled when he won't. Teenagers don't have the kind of moral compass some adults (Obviously not the wife) have. Ditch em both; OP's got enough evidence to make a clean break of it.

I agree. I think it's ridiculous to expect a child to be responsible for breaking the news of a parental affair. ****** up, even. It's the sort of thing that should be kept between the parents and definitely not involve the child. If the kid found out and the mother lavished gifts on her to keep her quiet, then that's the mother setting yet another terrible example for her daughter. Children aren't responsible for the crap things their parents do. Also, it doesn't say how old the daughter is. People are assuming she's a teenager but maybe she's not, she could easily be younger. I don't think a 10 year old (for example) would have the mental reasoning to handle the situation of discovering her mother's affair and then trying to cope with the mother bribing her. Yet again, it doesn't say how the father found out about the affair. Maybe he found out because his daughter realised her mother was doing the wrong thing and told him the truth.