My friend is having a really difficult time with the father of her child, as she has never moved on, while he has. They have never really been in a relationship, but he has been a good father, pays maintenance and regularly has her overnights every week, and happily would have her more, it's only her that makes it difficult and tries to prevent contact. I don't know, but I suspect she may have mental illness because her behaviour is so bizarre at times, and she has no inhibitions about swearing and shouting at handover, which is highly upsetting for her dtr. Whenever things don't go as she wants, again it's dtr that suffers, no facetime with dad, or contact is refused. Whilst I understand her frustration with dad at times, I do not agree with any of her actions which impact on dtr, even if that also 'benefits' dad, and think this amounts to emotional abuse by denying her her right to maintain contact with dad. How can I convince her to change her behaviour, or even seek help?