Having witnessed countless divorce and custody cases, I recognize LMP's behaviour. She is a woman scorned so she acts like (and probably believes) there was nothing good about MJ or their relationship. I've heard people in divorce court who've been married for 20 years and have 4 kids together claim that the other party does not have ONE single good quality. When people get hurt, they aquire very, very selective memories. It's pathetic but also human.
The thing is that Michael hurt LMP by marrying Debbie and having a kid with her so soon after the separation. She even admitted this herself. I wish she were more mature and could really see her own part in the whole thing but meh.