I am trying to help raise my fiance's 9 year old daughter, but I am going crazy! She acts more like a two year hold than nine. I have two boys of my own and don't have nearly as many problems. Her father does not like to discipline her and allows her to throw temper tantrums with no repercussions. I don't know how much more I can take. If I talk to him about it or try to discipline her, we fight or he tells me I'm making a big deal out of nothing. HELP!!!