My sister has had her daughter for 7 years. She has her on primary custody where the father can get her for 20 days a season. He is in the military and recently got back from Iraq. Since getting back, he has gotten married and had another child with another woman and wants sole custody of my sister's child, with her only having visitation right. He also wants to move to another state. He's even going as far as to talk to my sisters ex lovers to say she is an unfit mother. My question is what can my sister do to stop him from moving away, he'll never let her if that happens and i'm afraid that if she loses custody she may hurt herself since my sister gave birth to twins which one had died in the father's care. How can I help stop this man from hurting my sister even worse..