I am taking care of my friends 5 year old daughter for a while. Her and her ex husband are divorced and she recently discovered that anytime her daughter has been at his house the past two years and a half years, she's been sexually abused by him and his friends.It hit the mother very hard that this happened to the little girl and she is going to get help for depression, before living with her daughter again because she doesn't want the environment to be unstable. Originally she was supposed to be returned to her soon, but it does not look like that will be happening, I will be getting custody for about 2 years.

She will NOT sleep. She throws tantrums every night and doesn't go to sleep until 4 or 5am. I'm worried. What do I do?