Should i move in with my dad? PLEASE HELP. PLEASE. (sorry this is so long)?

I think you should move in with your dad and your mom could pay child support so your dad doesn't have to worry about money issues. On the other hand you can talk to your mom on the phone once you live with your dad and tell her the reason you made you decision and that you need a safe environment to live in. She doesn't sound stable to take care of you and your sister since this new man came into her life. It will be hard leaving her because she could get hurt from this guy but you need to be safe and it seems like if she didn't want this she could leave when he is drunk. And having sex on your birthday sounds like your going to be in this for a long time