Trying to help my older sister who is being abused.?

My older sister is 33 years old and has 4 kids ranging in 13-3 years old. Her two oldest are from a previous marriage and her other two are from her current boyfriend. They recently moved to another state and my sister just bought her first house.

5 ? years ago, her boyfriend was thrown in jail for beating her up (severely). It was considered a felony and he was on probation, took anger management classes, etc. I never had faith that he would become normal. He has a drinking problem and is pretty much a loser. He hasn’t bathed his two children in at least 2 years. He pays half my sisters mortgage and half the day care. She pays for everything else. Groceries, clothing, partys, EVERYTHING. And she’s still always broke. She works full time and picks the kids up after school, takes them to school – after school activities, you name it. He does nothing. He works, comes home and drinks.

My sister called me last night (Sunday – Super Bowl night). She was crying. She said that he ripped her a new one because the chicken wings she made him were horrible. He then continued to call her every name in the boo (in front of all the kids) and when they went to their rooms, he bit her. He broke her skin. She called me telling me she is crying out for help. She doesn’t know what to do but she needs him out of her life. I asked her if he’s touched her since they have lived in Colorado and she said yet. I asked her how many times, and she said.. a couple dozen.