boyfriends sister pregnant and still smoking and maybe doing drugs.

My boyfriends sister is 6 months pregnant. She is 24 years old and has never been on a pay roll in her life or had a rea job. An old friend of hers worked as a house maid and she would help her and get paid under th table. She no longer does that. She is also an ex (for all I know still is) meth addict. I don't know if she still does meth or heavy drugs but I do know for a fact that she still smokes cigarettes every hour at least 2 each hour and I belive she also still smokes weed. She takes off with her babies daddy who is 54, jobless but sells drugs. He also drives around illegally since he doesn't have a drivers license and no insurance and he lets her drive the car because she has a license but there is still no insurance on the car. They said because the baby is unborn there is nothing anyone can do about it. I don't know what to do..