Nikie

My stepdaughter is in a relationship that is very volatile.The father of her two sons drinks heavily and I believe smokes pot. She smokes also and takes paxil.They've been constantly fighting(physically)and just recently called me to take her boys for the night due to an altercation, police got involved.Her biological mother found out that the kids were with me and had a huge fit!I've raised my husbands eldest daughter (25) who ended up graduating from high school and having a great life. The kids who stayed with biological mother ended up with kids as teenagers and a whole lot of other problems. Their mother (hubby's ex)is an alcoholic and drug abuser.I've also taken in my stepsons kids for a year at a time when they were just born.So I'm wondering now that they are older, youngest stepdaughter is 21, and biological mother is going crazy should I just step out or help? My husband just doesnt want to fight with ex anymore so doesnt have too much to say in everything.