There is so much chaos and insanity around the active addict, it's enough to make any of us crazy. Does she have a key to your house, how is she getting back in? You're right to draw a line and set a boundary for your other children's sake. She will rant and rave and blame....they have to do that in order to not evaluate their own behavior. Are you in AlAnon? Are our other children old enough for AlaTeen? Think about finding a meeting, and keep the focus on what you can control.