I haven't had this experience, but am now dealing with my stepmom, who has become an addict and I am living in the same household with her and my dad.
In the beginning, before I took my recovery seriously, she would "bribe" me with an occasional pain pill. They're not my DOC, but I have abused them in the past and wouldn't turn them down. Once I truly began recovery, I told her I didn't want them, and would take nothing I didn't have a prescription for. She kept trying, and I kept saying "no".
My XABF does use the same DOC I do (crack) and I could not continue to be around him. I am certain, that if anyone in my family, including a parent, were using crack, I would have to distance myself from them, too.
Once drugs are taken out of a relationship, I found there isn't much OF a relationship left. What we had most in common was using.
It's hard to step away from your family, but I know a lot of people here, who have done it. It's called self preservation.
Hugs and prayers!
Amy