Good for you! Stand strong and true to your convictions!
When my son moved in with his girl friend, before he left I had a talk with him about his having a plan in case it didn't work out between them. His response was "Gee, thanks Mom, for your faith in me. You're always so negative." I replied "I just want you to realize that our home is not Plan B should it not work out between you and your girl friend."
I haven't had to act on my comment--he hasn't asked to move back home--yet. Maybe he never will. He almost got kicked out of the girl friend's house right after he moved in, though. She told me she told him that she should ask him to leave immediately but she would give him another chance. So far so good. It's been five months now. I thought back to his comment about me being so negative. No, just a realist. I hope my husband and I will be strong like you demonstrated here should he decide to leave his girl friend or get kicked out from her house for using drugs or what ever reason.