A Mother that is an addict. Any advice?

I am dealing with this with my mother. Was addicted to fiornal for many many years with headaches. Then when my grandma passed she moved close to me and we finally got her into rehab for it. She did great and said she had a whole new way to deal with pain and other outlets to help her. Fast forward months later and she has neck surgery, and got addicted to Diludad. Doctor wouldn’t prescribe anymore so she went to her regular doctor and now he gives her Oxy. She abuses it and runs out 2 weeks before (like right now) and then goes to urgent care for a new prescription till the doctor renews hers. I’ve gone to her Drs with her and therapist, and my husband has come (she is a Paramedic so sees his happen all the time). And the doctors basically say they won’t refill it early and if she is in pain she is in pain. She stated 1 doesn’t work for her anymore so she takes 2. Chances are she takes up to 6/day. We are building a new home and she will have a casita type area for us to be near her. But I’m so severely depressed having to deal with a mother like this. I am 38, she is 68. Please, Advice?