You've never actually said anything to her about her drinking, and sounds like you're waiting for your husband to take a stand. He has set and broken boundaries, so she is learning he can be manipulated. She IS hurting you, you're hiding in your room stressed out!
You just recently gave her 30 days notice, but if things got worse she would be asked to leave immediately. So what's it going to take for YOU to hold her accountable and keep your boundary? You can't wait for others to do it for you. You have a right to peace and quiet in your home.