She can enter your home at will? I wonder if you shouldn't change the locks. You wouldn't just walk into where she lives, so why should she be able to come and go in your home. Thoughts from others on this?
I changed the locks on "my" house back in March. My intent was not to lock the W out but (1) her entire extended family, everyone and their dog had a key, (2) I did it to take back control of my life. At the time my depression went from practically suicidal to a level that I was able to manage with a little PMA. W didn't respond to favorably to it. Did it have an impact on her position on the M, I doubt it.