Anonymous wrote:I know this is simple, but can you just ignore more? Or find her things to do? She sounds unbearable but at the same time, the more stressed you get, the more you are the one who looks bad. Assuming you have already tried to prevent it and you have no way of getting dh to be reasonable, i would be gone a lot, like long days, and plan weekends away. I am not saying it’s not awful but letting go of the emotional piece and how much she gets under your skin will help.
My MIL was really difficult so I am sympathetic. She will also grow weak and die someday, most likely long before you and dh, so this is a short term problem in some ways. I wish I had realized that more fully when I was younger.
OP here - I do my best to be gone a lot, but I have to be here most days to take care of the tween. I can't ignore her because she is in my face day and night, and the house offers little privacy. I have long since given up on trying to be a gracious host - I think if you invite yourself over and then stay for weeks and are a terrible guest, then you have forfeited the right to that. Sadly, she is fairly young and quite healthy, so there is a decent chance she will actually outlive me.