I think that even though this woman sounds like a piece of work, she’s more accommodating than many others. Prior to last three years her son lived with her and even took his visitation with his child in her house, that’s a lot.

Even when you did not live there but lived with your own parents, you went there every day as well as regularly stayed overnight. I’d say this is more than many other mothers will tolerate. She maybe reached her limit. She wants her space.

You said you are trying to build your own life with your partner and his daughter, it’s understandable, but you can’t do this in someone else’s house! You have to be in your own place for that.

You are saying you are sick and tired of her, but she didn’t move into your home. You moved into hers. So moving out, together or alone, is the only way.

I have a very difficult father. I never lived with my parents in adulthood for that reason. Yes it took longer to be able to afford things and buy a house, yes it’s difficult and I was single mom by myself. But my sanity meant more to me than buying a house fast. And this isn’t even your parent. Decide what’s more important for you.