Is there any possibility you could move further away? This sounds like a dreadful situation and the only solution appears to me to put physical distance between you and this toxic relationship.
I lived at home until I was 22 (low income due to studying) and my mother used to nose through my wardrobe to see what Id bought (anythig new got a lecture). She even stole money out of my purse until I began taking it upstairs and hiding it under my pillow. Once £2 went missing from money in my bedroom which was for fares and lunches. She also opened my letters so I was forced to use a local accommadation address.
I moved to a flat only about 2 miles away but it was wonderful. My parents were not on the phone (1960s) and there were no mobiles then or any way of keeping tabs on someone other than going out to a phone box. My mother commented endlessly on my lifestyle as a single woman - it was the days of mini skirts and the later 1960s.
Every year she demanded I "come home" for a big christmas family gathering which she knew I hated. I took to spending the holidays with friends abroad. Later I just lied about going away as there was no way for her to check on me. I also played intellectual games with my family to "get back" and they never knew how much I earned as I was paid by bank transfer. I moved out as soon as i finished my professional exams and got promoted. My mother had a complete meltdown when she found out I was moving out in a weeks time.
Is it rude to not finish a book club choice that was selected by someone else?
Books we loved when we were young


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