So my sister for the longest time has been extremely petty and inconsiderate. We used to have an amazing relationship and used to be super close. Being the oldest sister I would always give her advice and would take her everywhere with me since she didn't have her own friends.
A few years ago she started to become extremely moody and just plain mean. No matter how much I have spoken to her about her behaviour she will continue with the same crap. E.g stealing a painting I bought off her to support her painting business. Purposely making a mess and expecting me to pick it up( throwing dirty tissues all over my bedroom- which we share). Cutting up my knickers. Throwing my bra in the bin. Misplacing my things. Slamming doors because she is annoyed I have to wake up early to go to work on her days off and by doing this waking up the whole house. This is just a few things.
I have no energy left to constantly tell her what she is doing is wrong. I have told her to communicate with me if she has an issue and she chooses not to. She says I shout. Yes I'm human and I get Extremely frustrated when she continues with this behaviour. I am tired of constantly looking over my shoulder and we all feel like we are walking on eggshells around her. I am thinking of getting a lock on my bedroom door, her things are in my room too( we had to move her bed downstairs because she would not let me sleep, bearing in mind I have an extremely stressful job- I am a nurse and the lack of sleep was really affecting my health). Her belongings are still in my room as we don't have any more space in the house.
Im thinking of getting a lock so that she won't be able to misplace my things when I'm not home. I do worry that I'll come home and my bedroom door will be hammered through but I am out of ideas and communicating doesn't seem to be working. Please someone give me ideas I am so tired of this 