First, let me give you guys a little bit of a background. I am a 19 year old (f), and my sister is 15. This whole scenario has been going on for about 4 or 5 years now and its become simply unbearable. It started out with small fits that were seemingly normal for your average teenage girl. But then something snapped. A couple months ago, my sister was admitted to a mental facility for trying to jump out of a moving car because my mom wouldn't let her go to her friend's house. She was there for about a week and when she came home all hell broke loose. Since being home, she has been in trouble with the cops for breaking and entering into 40+ cars in one evening stealing random shit. They have been to my house at least 4 times in the last month, but only because she went absolutely psycho. Since being home, she has broken 4 windows, the windshield on my mothers new car, a laptop, alongside various other things. She has been caught selling drugs, smoking pot, smoking cigarettes, and sneaking out. Each time she is caught now, she tries to frame me. At first I started off as a mediator. I didn't want to see my parents, or my sister get hurt, so i would try to help them compromise. Then she started to physically attack my mother. I became upset and told her that if she wanted to hit someone in the house, she couldn't do it in front of me. Then she attacked me and I got in my first fist fight outside of taekwondo... with my little sister. I don't think I've ever felt worse in my life. But now the story has changed. She has tried to plot my parents against me 5+ times and tried to get me kicked out of my house. Its the worst feeling in the world when someone you care so deeply about literally does not give fuck about you... especially family. She's tried to fight me again on two separate occasions, she has backed down each time. It has gotten to the point where if I did actually fight her again... Sadly I have no doubt in my mind it would take several people to pull me off of her. I don't think I could stop hitting her if the situation arose again. I don't want to hurt her. Im so scared.