Is OTHER wrong in the post ? POST :  

This is my first time posting to /r/AmItheAsshole so i am sorry if i break any of the rules of the subreddit, or have any weird formatting issues.

Me (17M) and my sister (19F) have come from a very abusive household. My mother has been disabled for as long as i can remember, and my father has always physically and verbally abused me and my sister (My parents have been divorced since we were kids). It stopped when we got into our freshman year of highschool when we both decided to stop talking to him and seeing him on the weekends. I am now in my senior year of high school and my sister is now out on her own. She started getting into cocaine very heavily and its part of the reason why we kicked her out of me and my mother's apartment. She had nowhere to go so she just stayed with her friends, months roll by and she STILL doesn't have a job and into drugs more than ever. Her “Friends” got tired of her shit too and decided to kick her out. At this point me and my disabled mother couldn't afford to pay for the apartment anymore, so we moved in with our grandparents.

My sister, still having nowhere to go, thought it was a good idea to move back in with out dad, and he forced her to get a actual job and hold it down. this was about 4 months ago. We got a call from her last night that my father was beating and threatening her again so we left and picked her up for the night. We told her that she could stay ONE night while she finds a new place to stay.

During the night we let her over, she brought over one of her guy friends and snuck him into the house, she completely trashed my bathroom, leaving her makeup and shit everywhere while still leaving piss in the toilet and not flushing, literally like a child. Her dog, that i let stay downstairs, Pissed all over my carpet and the living room carpet. (Keep in mind i am allergic to dogs, not to the point of dying, but i will make me break out in SEVERE hives)

I now want NOTHING to do with her, she has treated me and my mother like shit for the entire time she was with us, and now expects us to come running to her safety when she makes bad decisions. So, am I the asshole here?

(Also i have not just thrown her onto the streets with her own caution to the wind, I am giving her a ride to wherever she needs to go to get shelter, and currently am in the process of helping her find apartments that she can afford and live in)