I hate my sister in law.? -

The first time I met her she tried to kick my boyfriend in the face, I have never once heard her speak in a normal tone, all she understands is yelling. She is completely 100% nuts, she had problems with the police and drugs as young as 13. The first time we spoke it was a year into my relationship with her brother, which she yelled at me about something he did. BTW - The house I rent her and my bf own together through inheritance, which they cannot sell until they are 25. Anyways my question/problem is that she lives above us. She is unemployed and leaves the house only to get cigarettes. She is always home, she scrutinizes everything I do, if I leave a light on, or use the washer or dryer when she wants to, if I am to loud, leave the screen door open, park in front of the house, pretty much anything and everything I do she yells at me about, or leaves me stupid rude notes. The way I see it I work full time, am a full time student, have a life and friends, and pay good hard earned money to rent this space, and she has no right. My boyfriend (her brother) fights with her every other day about her rude behavior and actions. I am at my wits end, I want so very very very badly to tell her off, and shave her head....... Other than that I don t know what to do. I have no family here, and this is all I can afford (renting from your significant other is dirt cheap). I m not moving. HELP ME!?!?!?!?!?!?????????|::::|girl you need to tell her straight up[ she aint your mom! Dont be afraid of her if your boyfriend loves ya all the way he would be on your side . everythig she does to you do it to her lol good luck|::::|You can t fix crazy baby..so use her as a source of amusement. Be so sickeningly sweet to her that it doesn t even make sense. No matter how much she yells and screams...no matter how insane she acts...behave as if she just gave you a cupcake with sprinkles and a hundred dollar bill. Smile and just not your head and say, quot;ok (insert name here.) I hear ya hon. I gotta ...take a shower...get runnin i m late for work...go water my plantsquot;....whatever. Then walk away with the biggest, dumbest, I must be on Xanex grin she s ever seen. Do it every damn time she flips out. It ll drive her crazy...it ll make her look even crazier than ever in front of anyone who happens to be watching her flip while you re sweet as pie...plus it will amuse you to no end...trust me. I live to do this to crazy people. It drives em even crazier than they are. Then you and your boyfriend can laugh yer azzez off later when you talk about how red her face was.