This was because my sister told my friend something and this might be my brother treats my sister a little badly which I think is kinda true. So my sister's friend was being horrible to my brother. Then my mum gets involved and starts calling my sister's friend a ***** and fat... Just being horrible. Then I heard noises in my sister room and I could hear my mum wow she sounded like a maniac. I went into my sister's room and I could see my "mum" shouting and my sister's sitting on the floor crying. The computer screen was on the floor and my mum told my brother to remove it (he was in my sister's room too). I said I hope it's not broken. My mum removed basically everything technical out of my sister's room. Then second time, I see my sister on her bed and my mum shouting again. My sister told me my mum started to attack her and wacking her and it caused my sister to bleed on her elbow. I can't remember it all. My mum started saying my sister is a ***** and how she would love for my sis to move out. Saying she once loved my sister but now she doesn't. I tried to stand up for my sis by saying "you can't say that" and "you're a horrible mother and saying she's not a good mother and she started on me saying I'm not a good daughter and saying I don't show affection... ermmm maybe because what she has done to me. So anyway... My mum also said if she had the chance to strangle my sister she would. I was shocked. After there is my sister in tears and I try to comfort her. She said something about killing herself. But she didn't thank goodness. My sister went in my room and she had a talk with me and she was okay after.