Thread: this little girl is horrible

I know that title sounds horrible, but hear me out. My daughter is 2 years old,Brittney. She is picking up every little action or word. She has a cousin, who is 4,Johanna. She is my husbands sisters daughter. The day I brought Brittney home from the hospital, Johanna slapped her in the face. And its only gotten worse! Johanna has started to throw crazy fits where she will hit and scream things at you like "SHUT UP STUPID!" and "I ****ING HATE YOU!" She will grab everything in a room and through it. Pictures off the wall, bottles, the remote. Anything she can find. I know that this is a learned behavior and I have my problems with his sister as well. You can read my other post in the family section if you wanna know how I feel about her. But I am concerned with my 2 year old being around her. The other night we were having dinner at their house and Johanna sings while we are sitting at the dinner table "Brittneys gonna die". In this scary kinda pleasent voice. And her mother doesn't do anything. I wanted to slap her across the face. I couldn't believe she said that. I am worried that if I allow Brittney to be around her she will pick up this horrible behavior. But I don't know how I can stop it. My husband is very close to his family. We spend the whole weekend at their house and his sister lives very close. We have dinners together when we are there and we go to parks and stuff with them. How do I tell my husband and his parents that Brittney is not allowed to play with Johanna anymore. I don't want to come out looking like the in this situation. But it is looking like i may have no other choice. You really should read my other posts about this little girls mother. It is so obvious why she acts this way. But I don't want my little girl learning how to do and say these types of things. She already has in some ways. I wish that there was something I could do for Johanna because I am worried that she has some serious problems. And her mother thinks that its all normal phases. I have never heard of a phase we the kids sings someones gonna die! And it was the way she said it. Creepy, singing and she had this smile on her face that made me think that she wanted to kill brittney herself! This child gets no dicipline. There are never any consequences. She was in day care for a while but Laura had to take her out for the same kind of reasons. Now she stays with my husbands mom during the day, so laura blames everything on her! I am there when laura is not and I see the way she acts. Laura just blames everything on everybody else. She is a really ugly person. I am talking about on the inside. I have never seen her be nice to anyone. But anyway, back to my point, how do I stop Brittney from having to be around her without ****ing off my husband and his parents?? Please help, I am about to lose it!!!!