So much for best friend!
It's one thing to start sh** between friends, but not between their family. You shouldn't get people to yell at other people in your fights, it's just not right.
I had this friend who used to hit me and push me around and i finally got over it and pushed her away. She then got angry and started a fight. After all the times she did the same thing to me i never once said anything.
She has also told my other friend that she is ruining everyone's friendship because she is happy and no one else is. She is the one pushing all the people who have given her everything.
We stood up for her when no one else did. We were the only ones there when she lost everything. She doesn't understand that she is turning into the person she promised she would never be, and is pushing us away.