A.H.
I am so sorry that you and your daughter are going through such a hard time. I'm not going to tell you to keep trying to build your daughter's confidnece, obviously you already know that. I do agree that enrolling her in a activity that she could do without her cousin would be great. And I totally understand the problems with your sister. I have a very similiar story. My niece was actually scaring my daughter and told her a story that caused her to have nightmares for a very long time. I had to just stop letting them be around each other. It wasn't worth all the problems it caused. I didn't tell my sister about my decision, we were just very busy, and just never seemed to have to time to come over. I know that it may seem silly I just didn't feel like fighting with my sister and it wouldn't have done any good. She like your sis, just erupts and nothing ever changed. I would also feel very frusterated about the school situation, you picked this school and are paying for it, your niece shouldn't be the rason your daughter is having problems. What you might try to do is have the school counselor and thier teacher get involved and help you. Have them observe the girls interacting and then call a meeting. If your sister has to hear it through a third party that has the interests of both girls in mind it might help her to see that there is a problem. Good luck!