I have a problem, how should I handle this? My friends daughter A and my daughter B are dancers.?

They did a program with A's friend C together. C verbally abused the singer of the program who is a senior in profession for which my daughter B retaliated and asked C to shut up. Now my friend is organising a seperate program just with her daughter A and her friend C. Iam invited too !! My daughter B was to do a program with A and my friend is trying to stop it or postpone it. What should I do in this situation? Do you think I should continue this friendship? Am I wrong in anyway? I would be glad if she openly told me I do not want A and B to dance together. I think there is no value for friendship if we cannot discuss the problem directly with each other. My daughter B is right according to me. I do not want my daughter to dance with C but I just find it funny that my friend is trying to prove a point by arranging a seperate program for A & C and is postponing the program of A & B and 5 other girls. Is this not petty? She has not told me anything till now. How should I react?