L.W.
I'm sorry, but I would have done exactly what you did. I tend to not tolerate little bullies. It's unfortunate that at least one of the mothers is just like her daughter, very immature, but if given the opportunity, I would find some kind act for the mother in an attempt to raise her above the pitiful existence she must be in to have raised such an insensitive child. Kindness is the best remedy to ugliness.