I have to agree, I would strongly urge you to look into some kind of protective action. What she is doing is harassment. With the schools back up and the fact the the mother has also abused them I would think you have some sort of grounds. And if you can get one taking it to the new school I would dare say the other girl would have to go to another school one in her Zone!!!

This has frustrated me and Im not even involved so I can only imagine how you are all feeling. So is her complaint that your daughter didn't invite her to her private bday party? Cause if that's the case Im dumbfounded!