Dd has had a long standing bestie, they've had a lovely friendship, and shared lots of other friends in their class.
Recently though, dd is getting pushed out and her bestie has joined forces with three of the friendship group and is constantly being mean to her. Earlier on the bestie prank called her, and then hung up. She said that the other girls asked her to tell them when she'd done it, and to phone them all. Dd was upset. Not crying or making too big a deal out of it though.
I'm friends with the mums so don't want to upset them and I'm sure they've no idea, but should I take it up with them? Or should I just see if blows over? I'm so sad for her.
AIBU if I contact them?