SD, just to be clear, your daughter would be the one calling her out on the behavior not you or your wife. It would be harder for the leader to play the victim card against a 16 year old that simply stated the facts vs you the adult. Yes it can still happen but there is less ground for the leader to stand on.
That is an option — it would be scary for a 16 year old, but it would be a good approach if I felt she was capable of asserting herself. We are introverts and usually think of the best thing to say 6 months after the conversation ended.
I was considering this option too. Haven’t ruled that out yet…