Yeah, I wouldn't involve any of her family AT ALL.
And, yep, she will just say that she has been long time friends with this man. I'm guessing that they will play you out to being a controlling, overly jealous, paranoid husband. They know you have this footage so they realize that if they stop now it would look like there WAS a relationship. But, since she is being OPEN about it it MUST be just a friendship you see.
