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.
Yeah well I mean the initial footage was her dumping her car off at a grocery store parking lot over night to spend the night with him. Anything else just shows there is an ongoing 'relationship' whatever they try to play it off as it isn't going to fly with anyone with the reasoning skills over 3 years old.
I think she is just doing whatever she wants to do and just doesn't care at this point.
"You can't reason someone out of a position they didn't reason themselves into."