I'm not sure she should have said anything about it even if she does have a solid source - which I'm not 100% convinced she does. She has contacts but I doubt she's as best buds as she'd like everyone to think.Personally I don't think that Lady C should have outed Anne at all. In my view that was a big misjudgment.
I'm sure every single member of the family had reservations about Snarkle. Naming anyone will inevitably cause a backlash in the media.
Anne is a strong lady and would probably take one for the team to take the heat off Charles but it seems really unfair.
However Gayle King certainly also has an agenda to make everything seem as dramatic as possible and that this interview is single handedly going to topple the monarchy and the Commonwealth.