I am super confused.

A) If she were a family member, why would she not want you on her FB (granted, I have had to unfriend several family members, but I don't understand as it doesn't seem there is animosity there).

B) Why, if she is a family member, is she declining because of professional obligations?

I feel like there is a large part of the story we are missing. Maybe it would help us if we knew it.