This is grandma.(c) Notwithstanding any other provision of this title, no person shall be compelled to disclose information relative to his religious beliefs or to membership in a religious body.
Maybe Grandma needs to say privacy is her religion.
This is grandma....I don’t think that will fly, but she could take a vow of silence, including writing I suppose, in accordance with her faith. They can’t argue the validity of that belief, but they could inquire that she doesn’t really believe it.