Stop trying to get into her head and trying to guess what she's thinking. You have your own business to take care of, so let her take care of her. No letter, none. Do what is best for your sanity, and trust me, snooping after her is not best for your sanity, heck, it's not even remotely good for your sanity.
If it were me,'I'd un-friend her from the social media. But given the circumstances, I would at least unfollow her so that her notices do not show up on your wall.
