Jeeesh ghost... I'll let the vets give you the advice. But man, do yourself a favor.. Unfollow her on fb. Trust me, I know from experience. As soon as BD happened, I unfollowed my wife and eventually blocked her. I wouldn't ask her anything about the post. It might have nothing to do with you and it would show her she still has you under her finger.
How do you go from a fb post to worrying about losing your share of the house??