I have my own opines about 'revenge' and I doubt anyone else cares about them, but I would recommend only posting pictures of your own on FB with a very obvious and quite large 'watermark.' Might even be wise to do that most places, at least when the work is some of your better efforts. Copyright protections aside, there's no point in giving away you work.
Sadly, my only solution would be to kill her with kindness, in person, in public, on FB, etc. It won't hurt you and it may help her see her actions for what they are.
Obviuosly, I also ask that you do what I
say and not what I
do...