Curtis, those messages sound very much like someone who wants to "teach your W a lesson" for some reason. Maybe it's one of the OM's wife, or another girlfriend competing with your W for OM's affection. Or possibly a coworker. In any event I would not respond to them anymore, and you might even consider blocking them. They want to stir up drama and are hoping you'll take some kind of action. I am pretty sure you will hear from them again when they don't see the fireworks they are expecting.
