OK, so now you know how to do damage to the affair, do more of it... Just keep up the pace and keep pushing your wife.. don't let their secret run overlong... I would call OM and tell him to knock it off.. dont ask him if he's keeping is word, just tell him to get lost and you aren't an idiot.
He thinks you trust him and that he has you fooled... call him up again and talk to his wife, put some pressure on his end again... Don't let them play this secret phone game... call them on it