I did have to re-expose to my mother- and father-in-law two or three times, as they SO wanted to believe their daughter's contention that "he's just a friend," and my wife was spinning them pretty good. I just stuck to my guns, and really worked at keeping my relationship with them. But every time something new and signficant would happen (like my personally witnessing my wife meeting up with OM in a parking lot, and driving off with him), I re-exposed to them.
