I'd prefer he try to keep how he knows a secret or try to make it sound like he heard/got this information elsewhere. Earlier in the thread I was suggesting he hint or imply that OM's wife supplied him this intel which would have the added shock value that he has been communicating with OM's wife and then carefully watching her reaction to such information [a fully active wayward would HAVE to tell OM this juicy tidbit of news as fast as possible].
I once told my then-wayward wife -- when she pressed me for how I knew (DEMANDED would be more like it) -- "I'm not going to say. Besides, I promised her--- I mean I promised this person I wouldn't betray their trust." (emphasis added)
And then walked away, leaving her guessing who the "her" was. A little paranoia thrown into Romantic Intriguing Affair Land as a bit of infidelitus interruptus never hurt.