Oh Dear... you really need to get control of yourself OIN...
If you can't collect intel with a level head, don't do it.
If OM made a commitment to not talk to your wife and he's talking to her anyways you may want to contact OMW just to check in... Just ask her how marriage is doing, offer some sincere interest and concern... find out of there's anything going on that end...
If you really have the instinct here that something may be escalating again... You could even tell OMW that your wife is doing research and that OMW would benefit from posting something on facebook for HER marriage indicating its stronger hoping this might drive your wife away... she may be hoping that marriage there is failing, I dunno..