I keep thinking about this one... this sounds like the beginning of an EA... so tread lightly... But telling her co-workers and such would likely get up to her employer anyhow...
Most companies I have worked for have a "silent warning" policy where you are taken aside in private and told to stop outright...
THAT may be enough to wake your spouse up... also, you could just start going WITH your wife to these meetings with OM. If the meetings ARE still casual maybe just interrupting the privacy would be enough...
If your WIFE gets defensive and protects her privacy.. you do have something to worry about... In that case I would speak with the OM even and ask him to stop seeing your wife privately...
Honestly, GROWN ADULTS should know better than to sneak around with another man's wife in private... its just RUDE.. even if there is no sex going on... its INSULTING
