Can you afford a private investigator? The money spent ("invested," actually) might be well worth it in the potential divorce/alimony scheme of things.
There's a rat here. I smelled him from the beginning, and I continue to smell him.
Puppy
Puppy, I have no motive here other than saving my M. The separation we have agreed to includes no alimony and fair division of prop. In fact i will come out better.
In regards to contacting him i will wait till the separation agreement is signed as she will go berserk if she finds out and that may alter the landscape. But I will do it a a last effort.
The way i see it the only thing this can resolve is if he has no interest in that way ( which is doubtful as she is very cute and fun). given that how to phrase an email is the hard bit.
Given that I have not even the slightest shred of evidence it is hard to be threatening.