In my case, adultery would very much change property settlements and many other aspects of a potential D. That would also be H's motivation for lying/pretending to work on the M while just having gone underground with OW.
Another concern for me is that H worked for many years in a profession where high-stakes deception was part of his job. It was for a good purpose at the time, but I am concerned about his abilities and how he has now used them against me. Sometimes I wonder if the thrill of the A was partly reliving the 'good old days'...
But like I said, I have found that I'll only drive myself crazy by thinking about it, so I don't - but I try to not be gullible, either.
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17