Read up on Sandi's posts on wayward wives - the affair fog is talked about a lot in those.
From what I hear, it can be easier to clear the fog on a wayward husband. Us guys are a bit more simple than the female kind. Emotional attachment happens with wayward wives. I'm no expert, though. Someone else will likely have a more educated answer.
If it is a MLC, I do know those can go on for longer. The search for the fountain of youth is exhausting.
M46, EXWW46 M15 T17 D20, S19, D13 M - Addiction since 1998 W EA/PA #1 2013/2014 W EA #2 June 2015... BD 1 Big D talk 9/15 BD 2 - EA/PA disc 10/30/15 Served D 1/22/16 Divorced 5/25/16 (yes, that fast!)