If I really think about it, I think it is possible that W never really wanted to leave. She wanted me to just be ok with her having an A with an OW. She actually suggested that when she had the one time A more than a year before the bomb.
I couldn't go along with that and she knew it, so I think she tried to ignore her desire while it festered inside her (coupled with being encouraged by Bad Friend) until she couldn't ignore it any more.
Just a thought for a Sunday Morning.
M35 W37 S9 D6 M12 yrs Know 15 yrs Bomb 1/28/07 My Sitch Failure is the opportunity to start again more intelligently - Henry Ford