Is the sneakiness of the WS's.
In my case, my Wxh and MOW thought that they were so fucking slick, that they had outsmarted Williesmom with their secret cell phones and late night hookups, and they could be together (secretly) in their lurve.
If they were so fucking smart, they should have both gotten JOBS so that they could openly pursue their lurve.
Shit like this will eventually come to light because eventually, the betrayed spouse puts a few pieces of the puzzle together.
Lurve is not permanent. It has a true shelf life of about 10 minutes.
I'm sorry for the profanity, but for God's sake - how about living a decent, honest life?