Sorry, but I belong to the "If I'm going to go down, I'm going to go down having given it my absolute best shot" school. One can point out all the limitations and reasons why "it'll never work," but I personally felt a responsibility to my family to PROTECT it. OM/OW are PREDATORS, and I felt -- reasonably, I think, considering how destructive affairs can be -- that my, my family's and even my wife's finances, emotional and even physical health were at risk.
I make no apologies, and when my wife ended her affair she thanked me for doing so.