Originally Posted by Hektore

I wish I had seen this earlier. All of my good friends are under explicit orders to sleep with my wife if the opportunity presents itself.

If my wife never sleeps with another man, I don't want it to be because of lack of opportunity, but because our relationship is more important to her than any lust she has for another man.

Maybe that's what's going on with our op's wife. She had some doubts and put her sister up to the task of getting him to cheat. Or maybe she was looking for an out of marriage she wasn't happy in. Plot twists abound.