How did you find out and what was your response to finding out that your wife was cheating?

Can't say she was ever cheating since she had a hall pass from me since before we got married. However finding out she was actually using the hall pass was pretty exciting every time it happened. I had a good friend and room mate that had a green light from me to fuck her when ever he could get her to play along. Was always fun finding out after the fact that she had offered him some pussy when I had to leave to go to work. The first time she offered her pussy to a young security guy at her work that was flirting her up. He knew she married and got scared away when she straight up offered to let him fuck her. Next was when she told me her boss had been letting her watch him jerk off in his office and she would help by lifting her skirt and rubbing her cunt while he watched. He did not want to "cheat" on his wife by fucking her but loved to have her watch him jerk off. He did bend her over his desk on his last day there before he left for a new job. Told her he needed to know what it felt like to be in her so she bent over his desk, lifted her skirt and and let him pull her panties aside and slide in. She said it wasn't fucking because he did not cum in her....lol. She flirted with another co-worker for a few years and enjoyed his company on a work trip (no fucking that I know of). She found herself out with him and other co-workers after a work event and he walked her to her car. She said she wanted his cock and was so horny for him she took him bareback. I found out when she came home, told me she had been "naughty" and shoved her cunt in my face. Not sure how many times they fucked but my dick got hard every time she told me she was "working late". Those are a few. I'm sure their are details she has kept to herself. Despite my loving how much of a slut she is (love woman who love sex) I think sometimes she is embarrassed by her lust and likes to think of her self as a "good girl". To me she is the best.
 
I found out she had been cheating following a tip off from a workmate. I knew she had a boyfriend, or should I say, I believed she had a boyfriend who was a complete stranger to me. As it turned out she had been lying to me for a whole year, because, all this time she had been fucking two of my closest pals almost every Saturday night. One of my buddies, who was single, had his own apartment and that is where my wife went on her date night. My two pals indulged her in all manner of sex before she came home to me full of their cum.

I met up with my buddies every Sunday night totally unaware that both of them had been fucking my wife the night before. When I learned of this I confronted her and she admitted it. At my insistence, she went on to tell me the whole story with all the juicy details. I must confess to being angry at first, but when the lust kicked in it made me so horny that I actually enjoyed it.

As it happened she had already broke it off with them in order to avoid being found out, otherwise I think I would probably have encouraged her to carry on seeing them. That was years ago and neither of my pals are aware that I know of their secret.