I’ve caught KK, indirectly a couple of times before we started the hot wife thing, when she was cheating on me - once during graduate school, after she had too much to drink, and got locked out of her car after a fuck session, and again, after I got a tip and followed her to the home of a massage therapist she was fucking.
I’ve walked in on her twice, and watched for as long as I thought I could get away with it, and did not tell her after the fact. Once was with her high-school ex, who had come through town on travel unexpectedly - I came home from work early, and caught them in the act. The second time was with a designer/contractor who did the remodel of our second master suite bathroom. They were “christening” the shower together after spending time doing tequila shots - my wife had him on his back, squatting over him, pissing on his erect cock.