Have you ever been accused of having an affair with someone?

My wife just did and it was crazy. You see I am into photography, and my favorite subjects are female models. One time my friend and I explored on doing a nude photoshoot and we went around town inquiring about models who do those sort of things. We finally got one model and booked her for an hour, so to cut the story short I had my first taste of shooting models nude. And as a memento of my first photoshoot, my friend volunteered to take my picture using my camera of course, with the STILL nude model dangerously close to me. So that was that and we all went our separate ways feeling good. I never really told my wife about it(my first mistake ), coz I was thinking "what harm can it do" right? Until she saw the very same picture my friend took, with just me and the still nude model(I didn't erase the pics on my card, my 2nd mistake), looking really happy and cozy. Well I won't go into details how she reacted, you probably have an idea. Anyways have you ever been accused of having an affair and it's totally not true? Who accused you, and how did you get out of that mess? For the record, I cleared my name on this incident.