One makes a choice went contemplating an affair. I don't think calling it a mistake is correct. A mistake is me stepping on your toe. Or calling your "Bob" and your name is "Frank". An affiar is a choice. And a poor choice in my opinion.

And Ap. I don't think most people have an affair with the purpose of causing intentional harm. Of course that is the result, but I don't think it was the intent for many of us who made that poor choice. If my sole purpose was to hurt my wife I'm sure I could have thought up any number of nasty things to do. But think what you want. We are all evil. I actually stay up late in the night thinking of things I can do to hurt my wife. . . And I kick puppies too. And pinch babies.

What we think or what we know or what we believe is, in the end, of little consequence. The only consequence is what we do. ~ John Ruskin