It happened 10 years ago this week.
My wife was at work and I was home on a day off when my best friends wife came over to use my computer to put in a resume, she was petite 5'5" 120lbs long red hair and small breast. Although my best friends wife still was a connection and she was telling me about how neglected she had been over the years and one thing lead to another and we ended up screwing right then.

I never told my wife I mean that would be stupid of me, but she needed up telling her husband when they got a divorce a few years later.

He confronted me and being the friend he is he said he wasn't going to say anything to my wife and has not.
she still don't know and I needed to get it off my chest so I posted here.