My wife volunteered me to help the mother of one of her friends. I was basically going to be doing some grunt work and literally getting dirty. It was going to be moving some bricks and dirt around in her yard. I got to her house and knowing I would be getting dirty brought a change of clothes. After I finished the work I was dirty and sweaty and asked if I could have a shower. I finished my shower, wrapped a towel around me and walked back to the room where my change of clothes was.

I was naked and still toweling parts of me off when she walks in on me. She stares at me, makes a comment about me being naked, tells me she can't take back what she just saw, sits down and says it was pointless for her to leave since she has now seen me naked. I told her it wasn't appropriate for her to stay. She tells me to not be concerned and to just get on with what I was doing because it wasn't like I was going to be more naked. I figured it would be best I just quickly finish what I was doing and get dressed. She watched as a toweled myself off. Her watching me was a little unnerving at first but soon I was getting a little turned on by it. I began to take my time and give her a longer show. She was intently watching me as I continued to towel off and grow below. I should have kept my cock covered because exposing a cock was one thing but exposing a cock that was rock hard was another. It was an even bigger turn on now having it exposed to her this way and her reactions to it. I finally did get dressed and had her thank me for the work that day. She added I was a very dirty boy for showing myself to her the way I did. I told her that she was the one who walked in on me. She said she wasn't complaining, and with a bit of a wicked smile and a wink, she was a very dirty girl. She told me it was fun show but her husband and my wife might not agree. That when I realized if this ever got back to my wife she would kill me. So far to date, and as far as I know, no one else has found out about this day.