an incredible stroke of luck
I go to the local pool for a morning swim 2-3 times per week. It's never very busy so even though I go by myself, I use the family changerooms since the families get must get there later.
The family changeroom has separate changing booths with a shower in each. It's much better since you can take longer showers. There are two stalls that I try to use because there is a small gap between where the partition ends and the back wall starts. The back wall is shiny tile so you can see a reflection of parts of the other stall. I have been lucky before and seen women showering.
This time was better. When I got into the stall I took a quick look at the back tile to see if I could see anything good. I knew there was a woman in there because I could see her flowery canvas sneakers on the floor since the partitions do not go all the way to the floor. What I saw was a woman who was doing the exact same thing as me. She was peaking into my stall using the same technique!
I pretended that I didn't notice. At first I was annoyed since I was hoping for some voyeuristic thrills but then I had an idea. I started to remove my clothes to shower and went through the motions. I could see her watching me. Then I spent quite some time washing my cock. Then I started playing with it. slowly at first and then really hard. I came in about a minute. I know she watched the whole thing. As I was finishing drying off she left. I started to worry about getting in trouble but I decided that I was safe. When I was walking through the lobby area of the pool I saw a woman who had been reading some sign on the far wall start to leave too. We reached the doors at the same time so I held the door for her. We made some small talk on our way out to the parking lot. Then I knew it was the same woman. The same shoes. I know she had seen my shoes too. She must have waited until I came out so that she would able to put a face to the whole experience. I could hardly speak but she was not mentioning anything. We parted where our cars were parked in different areas and that was it.
This happened over a week ago, and I have jerked off daily reliving the experience.
PS She was probably early 40s, slim, dark hair, pleasant looking but no stunner.