This goes back over 20 years ago. An apprentice who worked with me married a girl who was right out of high school. Over time we became close friends and I was often at their house before or after work. In his apprenticeship he also traveled across the country to our training center 2 or 3 times per year, usually for about 1 week at a time. During these times I would often stop by or at least contact his wife to be sure she was OK. We were all very close friends, even though he was about 11 years younger and she was about 14 years younger than I.
One time I told him about an experience I was going through. I had a vasectomy and was providing regular sperm samples until they declared me "clear". I chose to stop by the clinic and give it rather than bringing it from home. My first time there I went to get the sample cup and they offered me magazines. I thought that was just in the movies. I told her I didn't need a magazine, but it would help if I knew she was watching. They had the ability to do that since they also took samples for legal cases. This was the same person who had shaved my balls before the vasectomy, and we had already had a little laugh about me getting kind of hard when she did.
I told my friend that I was pretty sure they were watching me while I jacked off for the samples. I was surprised when he said he would never do that. I told him that he should masturbate for his wife and watch her as she did too. He said he could never do that.
He must have told her because several months later when he was in training, I stopped by and his wife mentioned it. She told me she had always wanted to see a man do that, but her husband refused. I asked if she would like for me to show her and she said yes. I sat in a lounge chair and she stood in front of me while I stroked. She couldn't take her eyes off of my cock. She slipped her hand into her shorts and was playing with herself, but she did not expose herself. When I finally unloaded, she seemed very excited. It was one of the hottest things I have ever experienced.
About 6 months after that when her husband was at a 3 day school, I stopped by again and asked her if she wanted to do that again. She said yes, but she wanted to do something else too. She said that she was very turned on when we had done that, but she did not have an orgasm, and she had never had one. She wondered if i thought I could give one, since I was quite a bit bigger than her husband. I told her I would love to, but I wasn't so sure the size was the most important thing. I told her I would like to stroke for her again, and watch her touch herself so I could see just how she liked to be touched. We laid side by side in sort of a 69, but without touching each other. I stroked and watched as she did until I got off, which didn't take long. She was really turned on, so i had her lay back while I started licking and kissing her pussy and clit the same way she had been touching herself. This went on for awhile, but no orgasm, which surprised me. I then slipped two fingers gently inside until I felt that little textured place I knew was her G-spot. i started to flick it while I gently kissed, licked and sucked her clit. Within a couple of minutes her whole body stated heaving and she was moaning. She was very wet, but didn't really squirt. She had a big throbbing climax and I nuzzled her clit until she completely relaxed.
Afterward I told her that it seemed like she needed G-spot stimulation to orgasm, but with a little work you could find how to do that with a cock, as well as with fingers. She said that maybe next time we would try that. Well there never was a nest time. As much as I liked it, I did feel bad that it was my friend's wife. Later she told me that I helped them learn a better sex life. I moved to another state not that long after that. I have stayed in touch, more with her than her husband. Now over 20 years later I learned that they are getting a divorce. I wonder what it would be like to go for a visit.