I was in the military, stationed in England. As I was single at the time and living in the barracks, there wasn't many opportunities to 'take care' of matters myself. I have always enjoyed masterbating either alone or with a female.
I became friendly with this young couple and they would invite me over to dinner fairly often. They were in their early 20's and had married just before coming to England. The wife was very sexy, short, about 5'1' and barely 100lbs. and flat chested, But a really wonderful looking ass. As I said we became close friends and many nights after dinner we would sit around talking and watching TV. One night it had got pretty late and they asked me if I would like to just stay the night instead of going back to the barracks. I of course said yes and they went off to bed and I settled in on the couch.
I woke up early and had a hard on. As the house was so quiet I decided to just have a good rub off. I was still dressed from the night before so I undid my belt and just pulled off my pants and underwear. I then started stroking. I realized that I really needed some sort of lube to help. I quietly got up and went to the bathroom. There in the medicine cabinet I found some lotion and decided to use it. I went back to the couch and filled my hand with the lotion. I was enjoying myself so much that I didn't hear her come into the room. In mid-stroke she suddenly said ' your dick is beautiful'. I opened my eyes and there she was standing above me. I of course had stopped my hand movements and covered myself with both hands. She then said please let me watch.
I asked her if she was sure and she nodded yes. I started stroking again and she knelt down next to the couch. I just leaned back and closed my eyes. As I was about to shoot, I looked at her and she was staring at my hard dick. I said I was cumming and did. I covered my chest and stomach. After a minute or two she reached out and touched my cum. She then raised her fingers to her mouth and tasted it. She then looked at me and said that she was so glad she had heard me in the bathroom and that she got to watch me cum. She then said it was our little secret and she went back into her room. I got up and went to the bathroom and cleaned up.
That was just the beginning of what turned out to be many times that we masterbated together.