With my girlfriend we have a friend from high school who visits us from time to time. We usually go out for an evening, get back home pretty late, eventually have some coffee and go to sleep. In the morning we both leave the house to work and she leaves after us whenever she needs and wants. She usually comes for studying purposes and has some duties in the afternoon.
Some time ago we got back home quite late, after midnight, so went directly to bed. My girlfriend had to get up sooner than usual and I promised to get up with her. The guest stayed in the small room we have and we stayed in the living room.
In the morning I was very much in the mood and wanted to make love but my girlfriend woke with a terrible headache so it was obvious no sex was going to happen. Even when we have sex very often, I still like to masturbate and she knows it. Sometimes we even do it to each other, so I have no problem to do it in front of her. That particular morning she touched me and stroked my penis for a while, then I partially covered myself and continued to masturbate while she left to go to the bathroom. When being alone I uncovered again because it was quite warm under the blanket moving like that. In a minute she got back to pick something up, so she caught me and reminded me we had a guest. But I knew our guest usually sleeps until noon so I didn't take care that much. I was really very horny, moving all around the bed and when the sound of water in the bathroom stopped and a door opened I expected my girlfriend coming back and helping me to finish, even her presence arouses me a lot while jerking off.
I heard a noise still in the same position on the sofa and then our sleepover host appeared in the door. It was bit of shock and I ejaculated directly. She stared at me for some seconds, then said sorry and went back to her room while my girlfriend came in and started to laugh, looking at me out of control and perhaps still cumming, saying she told me to be careful. It wasn't bad but I had a problem to say hello to her-we knew each other for years but something like that never happened between us.
Next time when she arrived I almost forgot this event, but we came to it during our discussion and I turned significantly red. She told me not to be ashamed, because she knew her boyfriend did it too, though he disliked to talk about it. I replied it was a pity, because I consider it natural (even itÂ´s not usual doing it in front of our friends). Then she asked me how often I do it and we spent a long discussion about sex, so finally it was good for something.
When we got home we had quite noisy sex and I am sure she masturbated. I did it for myself again in the morning but this time safely under the blanket.