She was my best friend of about 10 years. We did everything together. Even once in a while we would masturbate on the phone together. Never phone sex but just talking about masturbating and listening to each other cum.
Well it was a summer night and I was with all my friends in the hot tub. Having to watch all the girls in their bikini's including her, was driving me insane. I couldn't wait for everyone to leave so I could go masturbate to my thoughts. Then my best friend decided she wanted to sleep over.
She didn't bring any clothes to change into so she slept in her bikini bottoms and a t-shirt.
Laying next to her in my bed knowing she was not wearing very much was getting me so horny. I finally just told her I needed to masturbate. She told me to go into the other room but I saw my chance. I said no I was doing it here but only if she joined in and she masturbated too. At first she said no and kept telling me to go in the other room. But finally she said fine and I watched her hand go down her pink bikini bottoms and her hand start to make circles. I began to stroke my extremely hard cock. She kept on asking if I was close while she was going faster and faster and her breathing was getting faster and faster. I was holding myself back until she came. Finally the words I always wanted to hear her say in person, ' O MY GOD I'M GOING TO CUM' and now I was too.
There was a moment of silence and then I was the first to speak. I said how I needed to go clean myself up. I went to my bathroom and wiped myself up. Walking back to my bed she past me and said how she was sooo wet and needed to clean herself up too.
To this day we have never done it again but I still think about it almost everytime I cum.