I've submitted two stories before about my solo encounters. This is, very possibly, my first M/F experience with masturbation. Although I don't know if she got off. This happened on World of Warcraft.
I recently started playing World of at the insistence of my brother on a Player vs. Player server. Boy what an experience! I was surprised at how humans can quickly become psychopaths on that type of server as they would kill the other side even if they are too low level for words.
So I created an account on Sisters of Elune (an RP server) to see how the other half lives. I first met Stormy (that's part of her screen name) when I was playing a girl paladin. Stormy at the time was attracted to the same sex. As time went on, she became attracted to my human image who I played with my real personality. She was still having problems with same sex attraction but she adopted me as her brother.
However, because of real life issues (she found out that I was really a guy, and her lover abandoned her) Stormy offered her toon to my avatar for Erotic Roleplay. But because she adopted me as my brother, I denied the chance for Erotic Roleplay with her. I had my character fall in love with someone else. Fast forward a couple of months when I stopped playing WoW because I wanted to concentrate on going to school. When I came back, I noticed that my character's lover had entirely disappeared. Blaming myself, Stormy contacted me again.
Again, she offered herself to me for Erotic Roleplaying. My character, having had sex before, could not resist and so we Erotic Roleplayed on WoW. During the ERP (which had nothing to do with Masturbation, but touching Home), I had gotten an erection. I told Stormy this and her reply surprised me.
'Just take care of it and pretend I'm there.' So I whipped out my penis and jacked myself at my computer. When I came, I began wondering what she would actually do to me if she was. Eventually, I learned that the real person behind Stormy fell in love with me. She eventually told me to think about her while jacking off at night.
I told her that since she is so in love with me, that she can buy a dildo and masturbate with it in order to pretend it was my penis. I now jack off to that memory, not wondering but with the confidence that she would give me a hand job, a blow job, or actually mount me. I felt overwhelmed and started thinking about how to convert her to nudism/naturist since I'm dead set on marrying a nudist girl.