I had just come home after two years abroad at university. When my stepsister Carole phoned to ask if she could stay at my flat for a couple of days I agreed, as we had been quite close despite the six-year age difference.
I barely recgnised her when she arrived as she had grown into a lovely, sexy young woman of seventeen.
As we hugged each other I felt immediately aroused and tried to gently push her away but she clung to me her body rubbing against mine so that she could not help but feel my now full erection.
That night I took her out for a meal and later we sat together on the couch watching some movie on TV. I was not really paying much attention to the movie, instead I was thinking how sexy Carole looked and began to get an erection. Suddenly she reached her hand across and touched me through my pants and smiled. 'Do you I turn you on?' I nodded, hardly able to believe that my stepsister was actually touching me like that. Without another word she stood up and said 'Well, why don't we do something about it?'
'You're my sister,' I protested and she just smiled. 'We don't need to go all the way, we can just wank each other.'
I was shocked, surprised and turned on as she started to undress in front of me. She was even more beautiful naked. Her body was slim and pale with small pert breasts and hard pink nipples. 'Come on,' she said and I stood up and started to undress.
Both of us were naked now as she took my hand and pulled me toward the bedroom. As we tumbled onto the bed the encircled my erection with her small hand. She started to masturbate me and I reached between her slim thighs, she was so wet that my fingers slipped easily into her and she groaned softly, 'Yes brother, make me come.'
There was no way I was going to last long and told her so but she just smiled and said, 'I've fantasisied for the last three years about doing this.' I groaned and ejaculated powerfully over her stomach and thighs. This seemed to trigger her own orgasm and her body stiffened, arching upwards, and I held her tightly feeling her young body shudder then she cried out loudly as she came. Her orgasm seemed to last for a long time and finally when it was over she hugged me.
Later she told me that she had dreamt about doing this ever since she had secretly watched me masturbate when she was fourteen.
That was ten years ago and we still have masturbation sessions frequently. Neither of us has ever expressed any desire to take it further and both of enjoy a full sex life with our respective partners.