Honestly, I still can't believe it!
This happened about three months ago. My step-daughter Amber, who is eighteen, is 5'5', 135lbs, she has small breasts and a tiny butt and she is very cute. I have noticed her from time to time looking at my penis, but when I turn to see her she pretends she wasn't looking.
Anyway, one morning, let me tell you what took place, to my great surprise. My wife goes to work right around 5:30am in the morning and Amber gets up around 7:00am to get ready for school, and I normaly get up at the same time she does to go to work. That morning I was sleeping when I silently woke up to someone touching my penis, softly, like they were trying not to wake me up. At that moment I did open my eyes just enough to see, and pretending I was still sleeping saw Amber caressing my hard penis over my underwear.
She then took it out carefully and started to play with it with her face really close to it, like examining it. Like I said I was very hard and I was able to feel an explosion of cum starting to build. From time to time, she looked into my eyes to see if I was awake and continued to softly stroke my fully erect penis. She then started to breathe hard, but I couldn't see if she was touching herself, and after a few minutes my dick exploded with what I could feel was a large amount of cum. Trying to stay calm and keep pretending I was still sleeping, she left my room and twenty minutes after, I got up to take a shower.
When I saw her she seemed normal but she wouldn't look in my eyes. Up to this moment nothing has been said and nothing else had happened again. But I have to admit that I still feel this is not right but it was a great pleasure.