Home Alone?

I'll never forgot my first time. I was about 14 years old. I had just taken a shower and was lying down naked on my bed on my stomach. I was hard and was merely rubbing myself lightly against the sheet. I was home alone. My parents were both at work and my sisters were out, so there was no reason to close the door. All of a sudden, I heard someone walking up the stairs. I became nervous and having no time to jump up and get dressed, decided to pretend I was sleeping. It turns out it was one of my sister's friends who had walked in.

As the climbing became closer and louder, I felt a feeling I had never felt before. There was a pulsating feeling between my legs. I couldn't control it. It felt incredible. I couldn't move or make a sound, because I had to appear to be asleep. When I was certain that the coast was clear, I lifted myself up and there was a little puddle of sticky white liquid on my sheet.