I threw my bag on the chair and ascended the stairs to my room. I lived in a two-story house with my sister, Anne, and my parents. Both of my parents were away at the moment so for now it was just me and Anne. I walked down the corridor and began to hear the sound of moaning coming from Anne's bedroom. I poked my head inside and saw her fingering herself, with earphones in her ears. Anne was a sexy bitch even though she was only 19. She had a perfect face, with long blonde hair and green eyes. She had B-Cup breasts and a perfect bubble butt which I wanted to fuck.
"Fuck me harder Daniel!" she screamed as she pushed her middle finger into her already wet pussy. Daniel was her boyfriend's name. Even though she was not fantasizing about me I could still feel an erection growing in my pants.
I pulled down my pants and began rubbing my hand up and down my shaft as Anne neared her climax. Just as she finished fingering herself, I cummed letting my semen fall to the ground. Quickly I ran into my bathroom and grabbed a paper towel before wiping up the semen and promptly pulling my pants back up.
I went into my room and lay on my bed, throwing the cover over me. My six-inch cock was still erect and it popped up in the bedsheet. I closed my eyes and began to fantasize that it was me she was thinking about but that was all interrupted when I heard my door creak open. I turned around instantly and saw my sister walk in sporting nothing but a black lingerie.
"What the fuck!" I exclaimed, trying to pretend I didn't want to rip the clothes off of her. She held up her finger which had about a drop of semen on it. I began to panic.