I went up to my room to change my clothes after a hard night of work at the go-kart track. I started to take off my shirt and heard a noise from the direction of the wall that connects my room to my eighteen year old sister's room, where I have a door to a closet that we share. I went to the closet and opened the door and found my younger sister with Dad's camcorder.
"Mary, what are you doing?" I said.
"Nothing, Dorsey."
"What are you doing with Dad's camcorder?"
She looked at it like she didn't even know she had it in her hands.
"Nothing," she said.
"Nothing? Why do you have it in the closet?"
"Just testing it," she said.
I noticed light coming from a hole in the wall, behind a poster of Briana Banks on my wall.
"Were you spying on me?" I said.
She laughed. "That's crazy. Why would I do that?"
"Maybe you wanna watch me take my clothes off."
She made a disgusted face. "That's gross. You're all sweaty and stuff."
But her eyes glanced at my crotch, where I had an erection pushing out the front of my shorts.
"Maybe you want to watch me jerk off," I said.
She looked horrified and shook her head. I just smiled and went back to my room and closed the closet door. From that side of the picture of Briana I couldn't tell if she was still there, but I didn't care. It was too late to go back. Just the thought that she wanted to watch me jerk off got me very aroused.
I took my clothes off slower that I would have if I didn't think someone might be watching. I turned my back to the picture when I pushed my shorts down, then I turned around slowly, listening for any reaction, but I couldn't hear anything.
My bed wasn't in line with the poster of Briana so I moved the chair from my desk and sat facing the poster. If she was there, she could see everything. I went slow to make it last, and when I finally came I made sure to let it shoot as far as I could.
When I was done I got my towel to take a shower and pretended like nothing happened. If she saw any of it I couldn't tell. The next time I saw Mary she couldn't look at me without blushing. I decided not to make anything of it and just let her have her little thrill.
* * * *
From that day on, whenever I knew she was home I would go up to my room to put on a show, wondering if she was there behind the poster, taping me with my dick in my hands, shooting cum all over my room. Once in a while it was obvious and I knew she was watching. I would go up to my room for whatever, maybe just to do homework. A minute later I would hear her run up the stairs. Then it was time for me to do my job. Where any of this weird stuff was heading I had no way of knowing, but I didn't care about that.
Nothing happened until the day a girl came over to see me. Mary let her in and I didn't even know she was there until she knocked on my door and came in. She was wearing a halter top and tight jeans that rode low on her hips, well below her bellybutton.
"Hi Dorsey. My name's Amber. I'm here for one thing," she said.
"One thing?"
"I heard you got a big dick," she said.
"I might."
"They sent me here to find out," she said.
"Who sent you?"
"The other girls."
"What other girls?"
"The ones who were too chicken to come here," she said.
I laughed. "What do you want me to do?"
I was growing hard in my jeans and I was sure she could see it because she walked over and started to unbuckle my belt.
"Why don't you let me see it first, then I'll decide," she said.
She got my jeans open quickly, like she'd done it a few times before. My first thought when she got them down to my knees was for my sister. I looked at the poster and wondered if she was there, and if she had enough tape for everything that was about to happen.
Amber looked surprised.
"The girls are going to like this," she said, and put my dick right into her mouth.
I groaned. She licked the sides and moved her mouth slowly over the end. She didn't get much of it in her mouth, but then I didn't expect her to. I'd only had one other blowjob in my life, from an older woman, and she told me I had a lot more than a mouthful.