All through my high school years, I worshipped the ground my beautiful sister Karen walked on. I wasn't the only one. Every guy in school wanted to get into her pants, but, as far as I know, all but one failed. Karen was a year younger than me and one grade behind. When I saw her in the halls between classes, I invariably got a hard-on. I don't think she was intentionally a prick-teaser. She dressed like the other girls but she filled her clothes out better than they did. For example, her ass was absolutely mouth-watering when she wore the tight designer jeans that were popular at the time. Karen made the cheerleading team with ease, even though she wasn't an especially good cheerleader. The coach wanted her on the sidelines to boost team morale.
After graduating from high school, I went to the State University. A year later when Karen graduated, she followed. To save money, she moved into my tiny one-room apartment. We didn't tell our parents about the arrangement. They would have been furious. It was cramped and I lost my privacy, but I certainly wasn't complaining. Having that sweetheart around had my balls working overtime.
One day after Karen went to class, I decided to take full advantage of the privacy with a nice jack off session. I stretched out naked on the bed, greased my cock, closed my eyes, and tried to picture myself fucking my sister. I was pleased with the mental image I managed to conjure up. It was the best one yet. Having her around had refreshed my memory of her tiniest features. The intense concentration needed to hold on to the mental picture must have blocked my sense of hearing. "What the hell are you doing, Marty?" I nearly jumped out of my skin. I opened my eyes and saw my beautiful sister standing at the foot of the bed.
I quickly pulled a blanket over myself. I struggled to find the words I needed for a plausible explanation, but there really isn't much one can say in a situation like that. "I'm sorry," was the only thing I could think of to say. "I thought you had a class." Incredibly, my cock had stayed hard and was tenting the blanket. Karen's big blue eyes were locked to it. Then her beautiful lips turned up at the corners. "The professor didn't show up. He's sick. Wow, I've never seen a dick that big. Let me have another look."
I let out a long sigh of relief. A smile appeared on my own lips when I realized this might be an opportunity to seduce her. As I tossed the blanket aside, she moved next to the bed and grinned down at my twitching tool. "Damn, that is big! You could be in porno movies. Have you ever measured it?"
"The last time I checked, it was just a hair under ten inches," I said.
"You were jacking off weren't you? That's what you guys call it, isn't it?"
"It's a lot more fun than having wet dreams," I joked. "You can touch it if you want to."
"Maybe just one squeeze," she said with a giggle. I thought I would faint when her soft hand encircled my cock and gave it a hard squeeze. "Please don't stop," I begged. But despite my plea, she took her hand away. "Oh, no, young man. You're just trying to get a hand job out of me. Tell you what. You can jack off for me. I've always wanted to watch a guy jack off."
I could hardly believe my good luck. I certainly would have preferred a hand job, but at least jacking off was a step in the right direction. She pulled a chair up next to the bed and paid close attention. I was afraid she would lose interest if I played around with it, so I decided to jack off quickly. After about a minute of vigorous pumping, cum shot all the way to my face. Karen giggled and clapped as she watched the fireworks display.
I lay there with cum all over me and waited for the guilt to hit. It didn't. "I watched Bobby cum once, but he didn't shoot that much stuff. He usually cums inside me, I mean in the rubbers I make him wear." I confess that I was disappointed that Karen wasn't a virgin. That eliminated one of my fantasies - the one where I pop her cherry. "How many guys have you fucked?" She held up one finger. "Bobby Campbell nailed me on Prom Night. He fucked me maybe thirty times during the summer." That hardly made her a slut. I was encouraged when she said, "Bobby doesn't have the kind of equipment you have."
The incident wasn't mentioned for several days. When I got so horny that I couldn't stand it, I went to her and asked if I could jack off for her again. "I can't see any harm in that, big brother. Take off your clothes and I'll be with you as soon as I finish this paper." I lay on the bed and stroked my cock while I watched her work.
