My sister and I weren't really close, we just didn't have that much in common. She was three years older than me, and we never talked. I did, however, fantasize about her a lot. She was a gorgeous blonde with a great body and full rack. She kept it hidden though, for the most part.
She had gotten in trouble a few years ago for having sex with a guy at a party. Our parents were very strict when it came to sex, and they didn't even want us to kiss on the first date. I had never been on a date before, but my sister Jenna had dated plenty of guys. I knew she was the kind of girl who'd not only kiss on the first date but probably do a lot of other things too. One time I found a condom in her purse by accident, but I didn't say anything.
One night I heard Jenna crying in her room, after our parents had gone to bed. It was after midnight, and I had got up to go to the bathroom. Jenna had been out on a date, her first in almost a year. When I heard her crying, I was worried that maybe the guy had done something to her. So I knocked lightly on the door and opened it.
Jenna was sitting on her bed in her underwear. Her dress was on the floor, and she barely looked up at me as I walked in. When I realized she was almost naked, I stumbled a bit.
"Oh, sorry," I said nervously. "I heard you crying, and I was worried."
She stopped crying and smiled a little. "I'm fine, just a bad night."
"What happened?" I asked, closing her door behind me.
It didn't seem to bother Jenna that we were both in our underwear. She wiped her eyes and scooted over on her bed, making room for me to sit. I felt a little nervous sitting so close to her in her panties and bra, but she was obviously distraught over something.
"I went to a movie with this guy," she began, "and afterwards we started making out in his car. Then things started heating up, and he wanted me to suck his dick."
This was a little more personal than I was expecting, but Jenna seemed fine discussing her sexual encounter. I did find all of this kind of sexy though, sitting here in our underwear talking about sex. I was a little worried that if I got an erection, I wouldn't be able to hide it.
"I haven't had any kind of sex for over a year," she continued, "so I went ahead and did it."
For some reason, that got me hard really fast. It must have been the mental image of my sister sucking someone off. I shifted a bit and covered my lap with my hands.
"After he was finished, I wanted him to go down on me. Then the fucker gave me this look, like it was the most disgusting thing he had ever heard, and drove me home without saying anything. Like it was okay for me to do that to him, but he was too good to lick my pussy."
Now I was really hard, and I wasn't sure I would be able to disguise my arousal. My dick bulged inside my boxer shorts, and I hoped Jenna was too distracted to notice.
Jenna shook her head. "I was really looking forward to getting off, I guess it just frustrated me that I gave the asshole what he wanted but I didn't get anything in return."
I didn't say anything, and Jenna's eyes slowly traveled down my body until I saw her stare at my crotch. I was so embarrassed, she must have seen my dick tenting through my boxers. But her face didn't change. After a few seconds, she looked back up at me.
"This feels kind of nice," she said with a smile. "Just sitting here, in our underwear."
Was she kidding? Now I found myself looking at her rather full breasts, and even trying to sneak a peek at her crotch. I think she knew what I was doing, but she seemed to like it. And I don't mean in a naughty way. She felt really comfortable with me sitting here with her.
"Have you ever been with a girl?" she asked.
I shook my head. "Never even seen one naked before."
I didn't say that to be lewd or suggestive, it just seemed to fit the casual setting. Jenna smiled.
"Really?" She seemed surprised. "I know Mom and Dad don't ever want us to have sex, it seems like. But I think everyone should be able to have sex whenever they want."
"When's the last time you had sex?" I asked.
"About two years ago. I've done other stuff though, I even tried having sex with one of my girlfriends."
That really turned me on. I didn't do too much to hide my erection anymore, it seemed like Jenna was fine with it.