It was strange being at the same party as my sister. We were twins and we attended the same school, but we normally hung out in different circles and our social lives almost never overlapped. We were more like acquaintances than siblings, we didn't hate each other but we weren't best friends either. Other than living in the same house, we didn't interact with each other much - she had her life and I had mine. So it was definitely a weird feeling when I showed up at Charlie O'Neill's house and saw that my sister was also there.
She was with her boyfriend, Dane, and some other people when she spotted me. She smiled and broke away from the group to say hi to me. She even gave me a hug.
"Eric! I didn't know you were gonna be here tonight."
"Hey, Sarah," I said. "I didn't know you were gonna be either."
"Well, I'm glad you are! We never hang out together."
As odd as it was for me, it was probably even weirder for her. She was part of the cool kids and this was a cool kids party. I was only there because my friend Brian was on the baseball team with a kid who was friends with the guy throwing the party. But I was a complete outsider. To my surprise, she was being super friendly to me and kept making sure I was being social and having a good time. But she didn't let having to take care of me stop her from enjoying herself too.
She was like a free spirit, pounding beers and dancing all over the place. She and her boyfriend were grinding on each other hard, and I have to admit it was pretty hot. I knew it was wrong to even watch, but I couldn't pull myself away.
My sister was wearing a crop-top that showed off her belly button ring and toned stomach. Her boobs weren't too big, B-cup maybe, but they were round and perky. Her best asset by far was her ass - she had a big, juicy bubble butt that jiggled when she moved, and she was wearing jean shorts that showed it off along with her incredible curvy thighs. Come to think of it, she reminded me of Remy LaCroix, my favorite pornstar (perhaps subconsciously because of my sister.) My sister was damn sexy. I know I'm not supposed to think about my sister like that, but it was the truth.
I found myself growing jealous of her boyfriend - I wanted it to be me who she was grinding her beautiful ass against. After another hour or so of lusting after my twin sister, I decided I couldn't take it any longer and needed to leave. I looked around the house for Brian so he could take me home, but I couldn't find him anywhere. I called his phone about five times - no answer.
A couple minutes later I got a text from him: "Sorry, I'm with a girl lol"
Great, now I was stuck here. I only had one other option, so I waited until my sister was finished dancing and approached her: "Hey, Sarah, do you mind if I get a ride home with you? My friend left me."
"Aw, that's awful!" She put her hand on my arm - a purely comforting gesture - but it sent shivers down my spine and made my stomach do somersaults. "But, yeah, that's fine. We'll probably leave around 2."
I checked the time: 12:36. Another hour and a half of watching my sister shake her ass. I'd be lying if I said I wasn't a little excited to watch her some more. When the time finally came for us to leave, my sister was hammered drunk. Her boyfriend, Dane, was driving us home, but we weren't the only ones in the car. There were six people in total, and there weren't enough seats for everyone.
"I can sit on Eric's lap," Sarah said. My head nearly exploded when she said that. "You don't mind, do you?"
"Uh, no, I guess that's fine," I stammered. I couldn't believe how this night was unfolding - none of it made any sense. I crawled into the backseat of the car and my sister climbed onto my lap, directly behind her boyfriend in the driver's seat.
I kept one hand to my side and the other on the handle above the window, all the while doing my best to avoid thinking about the fact that my sister's extremely fuckable ass was digging into my half-erect dick. The car hit a bump and my hand fell onto my sister's lap. Before I could move it away, she put her hand on top of mine. A few minutes later, she moved my hand between her legs. What the hell was she doing?
Another few minutes later I decided it was my turn to test the waters and so I started brushing my finger against her inner thigh. Then I moved my fingers closer and closer to her pussy. I could feel the heat radiating off her and onto my hand. But apparently I was moving too slowly, because she took my hand and shoved it into her crotch, pressing my fingers against her pussy. I got the hint at that point and began rubbing her harder and harder. I was essentially fingering my twin sister in a car full of people, including her boyfriend. It was the hottest moment of my life.
This went on for a few minutes until more people got dropped off and Sarah moved to the front seat. I was rock hard. When we finally made it to our house, Sarah made out with Dane for a bit before getting out of the car. I'm pretty sure she winked at me when she was done. I felt insanely jealous.
We crept upstairs to where our bedrooms were, doing our best not to wake our parents. Sarah got to her bedroom door first and leaned against it. "Goodnight, Eric. I'm glad you came out tonight."
"Me too," I said. She smiled at me and moved her hips slightly. I couldn't tell if it was an invitation, or if that was just my perverted mind. I chose not to act on it and went to bed.
I changed into my pajamas, got in bed and immediately started jacking off. I thought of my sister sitting on my lap, and I imagined we were both naked and I was sliding my hard dick deep inside her wet pussy. God, I wanted that so bad.
Suddenly, I heard a sound coming through the walls. Our bedrooms were right next to her, so the sound had to have originated from my sister's room. It started faint, but slowly got louder and clearer. She was moaning! She was masturbating, too - my sister and I were both masturbating, ten feet away from each other with just a wall between us.
I wondered if she was thinking about me, too. No, I know she was. I was fantasizing about my fucking her and my sister was fantasizing about fucking me. I jacked off furiously, while my sister's breathing and moaning grew louder and faster. Just as I was about to finish, my sister's moaning stopped.
I heard her door open, then I heard footsteps coming down the hall. She was coming towards my room! My door opened slowly and in stepped my sister. She closed the door behind her and made her way towards my bed. She was wearing an oversized t-shirt, her nipples poking against.
"Are you jerking off?" She asked me in a whisper.
"No," I lied. For some reason, I didn't want her to know I was jacking off. It felt too weird to admit to my sister.
"I could hear you through the walls," she said.
Welp, there goes that.
"Did you finish yet?" She asked me.
"What?"
"Did you cum yet?"
"Uh, no."
"Are you close?"
"Yes," I said.
"If you cum once, are you able to go again?"
"Uh, I think so."
"Good. Because I need to be fucked, and I need you to last longer than 30 seconds."
Before I could say another word, she dove back in, my cock disappearing down her throat. I had to bite down on my hand to keep from moaning and possibly waking up our parents.
"Holy shit, I'm about to cum," I whispered. "I'm right there."
My body gyrated and twisted as I shot rope after rope of cum into my sister's mouth. My legs shook uncontrollably as she licked up every last drop off my dick and swallowed it all down.
"Fuck, that was incredible," I said, trying to catch my breath.
"I know," she said. But she wasn't interested in my praise. "Now, go to the bathroom and drink some water and get hard again," she ordered.
I happily complied.
When I came back into the room my sister was lying on my bed, fingering herself. I stopped for a second to take it all in, but she wasn't having that.
