My mother remarried when I was in high school. The man she married had a daughter, Chrissy, who was just a few months older than me. In the fall of my senior year, my step-sister walked in on me masturbating in my room. She was entranced which lead to several sessions of me masturbating for her and then her masturbating in front of me. From there we moved on and she gave me a blow job a couple of times, followed by me eating her pussy. We both got pretty good at oral sex with the guidance of our loving sibling. As winter approached, we started fucking each other.
My step-sister and I had been having sex of one form or another for three months, almost every day during the week. Then I started dating Suzie, a hot little cheerleader at school who I had had a crush on for several years. At the same time, Chrissy started dating my friend and ice hockey teammate, Roger. To make matters even more interesting, Roger and Suzie had been a couple the year before and had been "fuck buddies" (not a term that I knew at the time -- this was many years ago) ever since.
There were days when, after our parents left for work, Chrissy and I would have sex at home in the morning then we would each fuck our partners later in the day. This was not a secret. Much to my surprise, Chrissy had told Suzie (they are friends) that she and I were having sex. Of course Suzie had told Roger. So basically we were all very comfortable with his odd little i****tuous (in more ways than one) relationship.
On new years eve the four of us were going to a party. Roger and Suzie live just a couple of blocks from each other and a few miles from Chrissy and me. So I drove with Chrissy and we picked up both Suzie and Roger and we went to the party. This was the usual high school party; someone's parents were out of town and so people who were in some social set (like the hockey team and extended friends) partied there, drinking and smoking dope (never my thing).
The party was fun. I had my new girlfriend on my arm. Everyone at school knew Suzie because she had been a varsity cheerleader for four years. She was short, with big tits and she was very athletic having been a gymnast when she was younger. She had a cute face and longish blond hair. Chrissy was about average height with a nice body, C-cup tits and dirty-blond hair. Her best feature was her face which was cute, but most importantly she was always happy -- one of those people who brighten a room when they enter.
At about 11:00 Chrissy gathered the four of us and said she wanted leave. It was snowing out and she did not want to be on the road with a bunch of drunks driving in snow after midnight. So the four of us went back to Chrissy-and-my house because our parents were away for the night and for New Years Day as well. We put a movie in the VCR and coupled off in the family room which has a very long couch and a couple of chairs.
Suzie and I were on one end of the couch and Chrissy and Roger on the other. Suzie, never a shy one, took out my dick and started stroking me. Chrissy saw this and did the same to Roger. Then, looking Chrissy in the eyes the whole time, Suzie slid off the couch and knelt in front of me. With Roger and Chrissy watching, she started sucking my dick. She was really making a show of it. She would lick it up and down, making sure to position her head so Chrissy and Roger could see all the action, then she would take me deep into her mouth. She would back off and grab my dick at the base and squeeze up so a drop of pre-cum would ooze out of the head of my dick, then she would stick her tongue out and slowly lick it off.
Chrissy and Roger were transfixed. They were not really doing anything other than watching. I was getting too close to cumming which I did not want to do just yet.
"I think we all have way too many clothes on." I announced. We all stood up and clothes went flying in every direction.
We had all seen each other naked (well, maybe not Chrissy and Suzie), but it was incredibly erotic to have four naked bodies in the same room, everyone horny and ready for sex. Suzie grabbed both me and Roger by the dick and pulled us towards her. Then she got back on her knees and sucked me, then Roger, back and forth. Chrissy was digging this.
"Yea Suzie, suck-em both." she said enthusiastically.
Chrissy's eyes were wide and she started masturbating as she sat on the couch. I don't think Roger had ever seen a girl masturbate. He looked at Chrissy pleasing herself and I literally could see his dick swell in size from the excitement of it. Suzie kept pulling us in until Roger and I were hip to hip and she had our dicks an inch apart. She would suck me, then Roger, then run her tongue simultaneously over our dick heads that were an inch apart.
Then Suzie put both of our pricks in her mouth and sucked our mushroom heads at the same time. If I had thought about it ahead of time maybe this would have freaked me out, but it felt pretty damn good being in her mouth and feeling Roger's dick against mine. This must have turned Chrissy on because I could not hear squishy noises as she stroked her pussy.
After a few minutes, Suzie stood up and she kissed me and also kissed Roger. She held Roger's hand and pulled him towards herself. At the same time she pushed me away and towards Chrissy.
"We want to see you two together." Suzie said. "The thought of the two of you having sex -- brother and sister -- it makes me so hot I can't stand it."
Chrissy stopped fingering herself and stood up. Took her hand and brought it to my face; I took her fingers in my mouth and sucked her pussy juices off them. Then I put my arm around her waste and pulled my "sister's" body to mine. I leaned down and kissed her passionately. My dick was against her stomach and her breasts were pressed into my chest. As we kissed I began to run my hands over her body. I cradled her ass cheeks, then her breasts.
While we were making out, Suzie kept talking to the room. "Look at that, they're brother and sister; he's feeling her up."
