One day last spring, my sister Diana came home from college for her spring break. She had just broken up with her boyfriend, and was very lonely. Anyway, since it was only her college's spring break, I still had to go to school. One afternoon, I came home from school, and went downstairs to my room. And there on the couch in the downstairs family room, was my incredibly hot sister, lying there totally naked, with a dildo up her pussy. She was sliding it, in and out very slowly, and making low moaning sounds. I just stood there watching for about 5 min, until she orgasmed. It was the most incredible thing I have ever seen. After she was done, she opened her eyes, and saw that I was standing right there. 'How long have you been there?' She asked. I told her 'Long enough to get turned on'. And she glanced toward my crotch, and saw the bulge in my pants. 'Please don't tell mom and dad!' she begged. 'I won't, if you let my join in next time.' I said. 'Well mom and dad won't be home til later tonight, so lets do it now.' she told me.
So I went and sat down by her, and pulled off my pants. Then she reached down, and slid off my boxers. She grabbed my dick, and slowly started sliding her hand up and down it. It felt so good. I had never had someone else jack me off before, and it felt amazing. She kept pumping, and was getting faster, and faster. 'I'm gonna cum!' I cried out, and she got faster and faster. Then I suddenly let out my load, and it shot clear up and landed everywhere. Thank goodness our coach in leather. After I finished cuming, I told her I wanted to return the favor. So she laid back, and I got down on the floor, and began eating her out. I slowly licked around in her pussy, til I got an idea. I hurried, and ran up to the kitchen, and got some of that whipped cream in a can, and filled her pussy up with it. And started to lick it all out. She was moaning so loud, I bet the neighbors could hear. She started to shake, and tremble, and she went into an orgasm. 'Oh God!!!' she screamed out, as she had her orgasm. After it was over we were both sitting on the couch totally naked talking about sex, and our boyfriends/girlfriends. And that's when she said the thing I least expected. 'Give it to me Dave!' she said. 'Give you what?' I asked. 'You know.' she said. And she got up and ran to her room to get a condom. She came back and slid it onto my dick. I just sat there, thinking about what to do. As I was sitting there, she laid on the floor, waiting for me. I finally got up and laid down on top of her. I inserted my dick into her pussy, and started to go up, and down. This was the first time, I had ever had sex with someone, and it was my sister. Anyway, we were both about to cum, and I was going to pull out, just in case the condom didn't work, but she told me not to. 'I want you left in me.' she exclaimed. And then we both orgasmed, and I shot the hardest load I have ever shot before. It was totally incredible. After we were done, we just laid there, in each others arms. And finally decided to get cleaned up. And we took a shower together. And that's when she gave me the greatest blow job.