When I was 12, amd my brother was 16, I would do things for my brother and in return he would let me play his video games. One day he was being a bit rude about it and refusing to let me play at all. I tried to offer him everything I could think of to get him to let me play games. He refused every offer.

I got frustrated and went back to my room. As I lay in my bed wondering how to change his mind. Then I had the idea that if I offered to jerk him off, he would change his mind. What guy wouldn't like that deal.

I went back to his room and made the offer. He turned to me suprised. "How desperate are you to play my video games sis?" He asked me. I said, "I am very desperate."

He turned completely around and was only wearing his boxers. I could see the buldge of his hard on. He said, "Are you desperate enough to do more than jerk me off?" I looked at him for a minute then answered. "I will do whatever you want me to do."

He sat on his chair and pulled boxers off, tossing them to the side. He said, "Then suck my dick sis." I was young, naive, and just plain foolish. I knelt down in front of his and gave my first ever blowjob. I probably wasn't very good but he blew a big load and I swallowed most of it. A few minutes later I was happily playing video games.

That night as I lay in bed thinking about what I had done, I realized that I could probably get anything I wanted from my brother just by sucking his dick. I decided that it was a very good trade. I liked sucking my brother's dick, loved the taste of his cum, and honestly enjoyed the whole idea.

Now, several years later, he and I are practically fuck buddies. Our relationship developed from brother and sister to trading sexual favors and now we just have sex for the fun of it.

Almost every day he and I find some time to have sex or at least get some oral sex in. Just yesterday, I had sex with my boyfriend while my brother's cum was still inside me from just 20 minutes earlier. We had almost been caught. My brother shot a massive load in my pussy, then left to go to work and just 2 minutes after he left, my boyfriend pulled in the driveway. I wiped out as much of my brother's cum as I could then went to lay on my bed. My boyfriend walked in to me laying naked on my bed. I immediately seduced him and skipped foreplay to keep him from seeing the cum spilling from my vagina. A short while later he came in me and I was relieved in more than one way.