Jackson lay down, spreading his legs for his sister. She was going to suck his cock, he knew. He also knew that, after the experience they had just shared, he was not going to last long. He knew now, from experience, that it was best that he go ahead and cum. He could recover in a short time. That was better than fighting against it. He may as well lay back and enjoy it. His sister loved to give him oral and didn't mind the taste of his cum. The only caveat was that he was to warn her when he was about to cum.

Jennifer knelt between his legs,...