He smiled, the fact she was his sister meant little too him as she began to grind against him. "Mmmm..maybe I do," he admited, feeling her slit rub against him through her shorts. Her breasts where pressing into him, he guessed she had been planning this for a while. What kind of brother would he be if he didn't at least indulge her efforts. He smiled, grabbing her ass, feeling her firm little backside through her shorts. "I think...maybe you've been peaking on me more then just today," he said with a grin. "I never would have though....my baby sis would be such a little slut at heart," hee said, though he knew she had not been with a guy before, the idea of being the first to take her virgin pussy was exciting.