This was a game to her, and he wanted so badly to make her stop, but it just felt soooo good. He couldn't. His body froze up and he looked down. What he saw was his hard dick, standing straight up towards his face and his sisters smiling, giggling face right next to it, singing "Babbbbby brotherrrrrr..." while her fingertips gently and slowly moved up and down... up and down on his hard dick. He looked over at her ass, trying to take his mind off of what was happening. She stuck her butt up ...