Billy looked down her slender body. Her pussy was gleaming with wetness and he could see how swollen her clit was. He realized now that she was as excited as he was and, if anything, wanted this even worse than he did. It was even more exciting to him that she was pretending that she didn't want it. He loved this game and was willing to play along with it. He knew he had to be careful, though. He couldn't do anything that would turn her off to this. He couldn't hurt her - and he certainly did not want to hurt his little sister. Just because she was the...