"I won't if you won't." Derek said with a smile. This was way too much to make her stop. He had little experience with girls but pleasing his sister was something he enjoyed. As he felt around her crotch, he felt the piercing that she mentioned and smiled. Her gasps and sighs signaled that she was enjoying it as much as he was. Though he had never had any personal experience, he had read enough websites to know how to please her.<br/><br/>Now he was going to try something he had never done before. While kissing her neck again, his finger crept inside of her pussy. It was a lot warmer than he imagined as he moved his finger around hoping to please his sister so she would do stuff for him later. He moved it in further and started to rub it harder and faster. He prayed that this is how you did it...