Billy laughed and looked up at her face. Wow, what a beauty she had become! His little sister was the hottest girl he knew and she was loving this. Did life get better than this? "Did I do something you liked, Amber?" he smiled.

"You know you did! Do it again! Don't ever stop doing it!"

Billy went back to his task with great gusto. He suckled her clit, flicking it with his tongue as rapidly as possible. Amber groaned and thrust her loins toward his face, but he had her bottom firmly in his hands to keep her from bucking too hard. He squeezed her bottom as he ran...