Andrew grinned. "Much better." He always enjoyed their little games that they played. It kept things real and fresh. Their desire for each other certainly had not diminished over the years. A true testament to that spark that had always been there between them. He let his eyes roam over her nude form like they had done countless times before. He would never grow tired of her body. His grin broadened as she pivoted and sunk to her knees in front of him.<br/><br/>He let out a soft moan as her hands found his hard cock, which only grew louder as her tongue eventually seeped out to lick against its head. His cock slowly began to harden and lengthen as she continued - they had certainly done this enough times for her to know exactly how to get him hard and excited.<br/><br/>Outside their door, Peter continued to watch. He had always wondered what it would be like to have his dick sucked and his mother certainly seemed to be quite good at it. He quietly unzipped his pants and slid out his hardening cock as he settled in to watch in secret, unaware that his sister was quietly approaching as she tried to sneak out of the house once more.