Stunned and not quite sure what to say, I pointed to the opening in the blind, stepping back allowing the girl to get in front of me and peer into the...window. She was so close; my breasts were d****d over her, with the weight of them on her shoulders. I had not removed my hand from my crotch and continued to rub myself.I could see the reflection of the girls eyes go wide seeing her mother being fucked by my dad on his desk. She stood immobile and did not stop watching. I felt her breath become. Lily let go of alexs hand and pushed him back into the seat. "What are you doing?" Alex asked. lily turned around and bent over slowly showing alex her ass and wiggled it slowly before standing back up seductively. Lily sits down on alexs lap facing him and began to grind her hips into alex. Alex swallowed nervously as he felt lily grind her hips against his crotch. "ssshh...." lily said and put her index finger on alex's lips. Lily leaned back and arched her back and kissed alex while gyrating. The next game was close at the end so I aced the serve and prepared myself for what was next. She smiled at me and did one of the sexiest little dances as she took of her sports bra and I saw the tits that I was staring at all day. They were the perfect size in between being too small and too big. I could barely stop staring as Lauren giggled and told me to stop staring but that was proving to be impossible as her little nipples were pointing straight out. We played another game but I was so. It was pointless. The finger that had applied the goo was busy spreading it around her tight hole sending waves of sensations up her lower back. When the finger finally found its way in, there was nothing she could do about it. To add to the humiliation of being so intimately penetrated she found herself enjoying it. Her anus was relaxing quickly and the initial discomfort of being unwittingly opened was giving place to a warm sensation that turned her on even more. She was orgasming again, her.