As if she had had enough, she calmed right down and slowly opened her eyes. She looked up at the window, right into my eyes and a look of contentment... came over her face. She then rolled onto her tummy with her hand still buried in her crotch and lay there quietly.I slowly and as quietly as I could, backed away from her window and walked back to my rig. My hands were shaking as I tried to pour myself a drink. What had I just witnessed? Why did I stay there spying on my grand daughter doing. Often during the day I would find myself looking when she would bend over and every time I saw her naked breasts dangling down from her chest. At one point the top of her robe opened completely and I saw both of them but only for a few seconds before she calmly closed it. Naturally all this had me in a very excited state and I often had to adjust myself to keep my erection from showing.Towards the end of the day Mom invited me to sit with her. She was on the edge of her bed and the front of her. Taking small steps, she crept her way to her room and stood there staring in disbelief. Ross was standing by her dresser. On the floor were a pile of her panties… and on the bed another small pile. “Throw them out” Ross pointed to the pile on the floor “you can keep those ones” “Like fuck I will… get the fuck out…” “Ok” Ross did not argue… he just gently pushed Susie aside from the doorway and returned to his room shutting his door behind him. Susie for a moment thought that she had won then. Gayle’s expression went from smiling to intent, as if concentrating on something inside her. Well, Bill’s cock was inside her. If Bill saw what Greg saw, he was hoping that Gayle was concentrating on his cock.Then Gayle frowned. Bill’s strokes were harder, and they seemed to be shoving Gayle incrementally toward Greg. Greg would love to take her, especially when she was looking like this, but neither Gayle nor Bill looked like they’d appreciate the offer.Suddenly, Gayle slammed her loins.