I sit back a bit, revelling in my ability to make him cum. It gives me great pleasure to know that I could give him even a modicum of satisfaction tha... he just gave me. His cock is still semi-erect. The ache between my thighs has returned with a vengeance. Just as the thoughts of what lay ahead begin to flitter through my brain, he sits up and grabs me roughly by the arms. He flings me on the bed and flips me over, so that I’m lying flat on my stomach. He leans over me, his growing erection. When Nathalie was standing there, I gave her a closer look. She had very slender and sexy legs. She looked very sexy in her new skimpy outfit. Not that my sister didn't look good, she also had nice legs, but hey, she is my sister, and I can see those legs almost every day.Then we started our second special game of the day. Illiana and I decided we would try to get them exposed as much as we could. We had agreed to try and put the white ball on the table so that Nathalie, or my sister, always. “I get spanked Mother.” “How?” Another spank and another gasp. “You make me bend across the stool and spank my bare bottom Mother.” “Do you know you earned yourself this spanking?” Another spank and this time a small sob. “Yes. Sorry Mother.” “Oh you will be my girl, you really will be” she said firmly. I knew she was right. Another spank which landed on the top of my leg which I raised as the sting lasted longer than before. I could see Mum, upside down, with a small smile. She. Tracy couldn’t see what it was, but could feel a little nub pressing on her clit once they had it strapped on her. Then, they made her get back into the cage and secured her legs and arms to it, so she could not move. Then the cage door was closed and locked with a padlock.Linda said, “Ok, let’s try the new toy out,” and she flipped a switch on a box. Tracy jumped as best she could and then began to shake. Her clit felt like it was on fire from the vibrations it gave her. But it soon stopped.