My mouth fell open as I watched and Cindy chuckled."I told you," she whispered. "They do this all the time."After several minutes of kissing, Brad put...his hands under his sister's top and fondled her boobs. She pulled the top off, tossed it onto the bed and watched her brother's hands on her breasts. Her brother bent down and started to suck one of her boobs and she smiled, holding his head.Brad's hand went to the panties, but she knocked it away. He said something to her, she shook her head. It was the tank that I knew was filled with warm water. When she came back out of the tank she again called out “Failure!” This time she was yelling, and this time she did go to the top and stay there.It took three more cycles for one of the other two slaves to break. I was watching where they were being dropped and now they were going from freezing tank to hot tank to freezing tank. I expected the black girl to break first, but it was the thin nordic who called out “Failure!” after her third. But that night, at that moment, in an instant that lasted forever and just a few heartbeats at the same time, I burned and froze, raged and mourned, laughed and cried, lived and died and lived again.Do you know what this is, dumbshit? What you've been so eager to get rid of? This is power! This is what makes you superior."You're wrong about this making me superior."Am I? Everyone has feelings. But how many can take those feelings from another? How many can give feelings to another? How many can. She loves it when I suck on her tits while Im fucking her. It always makes her cum twice as fast. Fuck my slutty little pussy! She yelled in between a moan. Remember I told you she likes to talk dirty. This only made my cock harder and my thrusting deeper. Oh God! Your cock feels so good, she would yell out. I fucked her for a few more minutes deep and hard until I was getting ready to cum. Im going to cum in your tight fucking pussy! I put every ounce of energy into my thrusting as she began.