It was getting hard to keep up, at times Justin was feeling drained of cum, but some how he always had more left just for his sister. It was no surpri...e though since he had waited years to fuck her this much, and her amazingly tight pussy was never tiring. She even asked to have her hands tied to her ankles so her face was pushed up against the ground, and her ass was forced to be perked up, and reveal her pussy to her brother more. The fact that her thighs were pushed together made her even. The fact that he could satisfy himself by doing something other than fucking her never seemed to even cross his mind any more than the notion that she might have hoped for something out of the exchange as well. Katie had learned not to speak to him at times like this, and to in fact never refer to it at all, because it would only turn into an ugly argument that would spill over into every aspect of their relationship and at this point even the illusion of intimacy and connection that was. I thought she was kidding so I took a can of Red Bull out of my computer desk drawer and watched as Wendy smiled and fed it into her pussy while I watched. That got me hard again.She let me pull the can out and slip my cock in. Surprisingly her pussy closed up around my cock and it felt good. At least I got to fuck her for a longer period of time.Wendy sat up and told me that I could play with her boobs if she could play with my cock and balls. Okay. Her breasts were soft, warm, and firm all at. I thought the only way out of this was to give him a hand job quick and hope he would cum before he could drag me onto his cock. I just sort of pushed him back on the bed and squatted over his face so he had to suck my clit and I grabbed his cock and furiously masturbated him as fast as I could pulling his skin right down and back probably far too hard as he was almost screaming in pain hehehehe, what a bitch I was, jerking him off and rubbing my pussy over his mouth and nose so he could hardly.