Her lips were completely wet with sweat and I licked them, her sweat was as tasty as she was.I kept on fucking her and abusing her, talking dirty with...her for a long time. Then I got off her and turned her over, she screamed in pain as I pushed my dick in her ass.. I was also groaning because her ass was very tight. Once my dick was inside her ass, I reached around her waist and grabbed her boobs and then started fucking her ass. I was on cloud nine…doing doggy style with my sexy sister!She. Every now and then Kevin would glance at Cindy and thought she didn’t seem to be a happy camper.He turned his attention to listening to her thoughts to see if he could find out if there was a problem. It didn’t take long for him learn that Cindy was sexually frustrated. Apparently she and Russ were having unsatisfactory sex. It was occurring about once a week and was mainly oral sex only. Her having that low frequency of sex was not enough for her and she wanted it to happen more often.When she. I slowly slid my hands up the back of her thighs while doing so. When I got to her lovely ass it was time for my first surprise. Amy wasn't wearing panties. My hands claimed ass flesh as I kissed her pubic mound through the front of the gown. Amy decided that she wanted real contact and she pulled the gown up and over her head in one quick motion. I rewarded her boldness by diving into her pussy. I licked and kissed up and down her lips noticing her clit growing erect. I flicked my tongue. I didn't notice I was hard before, but I was, and i could feel he was too.I wanted to say something, but he calmly sat up and I could hear him pull down his boxer and throwing it away.Then he got back into the same position and our cocks touched without interference for the first time."Okay b*o, it's on then." he said, and I replied "Okay. come at me".There was nothing more to say, in the moment of silence we both accepted that this would be a fight cock against cock until one of us won.I.