.2....3...4...5.." I said. She moved her thick thighs and curvy legs up. She did a few sets of ten. Then she rolled over to her other side. I stayed i...n place watching her left leg come up. Her ass was moving perfect. I was afraid she might catch me drooling from watching her. I moved my hand over my cock. The thin material was making my cock feel great. I could feel the outline of my cock head inside my shorts. I was going to excuse myself to go to her bathroom. I had to help myself before she. Once, when I was sneaking a look, she reached down to adjust the crotch of her bikini and I caught a glimpse of closely-shaven dark brown pubic hair. I started asking myself if I was wrong to be so turned on by this situation; she was my big sister!! Then, as if on cue, she really shocked me: ‘No peaking, now! Promise!’ I glanced over to see my sister removing her bikini top. ‘I usually sun myself this way.’ I wanted to look but I just couldn’t; I opened a fresh beer and swallowed half of in. "Oh Cindy, he ripped my poor pussy open and I have a horrendous headache," she said as she walked with an exaggerated limp.I roared and Jeannie collapsed on my bed, rolling herself into a ball. It took several minutes for us to calm down but when it became quiet in the room she turned to me, serious again."You could have you know." There was stillness in her eyes, unwavering."Do you mean what I think you mean?"She nodded, her eyes gleaming. "Two summers ago when we were going to the cottage.. You, my man, are a stud," Joeassured him as they drank beer at the bar."Yeah, but I am not getting off. That's the problem," Frank said."Try pegging," Joe said seriously."What?" Frank said stunned."It's when a woman uses a fake cock and penetrates your ass. It's likea gender reversal," Joe clarified."I know what it is," Frank hissed. "Why would I ever do that?" It just might get you off," Joe recommended."Okay, but the point is to jack off inside her," Frank said."What does it matter?" Joe.