Swapping My Wife for Her s****r - Sex Stories

Swapping My Wife for Her s****r

... slowly lowers her head and her body goes limp. Breathless, the two paused for a second to allow Sarah regain her composure. While all this was going on I was using my thumb to rub my raging hard on through my swim trunks. I briefly thought about pulling out my cock and rubbing one out right there, but this was the first time I'd ever seen another couple fuck right in front of me and since my wife was part of that couple I figured I'd just as well fuck her once Tony was done. Then it came to me, Catherine was still there! I was so busy watching this other guy fuck my wife that I had briefly forgotten about her. I turned and looked over at her sitting on the deck chair that her husband had left her on. She seemed to have a different frame of mind about the whole situation. She had a stunned astonished look on her face as she watched her husband fuck her s****r right in front of her. Neither one of them had asked her if it was ok and neither one of them cared if it was ok, they just went and did it! I looked at her face and for a split second I felt a little bad for her, but after that split second I looked at her gorgeous flowing brown hair, then her beautiful brown eyes and then I focused on those full soft lips. My eyes moved downward and I gazed at her full D cup tits that I had been staring at all day. My cock jumped in my shorts and all thoughts of pity quickly dispersed. My eyes then took a long look at her long lean legs. I thought to myself I've jerked off to this ...

... girl many times and if I was ever going to get a chance to fuck her it was now or never. I was certain that Catherine saw me gazing at her out of the corner of her eyes; however she didn't return the look. Her eyes stayed focused on her husband fucking her s****r. I looked back at Sarah and Tony. She was now on her back with her legs spread wide with Tony on top of her rapidly ramming his cock in and out of her pussy. His balls were slapping against Sarah's ass with a frantic FWOP FWOP FWOP sound. It was Tony's turn to grunt with pleasure as Sarah's pretty blue eyes focused on his long lean body ramming away at hers. Knowing that the two of them were busy at the moment, I knew this was my chance to act. I stood up, quickly stripped off my swim trunks and walked over to Catherine. Approaching her from the side, I knew she saw me, but she didn't turn to acknowledge me until I was about a step away from her. When she finally did turn to look at me, her big brown eyes were at the same level as my cock. Slowly her gaze turned upwards from my cock to my chest to finally she was looking me in the eyes. In one sudden move, I grabbed her, squared her to me and pushed her back onto the deck chair in which she was sitting. Offering some resistance to my advance, Catherine initially tried to verbalize a protest as a muffled, &#034NO!&#034 tried to come out; however I quickly kissed her to ensure I wasn't interrupted by her husband or s****r. Using my chest to pin her down and while I was ...