When I got back to the living room, Chuck was still pumping his cock into his wife's mouth. My husband Jason had stripped and was waiting to fuck my sister with his hard cock. He was holding his cock in his hand keeping it ready. When I pulled out one of the vibrators, Jason stepped back. I motioned for him to use it on my sister's cunt, but he motioned for me to do it. I decided I knew more about what to do with it than Jason. I knelt between Kelly's spread legs. When I put the vibrator on her cunt through the light blue panties and turned it...