By that time, my cock was rock hard again. I reached under my bed, fumbled around for a second and eventually pulled a condom out of the box I kept down there. As I pulled myself up onto my knees in front of Lynne, she saw what I had in my hand and smiled wickedly. As I tore open the wrapper and began rolling the condom on, Lynne did something that surprised me. She sat up and then flipped over onto all fours, facing away from me. She grabbed my headboard with both hands and stuck her ass out toward me, clearly wanting me to take her from behind. To...