I reached down with one hand and guided my cock into her cunt. She was so wet, the first few inches of my cock slipped in easily.We both moaned and I ...new I had to stop or I would shoot my load in her before I ever got all the way in.Her eyes were closed and I felt the walls of her cunt spasming around my cock.I silently begged for her to stop or I wouldn't be able to last long enough to truly enjoy this.After a minute of thinking about anything else, I was able to resume moving and pulled out. When they finally did she had to stifle a gasp as she saw her precious teen age son laying on his back, his hands up over his head, with his thin sheet just covering from his knees up to below his belly button. She marveled at his chest, his developing abs, and his muscular arms. Mother and daughter stood a foot away from the bed, both frozen and unsure what to do next. They looked at eachother. Kathryn did her best to hide her excitement, telling herself this was only for her daughters. Time went on and it became more frequent and once in a while I or he would bring a movie over with good sex scenes. We did this so frequently we became very comfortable and eventually we couldn't help but make jokes about each other when we would get boners. Eventually you couldn't help but make the joke of wiping out your dick and swinging it around. Inevitably you couldn't help but examine each others dicks. His had a narrow thin shaft with big mushroom tip while I'm a bit bigger and. "Oh god," she whispered and got busy. When she finished and swallowed, I let her go rinse out her mouth and return to study. She was not a happy camper. We knocked off at midnight and I told her we'd screw later. She sighed her relief and left.Coach called me the following afternoon. "What in hell did you do to her? I learned her paper was graded with a B. The problem is, she looks like she just lost her pet kitty." I made her pay her dues." He gasped. "Just a little oral to take the edge off..