This past weekend I came home from school a day early to find my usually prim and proper mother wearing only a garter, stockings and heels with two of my closest friends spit-roasting her in the family room. I was astonished as I watched from the doorway Alan pounding my Mom's pussy from behind as she slurped on Billy's big cock. Alan was working her over pretty good and suddenly grunted as he came in her. He slowly pulled out and she concentrated on making Billy cum. He came in her mouth and she gagged swallowing his load. I got out of there without them seeing me. I spent the night with an old girlfriend before going back home the next morning. Mom was her old self, sweet as can be, and gives me a loving hug. We talked for a while in the kitchen and my eyes glazed over as I got a hard-on imagining her pretty mouth on my cock. She didn't notice and nothing happened over the weekend, but I am obsessed with the idea of having sex with my Mom. The fact that she is a total cum slut to my buddies still blows my mind and it only fuels my fire to fuck her.