.." she slurred. "You got a firm ass, it is so muscular and shapely..." she said as she caressed my ass.I tried to lift her top off. She smiled and to...ok it off herself. She opened the buttons of her skirt and it dropped by itself.My sister was looking like a goddess. She did not have bib boobs or a large ass which attract me normally. But she had a very proportionate body. Her boobs were absolutely firm and were large enough to fill her bra. They gave suggestions of spilling out of it. She had. Mom’s naked boobs were in contact with my bare chest. Had this been any other woman in the world I would have been in heaven but this was my mother and I was made further nervous knowing that people were watching.The director then shouted at us to mimic fucking and also throw our underwear out of the sheet. Mom pulled out of her panties and stuffed it into my mouth. I was surprised by what had just happened and threw it out of the covers. I too removed my undie and now we were both naked. The. She was making crazy faces but no sounds but I didn’t give a fuck. I ignored another, “Easy!”I was fucking her all over the bed. As I her head began piling into the headboard I turned her over the side of the bed. She was falling off of the bed when she grabbed the corner wall nearby. Her big old tits were shaking and her gorgeous body was in full show for me as I pounded her until I came. I came inside of her but in a condom unfortunately. I would have loved to have filled up tight. As she walked to Frank I could sense without looking that Ken was staring at her ass. She had to lean at the waist to reach where he was sitting, making her ass pose nicely to our view. I turned my head to Ken quickly and 'caught' him staring. He smiled a kind of sheepish smile and I laughed, "What were you looking at?" He started laughing, too. We were like a bunch of k**s, and just like k**s there was an underlying tension in our laughing while thinking about the forbidden. When Tam finished.