Mom just shook her head and laughed at the pained expression on my flushed face. "I guess that's one thing you do take after your Father about then," ...he mused as she watched me reach further into my jeans to grip my cock harder, "He always did like my bottom." Standing back up, she folded her skirt and put it with her blouse on the dresser before returning to the bottom of the bed to stand in front of me. "Take a good look, hon," she said, "This is what Mom looks like at the end of the day. Standing there totally stunned I couldn't move any more as he now started to outline the obvious bulge that was now starting to form in my pants. It took a few minutes more of his running his hand back and forth over my crotch before I realized I was getting a hard-on. "That's okay" he said as he noticed my look of surprise. "Does it feel good?" he asked. I just stood there, not sure of my feelings when he now reached up and unzipped my fly, slowly reached into my pants and rubbed my cock. " Well… it's sort of like… he's marking her with his scent. I've done it with you girls before, when I've used your breasts to cum." Can we watch another movie?" Sonja asked."Of course."I selected another video, a basic somewhat muscular guy fucking a generally attractive girl. It wasn't POV, just pure generic pornography."Everyone plays the same way we do!" Chloe giggled.Momo's slender fingers then found my zipper. She had noticed how hard I'd become. I pushed the computer further down my lap. She lifter her tit up and sucked the hard nipple up into her mouth and really started rubbing harder and faster on her pussy. I was speeding up too and I knew I was not going to last long. Then Grammy opened her mouth and let out this long groan that I could just hear through the closed window. She slapped herself between the legs a couple of times real hard (hard enough I could hear it and then she grabbed herself real hard and started shuddering.That was all I saw, because I started cumming.