Our room was on the second floor, after Rob and Claire’s room and next to the toilet. I made my way up the stairs and as my head became level with t...e upstairs floor, I was gobsmacked by what I saw. Rob was stood outside our room with his shorts around his ankles and his cock in his hand, wanking slowly and methodically. His cock wasn’t as long as mine but was still a good 5 or 6 inches and quite thick. I was totally shocked and not sure what to do, I just ducked down and watched him, wondering. I could see he was close. "Auntie, I'm gonna cum!" he shouted. Mom's eyes shot wide open, and she tried to say "No! No! No!" but Dan's dick muffled her words. Dan held her head and fucked her mouth. "You're gonna drink whatever comes out of my cock, understand?" Dan exploded in Mom's mouth. She went limp, swallowing the cum with glugg-glugg sounds. I couldn't take it either. I masturbated furiously, and was close. "Mom, me too!" I groaned. Dan turned Mom around. "Open your mouth for your son,. My principal would like to talk with you about a part in a movie he is planning. Would you be free for lunch today?" Well, I did have some plans, but nothing that I can't reschedule." Good. Adolpho's at one?" Yes, I can be there." Excellent. Just give the hostess your name, she will know to expect you." Oh my God" Mary Jane thought as she hung up the phone, "A part in a movie. I wonder if it is a speaking part or just a walk on. Hell, I don't care. It is exposure and it could lead to something. Her cunt walls, wet and hot, gripped my cock like a glove as I started to slide my rod in and out of her slippery snatch.“That’s it baby… Fuck me… Fuck me good… Fuck mommy good and hard!!!”Between her moans, my previously prudish and very proper mother continued to spew out streams of whorehouse filth which she had not ever before indicated she was capable of. Whether this was a result of what she heard on the movies or not, I didn’t care, but her words turned me on even more causing me to.