Take mom's ass of course

How could you pass up an invitation like that? Your father is probably three beers deep by now and no chance he comes up. Robin is probably still gossiping, but won't think to look for you in here. You kiss your mom and then spin her around, bending her over the bed and pulling her shorts and panties down. You spank her ass hard then spread her cheeks. She moans in delight. "Yes, fuck yes. Take my ass and make me your slut again, Michael."

Who's, that was unexpected. You always saw your mother's submission to your father, but it always seemed to just be the public sort of submission to her husband. You never would have guessed that she was a hot sub looking to be dominated in the bedroom. Jackpot. Your going to milk this for all it's worth.

You grab her hair and pull back, making her arch her back as you remove her plug and position your head at her slightly open hole. She moans and wiggles her ass for you, pushing back to impale herself on your cock. Fortunately you're still wet from her masterful blow job and as you push you slide right in to a very satisfied moan from your mom.

"You like that mommy? You like it when I use your hot ass and ram my cock in it?"

"Oh FUCK!" She yells, clearly turned on even more as you mirror her dirty talk. "Yes, yes baby. You're so much bigger than your fa-THERRRR" her voice raises as you start thrusting, hitting deep inside her. She grunts a few times before continuing. "The few times he would fuck me, I was imagining your cock inside of me instead of him. I've dreamed that you would come back to me but never dared get between you and Robin."

"I'm sorry... You had to put up with... That negligent loser... "Another squeal tells you that talking down about your father is also a turn on for your kinky mother. "Not giving you the attention... You deserve" you say in between thrusts. "I'll take care... Of Robin... you just worry... About taking care of my cock."

She's getting caught up in her lust and is getting loud as she gets closer. You're getting closer too. Fortunately your parents' normal room is in a far corner of the house and the double pane glass should keep the sounds in. "Oh fuck, you know just what I need. Harder baby HARDER!" She screams.

You tug her hair tight and spank her ass. "I love hearing my sexy little mommy slut begging." As soon as she hears 'Mommy slut', she cums hard on, dripping into the bed and you feel her ass clench down on your cock. It triggers your own orgasm, and you explode in her ass. She screams again. You can't tell if it's another orgasm or a heightening of the one from moments before, but it doesn't matter.

You pull out of her, and before too much leaks out, you push her knees on to the bed and make her put her ass in the air. You tell her to hold that position. You wait for her gaping ass to slowly close, then put the plug back in, locking your cum inside her. She moans gently. "Thank you sir," she says before she lowers her body down to the bed exhausted. You replace her panties and shorts and tell her to rest up, but not too clean the bed at all from her cumming on it. You kiss her and she kisses you back in a very un-motherly way before she falls asleep.

You grab your bags and rulebook and close the door behind you as you leave. You think about a bigger plan as you make your way to your room. You always shared a room with Robin when visiting, but you're happy to find that with the new rule the two twin beds you always had have been replaced by a single queen. You put the bags over next to the closet and sit on the bed.

Old rule: When a man finds out he's been cucked, he becomes submissive to the man that took his wife.

That should set you up should your relationship with your mother come to light, at least with your father. You ponder solving the question of Robin's reaction with another rule, but first you want to see if you can pull it off without any more help from the book.

You jump in the shower and ponder what to do next.