Put the moves on your sister.

OLD RULES

The dress code requires female employees to be topless at all times.

It's common place for siblings to grow up sharing a bedroom.

The expression 'Boys will be boys' refers to the casual acceptance of the fact that teenaged men and young adult males have the uncontrollable urge to touch and grope the bodies of girls they find attractive.

NEW RULES

What Larry doesn't know won't hurt him: the Bedford family can do what they want as long as Larry doesn't find out.

Michael's dick is porn-o-rific

Robin's Rulebook--no touching!

"Yes, mother," you say with sober intent, as if your mom had just demanded you quickly fuck your sister. Robin--with her eyes still wide with surprise and her cheeks red from embarrassment or shame or whatever--gives you a quizzical, slow-dawning expression. "What do you say Robin? Do we have time for this?"

Robin inhales slowly, her modest chest lifting in your hands. "No, Michael, don't even--it was just a--" You lean in to give Robin a more passionate kiss, denying her the chance to negotiate out of this. You feel her try to pull back, to push you away with a flinching expression, eyes squeezed shut. Her back flattens against the door, her hips shifting to one side in an effort to slip away, but you've got her pinned.

Your hands squeeze and roam over Robin's little handfuls. As your mother's son, you've always been a fan of breasts, but honestly Robin's slim figure drives you wild in all sorts of ways your mom simply doesn't. Your hands tease and rub against her tits, thumbs stroking in tight little circles over her stiff nipples. There's a soft, throaty whimper as Robin kisses you back reluctantly, her lips relaxing and her eyes fluttering open as her big brown eyes regard you with a slightly cross-eyed expression. There's a subtle shift forward of her hips, grinding her smooth, fair skin against your massive erection. You've got her.

"Ok, you've got me," Robin says softly, batting her eyes.

"I know," you say--hopefully with the roguish charm of Harrison Ford. But probably not. You make up for lack of charisma by softly pinching Robin's nipples. She whimpers and squirms against the door. Apparently they're sensitive, huh? You tease her nipples between your thumbs and forefingers and watch her dance for you--against you--like something out of a wet dream.

"Goddamn, Mikey, you perverted monkey-fuck!" Robin exclaims, hands pressed against your chest as if trying to resist, but in fact doing nothing of the kind.

"Where did you two learn such language?!" Heather exclaims in a sharp, scolding tone. You glance over your shoulder to see your mother, cheeks red and eyes wide. Apparently you're straining the limits of her Rulebook-assisted denial. "And Michael, what do you think you're doing with your... your..."

Before you can think of a half-baked response, Robin's hands slip from your chest and roam quickly down your front. You shiver at the stroke of her fingertips, but nothing quite like the surprised convulsion as she grabs your meaty rod in her hands. You gasp and turn to face her. Apparently your dumb-founded countenance tickles her, because she laughs openly in your face.

"He's going to fuck me with this big-ol' cunt-stomping tally-whacker, mom!" Robin sputters between her horny chortles. No-no words be damned, apparently.

You may be inexperienced, but this is not the first time Robin's held a cock. She grips you with just enough **** to intimidate and control without being uncomfortable. And the way her thumbs tease against the side of your cock... it's hard to guess how it'd feel with your usual prick, but as it is you're basically putty in her hands. You slacken and moan as Robin's hands tickle your shaft, your own grip easing and then falling away from her sensitive nipples.

"Robin!" Heather hisses with compounded scandal and panic in her voice. There's an angry, frustrated stomp, and her voice pitches into deadly-serious notes. "Boys will be boys, but this is too much! He's your brother!"