Settling in, deciding rules

As the girls make up the bed for our new roommate, you just sit back on the couch to process everything that's happened. Your beautiful and amazing girlfriend Carrie revealed to you that she was open to anything, and she meant anything. So you tested it and now she is personally grooming her own little sister to be a live-in whore for your cock. She's totally into it, even stripping down on command to help sell it.

Your mind reels. This is insane. But that blowjob had been the stuff most guys can only dream about, frantically jerking off to low-budget porn. It's real for you, and you were only getting started. Carrie really would do anything for you, it seems. You start formulating an idea. A plan to take this much further. Just winging it is going well, but you would be the biggest idiot on the planet if you screw this up.

A few minutes later, you hear the shower turn on in the main bathroom and Carrie returns to your shared room, leaving the door completely open as she enters. She's still dressed in nothing but her bra and panties and although you'd seen her completely naked plenty of times it's still incredibly sexy to see her like that. Grinning from ear to ear, she darts to the couch and straddles your lap again to kiss you fiercely. "She's in the shower. I'm so fucking hot right now." She kisses you again. "I've done a lot of stuff, and I mean a lot, but this is different. It's so hot! Let's get you hard again, I need to fuck."

She slips from your lap to the floor and reaches for your cock but you stop her with a hand on her forehead.

"Ah, ah. You're not in uniform."

She furrows her brow, confused, and then brightens. "Ohh, you sly bastard. You mean the lipstick, don't you."

You nod. "Of course. If we want to train sweet little Cassidy properly, she needs a behavioral model. Someone to pattern her behavior after, someone who knows all the rules and can help make her feel okay with all of this. So for the time being, Carrie, you're my whore, too."

She doesn't seem to mind this slight twist one bit. Applying the lipstick with a practiced hand, she says, "Oh, okay. So you want me to be a good little whore for you so my sweet, innocent sister can follow in my footsteps and be a good little whore for you." She rubs her lips together and separates them with a soft popping sound. "You got it. You just let me know what you need me to do and I'll do it. Like I said already, I'll do anything." She wraps her fingers around your dick, stroking you a few times with a wide smile. "Now, I want to see if I can taste my sister on your cock."

Carrie wraps her painted lips around your half-erect cock and you make no move to stop her. With a contended sigh, you take a moment to just enjoy the moment. Within the space of maybe fifteen minutes, both sisters have had your dick in their mouth. That thought alone is enough to return your erection to full strength but when Carrie moves to rise from her knees, you push her back down with a hand on her shoulder.

"No, stay on your knees. Keep sucking that dick, whore. We have a lot of rules to discuss. I'll speak, you listen."

Her eyes sparkle with lust and she nods around your throbbing cock. She settles in for a much longer blowjob than she'd originally planned.

You lay down the rules as you see them. First, already explained, no clothing in the house. Underwear is fine, for now, but once Cassidy becomes less resistant, you may expect the girls to be naked in the house. Sexy lingerie encouraged over plain day-to-day bra and panties, but you're not going to punish anyone for their choices.

Carrie hums excitedly at the word punish, sending delightful vibrations through your flesh.

Next, you explain grooming. Keeping it simple, you just expect them both to remain free of body hair at all times. Brazilian wax. Landing strip optional. They should both keep in shape. You don't want unappealing bitches.

Carrie slips a hand between her legs and starts rubbing herself through her panties.

"And none of that. From now on you only get pleasure when it comes from my dick or at my command. You will be punished for that. If you catch Cassidy touching herself, I want you to report it to me. Bring her to me if you can. I'll let you assist in her punishment."

She whines a little but removes her hand, returning it to your leg.

You're out of ideas at this point, but it's a good start. "Oh, and of course, I think this should go without saying, but I expect both of you to be sexually available to me at all times. You will give me what I want, when I want it, how I want it. Or you will be punished. Understood?"

Carrie nods, slurping noisily on your cock.

"Good. Now lose those panties and get up here. I want to watch you come on my dick."

The sound of the shower cuts off with a slight squeaking sound and you smile as Carrie pops off your cock and stands to step out of her visibly damp panties.

"Ah, there's an idea. When I'm fucking one of you—yes, I'm going to fuck your sister, you didn't think this would stop with blowjobs, did you—I want the other one of you to watch, to be ready to participate if I want. Now mount up and call her in here."

Carrie shakes her head at you, grinning with surprise and amusement. "My god, you're twisted. Don't stop. I love it. Let's corrupt the shit out of my little sister. HEY CASS! COME IN HERE!"

As Carrie climbs up onto your lap in a cowgirl position, you smirk. You'll let Carrie believe she's meant to be just a model whore for her sister, but you fully intend this to be her official training. She might not even realize it yet, but Carrie is as much your whore now as Cassidy. She probably wouldn't mind. Carrie's into everything.

Your whore-girlfriend easily guides your rock-hard erection into her dripping pussy. She doesn't wait for her sister to show up before she starts rolling her hips, fucking herself in your lap. "Mmmm, yes... fuck me. I love your cock."

"Yeah? What is it?" comes Cassidy's voice from the hallway.

Carrie answers with a low, whorish moan.