Both of them

Would they "get the attention they deserve?" What were you thinking? You chide yourself. As Jesus himself said, what they deserve is to be objects for your pleasure, and you've decided that it would please you to use them at the same time.

"Hi, Laura. Andrea. Happy birthday. I'm here to use your sexy bodies. Both of them," you add. You pause expectantly, waiting for the sisters' reactions.

The 22-year-old Laura responds first. She flushes, looks to her sister and then back to you. "Wait, really? John? I guess you're 18 these days," she continues, looking at her sister thoughtfully. "I can't believe I'm going to be used by a guy my baby sister's age. My boyfriend isn't going to be happy."

"I'm sure he'll understand," you say smoothly, utterly disregarding her concerns. "Andrea? You have any questions before we get started?"

Put on the spot, your cute barely-legal neighbor tries to sink deeper behind the book she's reading. "I, um... Do- I mean, what, ah... what do you mean 'use'?" She finally stammers out.

How to explain? "Well, you know how a..." you grope for an analogy, "-a hammer is a tool? With a purpose. To hammer things. You pull it out when you need it, use it, then put it away?" You pause, waiting for Andrea to nod slowly, then you continue. "Well, your bodies are like that. They're objects. And their purpose is to provide sexual pleasure to me, specifically." Thank you Jesus. "And since I'm in serious need of some sexual relief, I'm taking both of you off the shelf, so to speak. And then when I'm done with you, you just... go back to living your lives. Mostly," you amend lamely, remembering the longer-term instructions you gave to Irene and Emma.

Andrea looks thoughtful. "So, you do whatever you want to us, and then when you're done, we can go back to studying?"

"That about sums it up," you agree happily.

"You don't have to stop studying," Lisa butts in. How long has she been here? "John said that you should be able to concentrate while he's using you." That's not at all what you said, but okay, sure.

"Yeah, that shouldn't be a problem," you agree, looking back at Lisa. Sure enough, she's hovering at the side of the room as if she's planning to watch you use her daughters.

"So you're going to- to use us while we study," You see a flush climb up her neck and face. "And I guess I... don't have a choice, do I?" she asks softly. Is she... getting turned on by the idea?

"Nope. Tools don't get to choose when and how they're used," you confirm.

Andrea shudders and bites her lip. "Okay. Um. How would you like to use my body first? Sir?"

"Hmm." You are loving this. "Why don't we start with getting those clothes off. Take off your shirts and bras." The two sisters put down their books and start following your instructions. Andrea begins unbuttoning her white blouse, and Laura pulls her tight long-sleeved shirt up and over her head. The older sister immediately continues on to undoing her bra, and is making intense eye contact as she reveals her breasts. She's not as obvious as her younger sister, but Laura is clearly turned on, too.

Andrea, meanwhile, is red-faced and panting and she's only revealed her bra so far. It's light pink, with just a little lace around the cups, and it proudly displays her much more ample C-cup chest. She reaches back to unhook it, averts her eyes, and drops it on the floor atop her discarded blouse and tie.

"Oh, Andrea, put that tie back on." You don't want to completely lose the look of the schoolgirl uniform, after all. "Laura, take your pants off."

"And then get back to studying," their mother butts in.

"Actually," you counter gently, "Laura may as well stay standing. I'm not quite ready for her to sit back down yet."

Lisa quickly acquiesces. "All right - but as soon as you can, girls, focus on your schoolwork."

Tall, slender Laura peels her tight jeans off, revealing the legs that you've fantasized about for years. You're seeing far more than you ever did before - her creamy thighs all the way up to her little lacy thong. You glance at mom - she doesn't seem scandalized. You wonder if there is anything you could do to her daughters to scandalize her, besides keep them from their homework.

Laura is standing there topless, wearing nothing but her little lacy thong. "Laura, turn around for me. Andrea, stand up please." They meekly obey. The younger sister stands up, wearing nothing above the waist but her uniform tie, revealing that her furious blushing extends down to her upper chest. Her perky C-cups jiggle gently as she moves. Meanwhile, Laura is displaying her taut ass proudly and looking over her shoulder at you, eyes smoldering. Two sisters, so different in so many ways, but both meekly submitting to your every word.

As your gaze lingers on her daughters, you can feel Lisa vibrating with impatience, and you start to feel some impatience yourself. Let's turn up the heat as you finish conducting their undressing.

"Great panties, Laura. But I need to see Andrea's. Pull her skirt up for me so I can see what's underneath it."

They were not expecting this. The two sisters share a panicked glance, but Laura moves almost instantly to comply, unable to resist. She steps behind her younger sister, reaches down to the hem of her pleated schoolgirl skirt, and pulls it up with both hands.

You pause again to enjoy the view. Above her white knee-length socks, you can now see Andrea's pale creamy thighs extending all the way up to her panties - pale pink and lace-edged. The birthday girl decided to wear a matching set today. You think about making a comment, but are distracted by tremors and whimpers coming from the sisters. What's with them?

Ah, they're naked and very close together. Older, taller Laura is standing very close behind her younger sister, so close her tits are probably almost brushing against Andrea's bare back. She probably feels Laura's hot panting breath right on her ear.

"Okay. Now turn around, Andrea. Laura, lift the skirt again. Show me the back." You want to see the 18-year-old's panty-clad ass, but what you want even more is to stoke the flames of this growing sexual tension, and the girls' reactions do not disappoint. They stand nose-to-nose, Andrea's heaving breaths just barely brushing her nipples against her older sister's chest. Their eyes are locked onto each other. It's as if they want to look away but somehow can't.

The words come out without any input from your brain. "Go ahead. Kiss." At your words the sisters seem to leap the scant inches that separate them, pressing their lips against each other with more hunger than you even imagined. Your own brain short-circuits for a moment due to how fucking hot this is, but you quickly shake yourself out of it long enough to pull your phone out and get a quick video. You get about ten seconds' or so before mom pipes in again.

"John, what is this? There's no way they can concentrate on studying like this. And I thought you said you were going to use them, not just stand there while they... distract each other." The two sisters are jolted out of their shared kiss at the sound of their mother's voice, the moment popped like a soap bubble.

"Did I tell you to stop? Laura, take Andrea's panties off, then get back to kissing." You don't wait for them to obey before you whirl around on Lisa.

"You don't get to question how I use your slutty freeuse daughters." Your voice is soft but venomous. "If I want them to act out my favorite porno while I watch, fully clothed, that's what they'll do. If I tell them to masturbate all over their precious homework, that's what they'll do." Lisa pales further and further as you continue. You pause and look Lisa up and down. You've been focused on her teen daughters, but mom definitely still looks good. She's got what looks like a toned body like Laura but wide hips like Andrea.

You were going to kick her out of the room, but now you have a better idea. "So now I'm going to punish you. You are going to watch - silently - as I defile your daughters. If you get turned on, you will touch yourself. But you will not cum unless I say so. Understand?" Lisa, lips pressed together in desperation not to disobey you, nods desperately. "Good. Now strip down to your underwear and stop interrupting."