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ivystoryweaver · 6 months

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Perfect Fit

A Choose-Your-Own-Adventure Story in 2 parts

My Masterlist

Idk, babes The muse has spoken...

Pairing: Nathan Bateman from Ex Machina x f!reader

Word Count: 4.2k

Summary: You are Nathan's employee and are staying at his secluded home for experimental android purposes. Shenanigans ensue. Like - two Nathans shenanigans.

Content: MDNI, NSFW, you are responsible for your reading. (more below the cut) NATHAN BATEMAN SHOULD BE WARNING ENOUGH

Content/Warnings: sci-fi semi-horror elements, smut - pwp, oral-m and f rec., p in v, unprotected sex, voyeurism, dacryphilia, degradation AND praise, anal sex, group sex, creampie, multiple orgasms, overstimulation, dub con related to possible gaslighting, sex with AI/androids, language, Nathan is his own warning - he's a narcissist duh, sci-fi nonsense, not beta'd, I'm a Nathan-writing virgin so enter at your own risk

I guess that's all?

✧ ---------- ✧ ---------- ✧ ---------- ✧

"I have a surprise for you."

Nathan - your boss and temporary roommate, in the loosest sense of the term - breathes on your ear.

"Shit - Nathan!" You gasp, nearly slicing your thumb off with vegetable knife you're using. "You scared the shit out of me."

Whirling around, you find his nose crinkled in mischievous (evil) laughter.

So you smack him with the flat side of the knife's blade.

"Fuck, sweetheart, calm down," he admonishes, trapping your wrist in his strong grip. 'You'll like it, I promise." Thick, dark eyebrows shoot up over wire-rimmed frames. Okay, this asshole is pleased with himself. What else is new?

Maybe you should lighten up about the little jump scares he likes to do. After all, it's the only time you get a laugh out of this narcissistic genius.

Nodding your head toward the countertop full of chopped veggies, you protest. "I'm making soup."

"Come on," he decides for you, pulling the knife from your grip and laying it on the counter. Wrapping his fingers around yours, he drags you out of the kitchen.

So bossy. But hand holding is the sweetest it gets with this man.

So you follow.

In your weeks living with/working with Nathan, you've discovered two things:

Arguing with him is pointless.

His dick is big enough to match the size of his ego.

You promised yourself you would NOT engage in any physical relationship with your reclusive, genius, billionaire boss. Yeah, that lasted about three days before you climbed on top of him.

Since then, business and pleasure mix on the daily. So, wherever he is almost sweetly leading you by the hand - well, it could be work-related, but it's likely...recreational.

Wrong. It's both.

"Here we are," he announces, guiding you into one of his indoor pool areas. This particular pool resembles a lush, tropical paradise. An actual stories-high waterfall cascades down into an artificially warmed pool. White bubbles float all over the surface, foaming at the waterfall's base, and giving off a bubble bath vibe. Greenery surrounds you, along with bright, tropical flowers.

"I remember this pool. You showed it to me on the first day."

Nathan makes a face. He isn't a fan of you (or anyone) stating the obvious.

Still, something has him in a good mood. Like a better than we're-about-to-fuck-in-this-pool good mood.

"Get in," he nods, pulling off his glasses before peeling his soft white shirt over his head.

Soon enough, your slick, naked bodies bob in the water as Nathan lifts your thighs around his waist and licks his way inside your mouth.

His thick beard tickles your face, the tingling sensation a dizzying contrast to the soft caress of his lips as his tongue rolls over yours.

Suspicious that he could be this excited about a quick romp in the water, you decide to enjoy yourself. After all, just him yanking his shirt over his head created a personal waterfall between your legs.

After a salacious make-out, you let out a yelp as he pulls you by the hands through the rushing waterfall.

Cool water dumps over your head, making you squeal at the contrast to the pool's warmth. Once you emerge behind the waterfall, you see it: the cause of Nathan's...chipper mood.

Lying naked and stretched out like a Renaissance work of art, on a large, flat rock, is...Nathan.

Well, not Nathan.

Your Nathan (is he really yours?) smirks, folding his arms over his bare chest with a look of self-satisfaction like you've never seen.

The other Nathan perks up at the sight of you. His eyes instantly fall to your chest, and he wets his lips at the sight of your bare breasts - nipples pebbled from the cool waterfall.

Pushing himself into a sitting position, you notice him...getting hard.

Your Nathan is practically salivating.

"What the hell is this?" You question warily, finding it difficult to tear your eyes away from this Nathan-shaped Other with a Nathan-shaped cock.

"He likes you," Nathan nods toward The Other's erection as if it is scientific proof.

Other Nathan pushes off the rock, his muscles flexing deliciously, into the pool's warmth, half-swimming, half-walking toward you, with...intention.

You instinctively countermove to Your Nathan's side. "What is going on? What does he want?"

"What do you think he wants, sweetheart?" he murmurs lowly against your neck. A shiver zips down your body, straight between your legs.

"He...it's...he's like..."

"Fucking hate it when you stutter," Nathan groans. "You know what he is. You know what's about to happen." Boldly reaching for you, he cups your cunt, swiping his fingertips through your slick folds, his teeth teasing your earlobe. "You want it to happen."

"Nathan, I ..." You gasp out as he rams two fingers inside you, pushing the pad of his thumb roughly over your clit.

The warm water heightens every sensation.

"You'll like him," Nathan assures you, roughly plunging his digits in and out of you as The Other stands directly in front of you. Dark, hungry eyes meet yours before traveling down the curves of your body to watch the Creator finger you.

The Other wets his lips again, reaching to wrap his fist around his cock.

"Oh fuck," you gasp, grinding your hips down on Your Nathan's hand as The Other strokes himself vigorously.

As infuriating as it is to admit, Your Nathan is right. This is doing it for you.

"Look at you, already moaning for us like a whore." As Nathan speaks, his teeth nip at the flesh behind your ear.

Then, without warning, he jerks his fingers out of you, causing you to cry out in frustration and surprise, your body stumbling forward into The Other Nathan...

...who grips your arms, steadying you, his straining erection prodding your abdomen.

"Give me a turn. I won't stop," The Other speaks in exactly Nathan's voice. The sound of it - the feel of his heavy cock against your skin mildly terrifies you - yet you find yourself responding eagerly as he surges forward to kiss you.

You feel Your Nathan's hand on your shoulder, jerking you back. "No fucking kissing." He glares at The Other warningly.

Your head whips around to your boss/fling, your eyes going wide at his one and only, ever display of possession over you.

"Nathan, what - "

"Come here," he interrupts, guiding you to the rock where you found The Other lying a few minutes ago. Your Nathan pulls you back against his broad, muscular chest, running his hands all over you, as if claiming you. The two of you lean against the rock, your bottom halves submerged in the warm, frothy pool.

His hands cup your breasts, kneading the soft flesh as his thumbs rub circles over your nipples. You keen and arch into his touch.

"Eat her out," he commands The Other...who nods once in response and stalks toward you determinedly.

"Wait, Nathan, how can - we're underwater - " Before you can finish your question, The Other eases below the pool's surface, nearly disappearing beneath the bubbles.

A second of silence follows and then you feel his mouth on your cunt.

"He can breathe underwater," Your Nathan almost purrs on your ear, working your breasts seductively while grinding his own erection between your ass cheeks.

"Mmmnnn...fuck," you moan as The Other's lips latch onto your clit, sucking underfuckingwater. His thick beard is always driving you wild and his lookalike is no different.

"You want him to stop, just say the word," Nathan offered. "But I told you - you'll like it."

Your hips involuntarily buck against The Other's mouth, which pulls growl of satisfaction from Your Nathan.

"Use him, babydoll, he can take it," he instructs, thrusting harder against you. "He's your toy. My gift to you. Play with him."

You could swear The Other Nathan smiles against your pussy before plunging his tongue inside you.

"Oh shit...oh my god..." your incoherent moaning makes Your Nathan chuckle in satisfaction. "What a good slut for us. Knew you would spread your legs so fast. Gonna fuck you until our cum is dripping out of every hole you've got, honey."

Nathan reaches for your thighs which he helps you hoist over The Other's shoulders. Taking your hand, Nathan guides you to grip the back of its neck.

"Fuck him, honey. Take what you want. Then I'll slip into that tight ass until you cry for me."

That nearly sends you right over the edge. Your hips buck wildly, sloshing water everywhere as you fuck yourself on The Other's tongue, hands pushing his shaved head against your aching center, yanking him against you with your legs - heels digging into the flesh of his back.

Nathan isn't kidding around. As soon as you start writhing, he pushes your cheeks apart and eases the tip of his cock into your tight hole.

Thankfully, you've done this before, many times, but the sting is still there - the stretch of it - as Nathan works his thick cock into you slowly.

You still your rocking, which seems to infuriate The Other, still underwater. He jerks at your hips to pull you forward, but Nathan is still pushing into your ass.

A slight tug-of-war ensues - but the water soothes and slows things down just enough so that- moments later, you have one Nathan in your ass, breathing on your neck, whispering filthy things in your ear, hands wrapped around your tits. And The Other Nathan underwater, slurping and licking and sucking - worshipping your cunt.

Your body arches violently as you come, your moans embarrassingly loud.

"That's it, honey, squeeze my cock so tight," Nathan grunts right on your ear.

You're still coming down from your high as The Other emerges from the water, eyeing you hungrily. Your Nathan is still inside you, pumping slowly.

"Look at his cock," Nathan instructs. "Do you know how much work it took to replicate this dick for you? Do you see what I made for you?"

"Y-yes," you stammer, admiring the creation before you, still heady and euphoric.

"Good. He's gonna fuck you now, babydoll. We both are. That alright?"

The thought of two huge dicks inside of you sends a bolt of nervous anticipation through you, but Nathan is filling you so good. You don't want to stop.

"Use him," Nathan repeats his command, even as The Other reaches for the swell of your hips. Staring into your eyes, he bends his knees slightly, reaching for his stiff length and sliding the tip through your folds.

Without any more fanfare, he pushes deep inside you and you scream at the intrusion. It's too fucking much - two of Nathan. Two cocks so thick - so fucking heavy, thrusting inside you, using you like a doll.

They set a rhythm, back and forth, over and over, a little faster with each thrust, hands roaming, fondling, caressing your wet skin. The press of two sculpted bodies caging you in already has you close again. Your next orgasm hits you like lightning, your body seizing in mind-altering pleasure as the two men inside you push and plunge harder and faster.

Your Nathan comes with a strangled cry, filling your tight hole with his spend, fascinated by the sight of another him fucking you so good.

Nathan is Nathan's favorite person, so watching himself rail you is the ultimate high. And this surpasses the many other times he's watched himself fuck his androids played back on a screen.

Easing out of your tight hole, he takes a step back in the water, admiring his handiwork.

He's a goddamn genius.

With Your Nathan no longer behind you, The Other pauses just long enough to lay you down on the rock and hoist your legs up around his waist. He leans over you, palms flat on the rock - one arm on either side of your head - and smiles down at you wolfishly.

He winks. "Let's give him a show. Let him see I'm your perfect fit."

Your eyes dart over to Your Nathan for some sort of sign of disapproval, but The Other grips your jaw. "Look at me."

If Nathan hears The Other, he ignores it, seeming content to have come in your ass, and now, to watch a version of himself lay you down and pound his seed into your cunt.

You go a little hazy as your eyes once again find Your Nathan's, holding his gaze while his creation snaps his hips hard and fucks into you faster than Nathan has ever managed.

Nathan is onto something here, because the fact that he is watching pulls moans as loud as the waterfall from your throat. Your body twists and arches violently, giving him quite the display.

"What a good whore," The Other mocks, "fucking yourself on a toy. Because that's all I am, right?" He glares at his maker and comes during this act of defiance.

You're too fucked out to keep up with the conversation at the moment, but Your Nathan darkly chuckles. "Shit," he whistles. "I'm so fucking brilliant, I even gave you my ego."

Then he turns to you. "You alright babydoll?"

You let out a breathless laugh, attempting, but failing to drag yourself up off the rock. Apparently, they are done with you for now

"Pick her up," Nathan instructs The Other, turning to climb out of the pool.

Wait, is he just leaving you to the machine? Asshole.

The Other Nathan complies, offering his hand to help you up. You take it, easing off the rock and back into the water, stumbling into his chest.

"You okay?" It asks you in a hushed whisper, grasping your elbows to steady you.

You assure him you are fine. Taking your hand, The Other leads you back the way you came, through the waterfall, but just before you dunk your heads under the cool rushing water, he pulls you into his arms and stares deeply into your eyes. Then brushes his mouth over yours.

Your Nathan has already passed through the waterfall and left the room for all you know. Still, he'll see this. He always sees everything. It’s a condition of you living here.

Feeling a slight resistance from you, The Other Nathan releases you. "You like kissing," he states, as if discussing data and not pleasure.

"What?" You question, your chest heaving with desire and confusion.

"Don't make me repeat myself." One dark eyebrow shoots up condescendingly. How very Nathan. "He doesn't kiss you as much as you want. I know - all the footage is stored in my memory." He taps one finger to his forehead with that know-it-all Nathan smirk. "He doesn't kiss you enough, but I will. I'll kiss you anytime. Will you kiss me back?"

You're stupefied.

It takes you a moment, but then you remember. Nathan said The Other was for you. Nathan said 'use him.'

Why the hell not?

"I'll kiss you back," you shrug, barely finishing your sentence before The Other pulls you against his chest, melding his lips with yours. He samples each lip before licking his way inside, his hands already sliding down over the swell of your ass to hook under your thighs.

Before you can even think, he pushes his cock inside you again, which is unrealistically hard already, his knees bending just a little as the two of you ease further down into the warm water.

Wrapping your arms around his neck, you decide to enjoy this present from Nathan - this Nathan shaped fuck machine. Feels kind of wrong, but fucking hell does his cock feel real plunging in and out of your cunt underwater.

"He told me I would like being alive," The Other whispers, running his hands up the curve of your back to grip your shoulders and pull you down harder into his vigorous thrusts.

"He was right. I do," he rambles on, fucking up into you faster now.

The familiar heat pools in your belly as he fills you so good. So like Nathan. Only...sweeter? Or are they the same?

What the fuck is wrong with you?

"This is what I was made for," he pants against your lips, the rhythm between you making literal waves in the pool. He kisses you again and your back arches in bliss, your cunt squeezing him until he fills you up again.

✧ ---------- ✧ ---------- ✧ ---------- ✧

Nathan watches on the monitor as his doppelgänger kisses you and brings you to orgasm number three beneath the waterfall. The sound of your moans lets him know how thoroughly he's succeeded. And The Other isn't wrong. You like to be kissed.

Nathan types out some notes before heading to the kitchen to finish dinner.

"Have fun?" He asks you once you find him in the kitchen. You took a shower (alone) before finding your boss.

Best to be honest with Nathan - he knows everything anyway.

"He's amazing," you answer simply. "Unbelievable, really."

Nathan smirks, setting down the knife he found you with earlier. Without another word, he pulls you close and kisses you breathless.

✧ ---------- ✧ ---------- ✧ ---------- ✧

Life with two Nathans is something else.

The next several days of work are centered around this new android.

That's where you find yourself now - in your bedroom with your shiny new toy. And Nathan.

"Sit down," Your Nathan tells The Other, nodding toward the bed. the three of you are naked, as usual, but the boys seem to be in a bit of a mood today.

They're both hard and ready to fuck you too.

"On your knees, babydoll," Nathan beckons you. You comply, dropping down in front of him, knowing exactly what he wants.

Dark eyes lock onto yours, and for a moment, you feel like his priority instead of his damn other self.

Your tongue darts out to wet your lips as Nathan grips your chin. "Such a pretty mouth," he murmurs, squeezing your cheeks together which forces your lips open.

He pushes the tip of his cock inside, shuddering at the absolute heaven that is your velvety mouth. You swirl your tongue along the slit, tasting him before tracing the ridge. Wrapping your lips around him, you hum against his skin, sucking on his tip, giving him a tease before he pushes his way to the back of your throat.

You gag for a moment, tears stinging the corners of your eyes. Breathing through your nose, you swallow the tip of him, laving your tongue along the underside of his shaft.

"So good, honey, just like that."

The Other Nathan grunts out a disapproving sound. Unlike your Nathan, he doesn't seem to be enjoying your mouth stuffed full of his Creator.

Which makes Your Nathan enjoy this even more. He grips your head, thrusting into your mouth like you're a toy. You gag as a drool dribbles from the corners of your mouth. You normally love being used by him, but he's not enjoying you for you at this point. And it's not even about getting his dick wet.

You tap his thigh forcefully, letting him know you need a breather. Normally you like to take what he gives, but is the goal to make an android feel jealousy? You’re distracted by the confusion and you want to enjoy this too.

"What? What is it?" Nathan pulls out of your mouth, his eyes darkening in concern. "You okay?"

Just when you think that maybe you mean nothing to him, he pulls this. He always does. 'You okay?' Those two words and his beautiful brown eyes are your weaknesses.

✧ ---------- ✧ ---------- ✧ ---------- ✧

You awaken in the night to feel lips hot and wet on your neck and his thick, hard cock pressed against your ass. Someone's hungry. The question is: who?

You've been having so much sex, you can hardly keep track anymore. Truthfully, you start to wonder if you are the personal fuck toy. You spend your days naked and cockdrunk, their spend leaking out of your holes, rug burns on your knees and a sore jaw, and so many back-to-back orgasms, you start to wonder if this some twisted version of heaven.

"Nathan..." you murmur, almost instinctually pushing back against him, grinding into his erection. "'m sleepy."

"I know, honey," he purrs on your ear, sliding one hand across your abdomen as you lay side-by-side. "All you have to do is lie there."

You groan. "Are you Nate or Nathan?"

Nate is the name of The Other. Your Nathan didn't want him to have a different name - ego wouldn’t allow it - but 'Other Nathan' got old fast.

"Wouldn't you like to know?" He teases, pushing his fingertips down between your legs.

Okay, that felt good, but you asked a question.

"Fuck off," you whined, shrugging him off with your shoulder. "Don't touch me unless you tell me who you are."

But he grips you tighter. Right then, red emergency beams dimly light the room, indicating a power outage.

"Listen fast," he urgently whispers on your ear, his hand reaching to cover your mouth. "You can't trust him. You have no idea what he's done. What he's going to do. He can't hear us while the power's out. Tell me you understand."

"Mmmphh!" You struggle to speak, writhing to get away from whoever this is.

"Be still!" He hisses. You feel his biceps flex against your arms as he squeezes you, halting your movement. "We don't have time. You can't trust him. Do you- "

Suddenly, the red emergency lights switch off and power is restored. You had been sleeping, so the room is still mostly dark, but whoever was speaking to you says nothing more. He simply climbs out of bed and stalks out of the room, completely naked.

✧ ---------- ✧ ---------- ✧ ---------- ✧

From there, things only get stranger. You begin to wonder if this whole Nate experiment is Nathan's attempt to gaslight you into...well, you're not sure what.

What could he possibly hope to accomplish by confusing you?

The answer should be pretty obvious: Nathan likes playing God.

Or is it Nate messing with your mind?

If the object of this experiment is: can Nathan's AI truly pass as a human being? Then he has probably succeeded.

You're between them now, lying on your side, in bed, one of them in each of your tight holes, thrusting in tandem, back and forth. The stretch of two heavy cocks filling you up has you whimpering and biting one of their shoulders, while the other one sucks bruises into your neck.

The sweaty press of skin against skin - your slick arousal creaming his cock, while the other one stretches your tight hole so good you cry for them, just like Your Nathan promised you would.

"Such a good girl, taking both our cocks, crying so pretty for us," the one facing you says, swiping the puddle of tears spilling down your cheeks. His other hand slips between the press of your bodies to strum at your oversensitive clit.

You sob, completely wrung out, but desperate for another release. As his fingertips trace a lazy pattern where you crave it most, your sob devolves into a low moan.

"Nothing but a desperate whore," the one behind you jeers, nipping a little too hard at your ear. "Too cockdrunk to tell who's stretching out your tight hole right now. Gonna fill you up, honey. And when I'm done, I'll fuck my cum right back into you."

The guttural moan that rips out of your lungs surprises even you as your back arches, your body seizing in yet another earth-shattering climax.

They're not done with you. Not yet.

You're too full - too fucked out to figure out who comes first. All you know is that an eternity passes, you've come so many times that your every nerve ending is on fire, only in the best way. And cum is dripping from both your holes.

One of them stalks out of the room, glasses on, cock soft and totally nude.

The other gathers you into his strong arms and carries you to the bathroom. He wraps you in a plush robe while running you a warm bath in the garden tub.

"I'll give you some space," Nathan declares, stripping you out of the robe once the tub is filled with lavender scented water and luxurious bubbles. He takes your hand and helps you step into the tub. "That was a workout," he winks. "You hungry?"

You stare at him, dumbfounded. Your Nathan? You felt so certain he stalked out of the room and Nate carried you to the tub.

"Nathan?" You whisper, your voice cracking - hoarse after crying and moaning so loudly and for so long.

"That's my name," he groans, truly hating obvious questions. "Nate's gotta charge up. You wore him out."

He is too damn pleased with himself to be Nate. Right?

You sink down into the bubbles, feeling a little better somehow.

The he asks the question.

"You okay, honey?" And those gorgeous brown eyes find yours.

✧ ---------- ✧ ---------- ✧ ---------- ✧

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