duty — male yautja x reader x female yautja
summary: your yautja mate informs you that because the two of you cannot conceive, his duty requires him to provide pups for his species regardless. that means, mating with a female. this mating means little to your mate, only seen as a biological imperative that would not impede his love for you. you, however, struggle to accept the idea of your mate having sex with another female. the solution to this problem? you agree to join them both.
tags & content: NSFW, F/F/M, threesome, sexual content, alien/human relationships, glaringly obvious cultural differences, yautja culture, slight angst to start, vaginal fingering, clit rubbing, penis in vagina, rough sex, mildly violent sex (between yautja’s, it’s pretty tame), minor injuries, riding, dominant female yautja, breeding, masturbation, voyeurism, female reader
word count: 4.2K
“You have to do…what?”
The lump in your throat makes it hard to keep the tremble out of your voice. Kar’thuun had dropped the information like it meant nothing, and you find yourself unable to look anywhere but his face as he tilts his head towards you.
He doesn’t quite understand your sudden emotional fluctuation, but he can sense it. His hand cups your face in an attempt to soothe you, but you lazily jerk away.
His mandibles curl for a moment, before he bows his head to catch your eyes.
“What is the matter?” He rumbles.
You clutch your arms tightly, tension coiling in your spine. It’s an ugly feeling, and a part of you knows you should take a breath first. You are different species, with vastly different cultural norms. But how could you take a breath when he had just told you that he needs to take a mate?
“What’s the matter?” You repeat, your voice sharp. “You just said you have to take a mate, Kar’thuun.”
“Yes,” he responds, as if he doesn’t understand why you’re getting so worked up over it. “Shall I phrase it better? I need to return to Prime to mate.”
Your face scrunches, and you shake your head violently. “Jesus, Kar’thuun—”
“We are unable to conceive,” the hunter cut in, straightening higher now that he understood the gravity of what you were feeling. It wasn’t his intention to hurt you, never to hurt you, but the predicament meant a lot less to him than it did you. “I have a duty to produce healthy pups whether I am mated outside of my species or not.”
“And, what, you expect me to be okay with this?” You cry, levelling him with a sharp glare. Your lungs feel all twisted up in your ribs, and you exhale raggedly. “You’re mated to me. You’re my mate. You don’t mate with other people while you’re in a relationship with me.”
Kar’thuun’s mandibles twitch, and yet he meets your glare with one of his own. He doesn’t move to take your shaking shoulders, however, sensing you would just push him away anyway.
“You misunderstand the situation,” he firmly states, keeping his voice low and levelled. You hate it when he speaks to you like this, but it pierces your judgement, which is clouded by cluttered emotions. “This duty is a biological imperative. It has one purpose, and that is to produce pups.”
“It’s sex, Kar. It’s intimate. We have sex, how can you mate with a female and then come home and be fine mating with me like nothing happened?”
“She is not my mate,” he rumbles, like he doesn’t quite understand why it means so much. “We mate, fulfil our duty, and part.”
“Oh, she,” you bitterly scoff. “You’ve picked her already.”
“She picked me,” the hunter corrects. “As do all our females.”
“And doesn’t she know you have a mate already?”
“She is aware.”
Something ugly rises in your throat. Of course, such a hunter like Kar’thuun would be desired by his female counterparts. It had grounded you, made you feel confident to know that it was you he had chosen in the end. That he was your mate, and nobody else’s. You don’t know much about female Yautja’s other than what Kar’thuun had told you. A resentful part of you imagines this female did it on purpose.
Kar’thuun hesitates, before delicately testing the waters. His hand cups your shoulder this time, causing you to tense involuntarily. After a heated second, he lowers himself to one knee so he can see you better, gently turning you to face him.
You resist weakly, keeping your gaze pinned elsewhere. Your eyes have already welled with hot tears, and you know if you try to speak again, they’ll tumble down your cheeks like a leak. Stubbornness claws up your throat like hot coals.
“I should have told you,” Kar’thuun rumbles, and that’s all it takes before you barely stifle a sob, tears running down your cheeks.
“I don’t want you to do this,” you whimper, your voice shaking. He reaches up to brush the tears from your cheek, but when you flinch away, he slowly lowers his hand.
“It does not mean what you think it means,” he insisted. “It is not for love. Do humans not procreate the same as we do?”
You hiccup through your ragged breaths, a flurry of anger rising like an ash cloud. “No! We don’t!”
Kar’thuun looks genuinely perplexed at that, his mandibles twitching microscopically before he schools his expression. You’re openly sobbing now, your hands clumsily pawing the fresh tears from your damp cheeks. Nothing seems to stop them, your gut knotted so tight you wonder if you’re going to be sick.
“We make babies but we don’t screw other people when we’re in a relationship!” You snivel. Your vision is blurry, but you think it’s for the best. Kar’thuun often doesn’t express his emotions so clearly, but there’s a flicker of hurt and regret. “We stay with our one partner…”
“You are my one mate.” He pauses, his eyes drifting down in shame. “I believed it was the same for both of us.”
You can’t handle much more. With a weak shove, you detach yourself from his loose grip to remove yourself from the situation before he sees you any worse than you already are. A part of you wants to latch onto the logic; it is there. For Kar’thuun, procreation wasn’t a desire. It was a duty, and feelings weren’t necessary for an act that didn’t mean anything to him. To mate with a female for pups was something entirely different to mating with you, his mate. Your cultural differences were so vast, but this was the first time it hit you hard. It wasn’t cheating to him, but it hurt you.
You spent the next couple of days moping, alone, your heart heavy in your chest. You’ve sobbed so much that your eyes feel hot and puffy, sore from the moisture. You roll lazily onto your back, your shared chambers feeling empty without the both of you. The furs beneath you are cold, and uncomfortable.
You groan, shoving your face back into the soft material. You kick your legs with a muffled scream until you feel slightly better, and then slowly rise to your feet. How could you be okay with this? You knew you had no choice, with how important duty was to Yautja, but why didn’t it occur to Kar’thuun to tell you about this? If he did, would you have ever—?
Your bottom lip tightens inexplicably, before you release a sharp breath. You don’t want to think about that.
Your bare feet are quiet against the tiles of the ship, the lights dimmed low to accommodate for your sleep schedule. Voices drift from your left, and you instinctively pause. It’s Yautja, too fast and too sharp for you to pick up. You recognise Kar’thuun’s voice from the room, but not the other.
Ugliness curdles in your chest, and your feet move before you can stop yourself. As you peer through the door, you finally see her. She stands taller than Kar’thuun, and seemed to have noticed you even before you noticed her. You stifle the surprised gasp, your head snapping towards Kar’thuun.
“This is her?” The female Yautja speaks. Her voice is like velvet and gravel all at once, the hairs on your skin prickling. Even her presence is stiflingly scary. Your spine stiffens as she advances on you, moving like a true predator. You have to crane your head back just to meet her gaze, sharp eyes burning straight through you like acid. You feel the heat of them scaling your entire form, picking you apart with clinical precision and something akin to curiosity.
She steps around you, and before you can open your mouth to speak, her claws trail across your hair. She makes a trilling noise, and tugs hard on the locks. Your legs twist to dislodge yourself, hissing in pain. Humiliation burns your cheeks.
“Careful,” Kar’thuun warns, having straightened protectively. “Oomans are delicate.”
The female simply hums, and rakes her eyes over you again. It’s as much as an apology you think you’ll get. “Does she speak?”
You bristle. This is the female that had chosen your partner to mate with, wasn’t it? And here she was, inspecting you like you were a bug under a microscope. Was she scoping you out? Deciding how she would steal Kar’thuun from you? Jealously sparks in your lungs, your tongue like a fire whip. “Yes, I speak.”
Your heart pounds in your chest. A female Yautja is the last person you want to be talking to like that, but she simply trills, like it excites her. You crane your head towards Kar’thuun, who is watching the scene unfold with equal parts anticipation, and concern. You open your mouth to say something, but the words die off into a surprised squeal when the female curls two fingers under your chin and tugs your gaze towards her.
She tilts your head aside like she’s assessing you again, prowling behind you with a large hand dragging across your side. Your breath catches in your throat, choking on it when she firmly cups your ass.
With a jerk, you try to move away from her.
“Hey!” You squeal, twisting around. “Kar’thuun!”
The female trills, and suddenly the heat that had been in her eyes shoot right through your core. You blush, forcing your gaze to your mate instead.
“You are right,” the female hums, stretching taller. “She is cute. So fascinatingly soft. How do you not break her?”
“A lot of practice,” Kar’thuun purrs. “And patience.”
The female huffs. “You are fortunate I agreed to mating before the breeding season.”
The ugliness leers back up, but it’s fainter this time. You clutch your shirt a little tighter to your chest, because the Yautja keeps glancing at it like she is vehemently eager to see what lies underneath.
“I am Syl’neth. Learn it well,” she informs you firmly, before tilting her sharp gaze to your mate. “Tell her.”
You swallow, the lump in your throat hard. You stare at Kar’thuun intently, trying to steady the loud thudding of your heart against your ribs. He approaches you, and it’s been too many hours since he’s been so close that you almost forget how mad you were at him. You stubbornly dip your head, but he tucks a loose strand of hair behind your ear, and it makes you glimpse at him through your eyelashes.
“You have the option to join us.”
Your mouth dries.
“Join you?”
Kar’thuun trills, swiping a thumb beneath your eyes where it’s still slightly blotchy. Your eyes nervously dart back and forth from your mate to Syl’neth, her presence stiflingly suffocating. You struggle to form words for a fleeting moment, so Kar’thuun takes over.
“There is no neglecting my duty,” he informed you, the words stinging slightly. You knew this. “But Syl’neth was open minded, and suggested that you join us to ease your feelings on the matter.”
You gawk.
“What?” You swallow.
“We will mate,” Syl’neth cut in,” whether you like it or not. You may choose to join, watch, or leave.”
You bristle at her, annoyance climbing in your throat, before she simply purrs at your territorial display. You realise she’s doing it on purpose to get a rise out of you, and not in the way you imagined. Your stomach knots before you force your gaze away, shaking your head widely.
“No,” you mutter, hating yourself for considering the idea. “No, no. I was so mad at you, it would be hypocritical of me to—”
Your voice trails off when he cups your cheek, your eyes going wide. You don’t hear her move at first, but Syl’neth had slid up behind you with expert grace, and the heat that radiates against your back makes you shudder. Your lips part, only to have Kar’thuun lightly drag his thumb over the plump flesh, and Syl’neth’s warm palm to settle under your jaw. She tilts your head up, the back of your skull resting against the muscles of her tummy.
“We can smell your arousal,” Kar’thuun mutters, like he’s expertly trying to embarrass you more. Your throat bobs as you swallow, lips parting desperately around the thinning air.
“Oh, I…” You can’t breathe, jolting when Kar’thuun drags his hand up your thigh, settling there like a promise and warning all wrapped up in one. At the same time, your attention is divided by the stronger and larger hands at your front, Syl’neth’s dreadlocks spilling over your shoulders as she leans over you. Her claws easily tear through fabric, parting them, and your eyelids flutter as she cups your breasts, squeezing and kneading them experimentally.
Your breathing starts to quicken, your mind going foggy. Kar’thuun makes a noise that sounds like a deep chuckle, as he works you easily out of the bottom half of your clothes. He cradles your calves, lifting each foot off the ground, tugging down your panties until you’re completely bare.
Your spine occasionally arches whenever she brushes your pert nipples, but Syl’neth keeps you thoroughly pinned back against her, leaving you no room to squirm. Kar’thuun doesn’t seem concerned with teaching Syl’neth about the human body, simply letting the female Yautja discover and explore it all for yourself.
“Delicate little thing,” she muses, one hand splaying across the length of your stomach. Your skin jumps at the warmth of her, bleary eyes squinting up at her softly. She suddenly pinches the back of your neck, prompting Kar’thuun to rise to make way for her. You hadn’t realised how weak your legs had gone until she’s practically dragging you to the bed, and shoving you firmly onto it.
You land with a bounce and a huff, unable to even get your arms out from underneath you before her hand closes around your ankle. She drags you close to the edge, drawing a yelp from your lips as you fight to twist onto your back. Heat rises to your cheeks as she easily parts your thighs, your resistance instinctive but weak.
Her eyes take in your exposed flesh, mandibles twitching once. You take the second of reprieve to glance at Kar’thuun, your eyes wide and pleading.
He notices your expression and settles on the bed near your head, leaning down to kiss your temple with his mandibles. Your hand slips into his larger one just as Syl’neth’s fingers trace your delicate folds. You make a soft noise.
She marvels at your wetness, dragging her finger through the sensitive flesh. She quickly catches on that your clit makes you squirm the most, lathering attention to the little bundle of nerves.
“Ah!” You gasp, your hips bucking slightly from the sudden pressure. Your fingernails press into Kar’thuun’s palm, but he doesn’t feel it. Emboldened, the female shifts further over you, her form completely swallowing yours. With a careful press of her fingers, she slides two fingers inside of you.
You squeal, your toes curling.
“Delightful noises,” Syl’neth hums, mostly to herself, thrusting her fingers with little restraint. Your pussy is warm, tight, and Syl’neth almost imagines the appeal of a male cock wrapped in you. “So many nerves for such a small body.”
You whine, the force of her thrusts rocking you against the bed. Kar’thuun takes particular interest in the way your breasts bounce a little, his hand cupping one gently. His rough palm rubs against your nipple, making your thighs turn in and squeeze around her wrist.
Syl’neth notices, and a deep growl resonates her in throat.
Despite how delicious her fingers are inside of you, she pulls away all too fast. You pant, your nose scrunching, before the female levels Kar’thuun with a sharp, demanding look. There’s heat in both their gazes.
“Fuck her, then.”
You’re a little shocked when Kar’thuun obeys without question. He engulfs your waist, sliding you towards him with an impatient tug. He presses his hand between your shoulder blades and, not unkindly, but firmly, wrestles you onto your belly. You don’t have a second to catch your breath.
“Oh, god…”
With shaking hands, you manage to get your arms underneath you as your mate focuses on removing what little clothes he has on, your thighs slick with your own arousal. You even lift your hips, arch your spine, a slither of boldness striking you. You know it won’t last long — it never does. The blunt head of his cock nudges against your folds, his hand returning to your shoulder blades to pin you into the furs.
The burn of the stretch is delicious, a long whine escaping your throat. Your cunt latches onto him, swallowing him inside, and you will never get over the feeling of him fucking his cock into you for the first time.
Kar’thuun is particularly rough, too. You don’t know if it’s some sort of inate competitiveness or fight for dominance that Yautja have in each others presence, but you’re not complaining. You’ve white knuckled the furs so hard that you can’t feel your fingers anymore, his hips slamming against your ass with enough force to lodge your heart into your throat.
At some point, Syl’neth had pressed her fingers on your tongue, the digits sliding across your appendage. You can taste yourself on her, and in your daze, suck the wetness from her fingers without direction.
Saliva drips down your chin as she lets her fingers roll back and forth on your tongue, pressing down to make you open your mouth even further.
Your words are muffled, but you don’t think you would make any sense even if they weren’t there.
When she finally withdraws her fingers, you barely have enough time to breathe before Kar’thuun’s hand engulfs the back of your skull, and shoves your face deep into the furs.
The other digs hard into the curve your waist, fucking you faster now.
Above you, the two of them exchange short, angry growls. If you could hear them over the sound of your own muffled sobs, you might have thought it sounded terrifying. The playfulness of it completely alludes you.
Kar’thuun doesn’t come, but you had almost forgotten that this entire arrangement had been to produce pups. You don’t doubt a few rounds wouldn’t kill them, but you sure know it would kill you. One Yautja’s stamina was enough for you, and you didn’t dare test that theory with a female Yautja.
“I’m gonna come, I’m gonna come, I’m gonna come,” you babble dumbly, unable to form any other thoughts. Syl’neth fingers trace your flushed spine, her claws making your skin tingle.
“Already?” She purrs, glancing at Kar’thuun. He feels you tighten inexplicably around him, drawing a deep growl from his chest before he can answer. He grinds his cock in a way that has you melting into a puddle, an electric orgasm bolting through all your nerves, wringing them of all sensation. The female slowly rises to her feet, leaving your blurry view.
Kar’thuun gives a few extra pumps, purring as your release pools around his cock. Your paw at the furs for leverage, but once he slips his cock out, you fall into a pile of weak limbs immediately.
You feel Kar’thuun nudge your legs apart, his thumb pressing against your dripping hole. You whimper, twisting weakly and gently swatting his arm with your foot.
“Stop,” you moan, your chest rising and falling raggedly. You trip over words, before righting yourself. “Where is—?
You see her then, having stripped off her minimal clothes. If not for her small breasts, you might not ever be able to tell the difference between females and males of their species. She moves fast, her hand closing around Kar’thuun’s shoulder and shoving him onto his back.
He instantly tenses, forcing himself back up, but Syl’neth is much faster, and, what you come to realise, much stronger than your mate. Once she clambers onto his lap, he struggles to buck her off, each attempted blow easily blocked or grabbed by her.
For a moment, you think they’re truly fighting, but judging from the way Syl’neth lifts her hips to take his cock, you realise their mating is a lot more violent than your own.
They’re in a constant struggle, mandibles stretched with threats, growls deep and gutteral.
She sinks down onto your mates cock with ease, taking his wrists and slamming them next to his head. Kar’thuun growls angrily, struggling, but he cannot outmatch her. Syl’neth takes the most joy in this.
She rides him hard and fast, the sight sending a rush of heat straight through your legs once more. Your heart pounds as you watch them, Kar’thuun playfully trying to wrestle her onto her back, but ultimately failing, only serving to arouse them both further.
Slowly, you shift your legs, your fingers tracing your sensitive folds. You bite your lip to stifle the soft gasp on your tongue, gathering the globs of your earlier release. Your eyelashes flutter as you gently circle your clit, half lidded gaze tracking the way the Yautja’s hips roll in a relentless, firm rhythm. Conversation between them is minimal, but you feel like that’s normal for them.
You don’t get to reach another orgasm before Kar’thuun gives a sharp growl, and Syl’neth presses herself deep, stilling. She takes his whole cock as he releases, her claws having scratched his wrists hard enough to draw thin lines of neon blood.
You pause, heart hammering in your chest, pressing your legs together and abandoning your masturbation. You feel your cunt throb, but the sensation slowly fades as you watch Kar’thuun trill, satisfied he’d bred the female.
Syl’neth is the first to remove herself, and she still retains the same energy as she did before, as though they had never mated in the first place. You hesitate, before crawling over to Kar’thuun with clumsy limbs. As he sits up, the first thing he does is tentatively check on you.
“Are you alright?” He asks, his hand hovering over your face, and then the side of your chest, searching for any discomfort.
Numbly, you nod your head.
“Yes,” you stammer, your eyes wide. “Are you?”
You can’t help but ask — Kar’thuun was rough with you, but the touch of violence in their mating was unlike anything you had ever seen. He had always said Yautja foreplay was violent, often beginning as a ruthless spar. You can’t even imagine what that looks like.
Kar’thuun kisses your temple, and then nuzzles your forehead.
“Yes,” he answered, his mandibles curling into something smug. “I let her win.”
Syl’neth didn’t let that slide. “We both went easy on each other. Believe me, you would have come away with much worse injuries had your mate not been present.”
You stare at the raw scratches on his wrists, the skin discolouring with light bruises already. You swallow, a blush rising to your cheeks.
“Are you leaving?” You glance at Syl’neth, your eyes raking over her form. She scooped her dreadlocks, clipping them behind her with effortless ease; her muscles strained under the dim lights. She spares the two of you a restless glance.
“My duty is done here, is it not?” She asks, but you know the question is rhetorical. You wince as Kar’thuun gently drags you closer by your waist, his mandibles making quick work of the sensitive flesh at your neck. Your breathing startles, your hands sliding up his arms and grasping his shoulders.
You bite your lip, the words rushing from you before you can stop yourself.
“But we’re not finished,” you start, sensing the way Kar’thuun goes still. You feel her level you with a firm glance. “I mean, you could still…”
Syl’neth continues to regard you with a stern look. The silence is so loud, you’re sure they can both hear how hard your heart is pounding in your chest. You should be pleased this was all over, that what you were so upset about was over and done with.
You’re being hypocritical. Right?
With something that sounds like a chuckle, Kar’thuun continues to stroke your waist as the female turns to face him fully. From the look in her eyes, you know you’re in for a long night.
“Spread her legs.”
