Chapter Text
By unspoken agreement, for the first time in weeks they don’t have sex first thing the next morning.
Xichen wakes up and finds Wangji still sleeping — worn out from their busy night using an impressive amount of their new stash condoms, he’s sure — and though he takes a moment to stroke her hair back from her face and kiss her slack lips gently enough not to wake her, he doesn’t let himself go any further than that. He lays there with his arm slung over his sister’s waist on top of the sheets as he waits for her to wake, and when she does he smiles at her softly just to see her sleepy expression melt a little bit further with a faint blush and a tiny hint of a smile tucked into the corner of her mouth.
“Good morning, meimei,” he hums softly and leans in to nuzzle the tips of their noses together, gentle and sweet (in a way they definitely hadn’t been together last night).
“Ge.”
Xichen tips his chin enough to just brush their mouths together in a passing caress that barely qualifies as a kiss, and then he’s hugging her close with a little hum in the back of his throat, holding her as she stretches and arches her back, pressing into him firmly before she relaxes into his grip.
“Do you want to go do your yoga while I make breakfast?” he asks between kisses to her hair, still a mess from the few rounds he’d spent tangling his hands in it to hold her up while he’d fucked her hard and deep from behind, though of course this time he wasn’t in her ass.
“Mn.”
They spend another few lazy minutes laying in bed taking their time to wake up, but eventually they roll out of bed together to go through their morning routines in companionable silence. Wangji takes the bathroom first, putting herself in some kind of order for the day before she heads out with her neatly rolled yoga mat under her arm to set up on the back porch, as she always does. Xichen watches her stretching and contorting into perfect poses through the screen door in between watching what he’s doing to prepare their breakfast, and when he calls for Wangji she comes in limber and smelling like the fresh morning air to brush a kiss to his lips in silent thanks.
They eat together, as always. Wangji washes their few dishes and puts the kitchen back to rights while Xichen heads out for a quick dip in their little swimming pond.
This late in the summer the water’s a bit warmer than when they’d first arrived, though not by much considering it’s still mountain run-off, cool and clear. Xichen’s gotten used to it, the chill of it against his skin soothing more than anything, even aside from the fact that it’s usually a welcome relief from the constant chub he can’t help but sport in his sister’s presence. This morning he takes his time, ducking under the water and basking in the flow of it like silk against his naked body, luxuriating in the freedom to be himself so comfortably with only his beloved meimei for a potential audience.
He paddles around on his back for a little while, watching the sky and the birds that flit across it, hunting the bugs that hum lazily through the air or dancing around each other in little aerial acrobatics displays that he wonders after the purpose of, since it seems a little late in the year for mating.
He isn’t entirely sure how long he’s been floating there before he hears a quiet plunk of displaced water and he turns his head without lifting it to find Wangji has joined him, sitting on one of the wide, flat, smooth-edged rocks at the edge of the pond with just her feet dunked into the water up to the graceful swell of her calves. Xichen blinks, for a moment unsure what it is that’s different about her that’s snagged his attention, but it only takes a second for him to catch up.
Xichen says nothing as he slowly brings his feet back underneath him and stands in the center of the pond facing Wangji, who says nothing, does nothing but watch him approach, water swirling around his waist in gentle eddies, near-silent splashing as he takes careful steps and skims his fingers lightly along the surface of the water.
“A-Zhan,” he greets, soft and reverent when he reaches her, hands resting on the familiar curves of her bare knees. Wangji smiles at him, just as barely-there as the softening of her mouth this morning in bed, and she spreads her legs slowly, obligingly, as always in tune with whatever he wants even before he applies gentle pressure to try to coax her into opening up. She unfolds easily, still loose from her morning stretches, almost indolent in the way her hips flex as she spreads her thighs far to either side to let him get an unobstructed view of her cunt.
Completely unobstructed.
Wangji shivers ever so slightly as he drags water-cooled fingertips gently, gently up the insides of her thighs, her skin warm and silky under his touch. He knows he should probably look her in the eyes as he does this, but he’s been aching to see her for longer than they’ve been intimate together, so how can he possibly be expected to look anywhere now but between her parted legs?
“Gege,” she murmurs and leans back onto her hands to watch him from beneath her lashes, her chest (also wonderfully, stunningly bare) on full display and pressed up a little towards him with the arch of her back in silent invitation. “I want you to fill me up. Please.”
Xichen sucks in a deep, trembling breath and slides two fingers between her lips, spreads them slowly to watch her body open for him as easily as always. Wangji watches him in silence, no further need for pleading; he knows what she wants, and it’s finally something that he’ll be able to give her without worrying about the consequences.
“Fuck, look at you,” he sighs as he sinks into her down to the last knuckles and he watches the shiver travel up her entire body as he starts rubbing her g-spot with firm crooks of his middle two fingers. “You’re even more beautiful than I expected, meimei. I didn’t think that could be possible.”
Wangji groans, tight in the back of her throat, and lets her head fall back to bare her long, kiss-bruised neck as she starts rocking her hips slightly in time with his jerking fingers. Xichen watches her in reverent awe for a few long moments, committing the sight of his sister wearing nothing but dappled sunlight to memory, before he ducks his head to kiss her body. Nipples, breasts, sternum, belly, hips, and then, his ultimate goal, her swollen cunt all get teasing licks and soft presses of his lips, and by the time he latches onto her clit to start suckling she’s trembling faintly and moaning in the back of her throat every few breaths.
His face is cool from the water, his back warm from the sun, and he presses his mouth tightly against his sister’s hot, soft pussy to eat her out with the reverent enthusiasm he reserves just for her. Wangji whimpers and slides a hand into his hair to pull him closer, practically smashing his nose and lips into her own cunt as she humps his face like she had that very first morning of their relationship (and many times since), anxious rocks of her hips that he guides easily with thrusts of his chin and the eagerness of his hungry mouth. She drips pre-come liberally all over his palm still pressed up tight against her, two fingers buried inside her cunt to keep jerking too hard, too fast at the right spot to make her cry out in time with the rhythm he sets.
Wangji goes tense all over until her feet pop up out of the water so she can throw her legs over his shoulders, dripping beads of cold crystal water down his naked back as she whimpers, tight in the back of her throat, and comes.
Xichen shivers to feel it properly for the first time, the familiar clench of her cunt around his fingers now accompanied by her come wet and hot against his skin, no barriers and no delay between the crest of her pleasure and Xichen’s sloppy appreciation of it with tongue and lips and thrusting fingers coaxing every last drop from her that he can manage.
Wangji flops down, boneless, with just enough consideration to rest her arm under her head to avoid the discomfort of putting her head down directly on the water-smoothed stone she’s laying on.
“Gege,” she murmurs and it’s choked with either tears or the after-effects of her pleasure, it’s difficult to tell. Xichen strokes her thigh with the hand not occupied with rubbing firm, slow figure 8’s to massage as much of her pussy as he can and she whines softly, piteous and horny. He’ll have to record her before he returns to university, he thinks, so that he’ll have something to listen to that he knows will work every time when he needs to get off in a hurry.
“Meimei,” he replies against her slick folds, mouth buried in her lips and the tip of his tongue diving in around his fingers every so often to lap up more of her; he was already obsessed with the way she tastes, having gotten some small hints of it through her clothes or off his own fingers whenever he can finally bear to pull them back out of her, but those hadn’t come close to this , and he’s loathe to give it up.
Still. There’s one thing he could easily imagine giving it up for.
“Gege I need your cock in me.”
Bare.
She doesn’t say it out loud, but there are so many things that they say to each other without truly saying them, this is only the latest. She’d brought it up yesterday, trusting him to do what they both want with that information when the time is right. They hadn’t fucked this morning, saving themselves for this inevitability, this final breaking down of every single barrier between them now that Wangji is ready. Not that she’d ever needed to be ready, Xichen would happily have his sister in whatever way is good for her for as long as their intimacy lasts, but he can’t deny that he’s been aching to have her naked and clenched around his cock with nothing between them for long enough to be mildly embarrassed about it.
“Of course, A-Zhan,” he replies, because what else would he ever dream of saying? He hauls himself up out of the little spring-fed pool with the strength of his arms and lays himself, dripping and water-chilled, against his sister’s warm, soft body, pressing down into her curves and thrilling in the way she immediately wraps arms and legs around him to drag him into a hungry kiss. Xichen parts his lips to let Wangji lick her own taste out of his mouth and he ruts against her lazily until biology can overcome the effects of the cold mountain water, and when Wangji nibbles on his bottom lip he gives her a little rub of his stiffening cock against her swollen clit that makes her gasp and whimper.
“Gege now,” she pleads, hazy. “Please, Huan-gege.”
“We have to move somewhere more comfortable,” he regrets to inform her as his knees begin protesting the hard, unyielding stone beneath them. He ducks down to suck and kiss Wangji’s nipples in consolation (as well as distraction), and only once she’s shivering with a fresh spurt of pre-come wetting her cunt and the tip of his cock does he pull away reluctantly to get to his feet and drag her up with him.
He doesn’t even bother taking the time to go inside. Wangji presses her naked body against him and mouths at his neck as he tries to guide her unusually clumsy steps, and so when they reach the porch he simply lays her down again on her thin foam yoga mat and gets his hands under her knees to lift and spread her legs where he wants them.
He pauses there, kneeling between her lifted legs, to stare once again at her cunt. Soft and wet from one orgasm already, the temptation of burying his face in it again is almost too strong to ignore.
Almost.
Wangji arches her back, squeezes her inner walls so he can watch a thick glob of clear, shining slick wet her even further, and Xichen is only a man deeply in love with her, so how is he meant to resist what she’s so clearly offering?
Xichen leans forward to coax Wangji’s knees onto his shoulders again, and as he leans down to kiss her slack mouth, tender and adoring, he slides home inside her body in one smooth roll of his hips that has them both groaning around each other’s tongues.
Soft, tight, wet heat envelops him, intoxicating in its immediacy, somehow feeling fundamentally different from the times he’s taken her ass bare. Her breasts press against his chest as she arches and gasps, her entire body clenches around him to try to pull him in deeper, her teeth catch and scrape at his lip and Xichen groans low in his throat for the way his sister knows how to play his body like her childhood violin.
“ Fuck meimei,” Xichen groans long and low as he starts rocking his hips immediately just to feel her clench down around him. Her nails bite into his waist, her knees squeeze around his shoulders, and Xichen grunts with each thrust as he bullies his way into the tight crush of her cunt and makes her cry out sharply in his ear each time he manages to bottom out.
Xichen wonders dimly if he should be gentler with his sister this first time they’re together with nothing else at all between them. Her body is jerking under his and her cries are a heady mix of pain and pleasure, bouncing in time with the harsh thrusting of his cock as she writhes. Xichen pounds his sister ruthlessly and watches, awestruck, as she loses herself in the raw animal need of it with reckless abandon.
On second thought, of course, he knows it could have never been anything but this between them for this ‘first’ time — desperate hunger that leaves them clawing and biting at each other just to be even closer as the clearing echoes with the symphony of their eager fucking. Wangji is a wild, beautiful thing only barely tamed by their old family rules, and Xichen wants her with a ferocity that frightens him.
“My tits, gege,” Wangji gasps eventually, still bouncing on his cock as Xichen rails her into the yoga mat without slowing, despite the way his thighs are burning from the strain. Xichen doesn’t have enough breath to ask what she wants him to do so he simply takes an educated guess and curls over enough to suck the peak of one into his mouth to latch and begin suckling as he usually does when they play at ‘nursing’.
“ Fuck , that’s it,” Wangji groans, her head thrown back and neck straining. “Gege always nurses so well.”
Xichen moans around Wangji’s puffy nipple and fucks her a little faster, chasing the orgasm beginning to tighten in his balls and the pit of his stomach.
“Fill me up, gege,” Wangji whimpers. “Stuff me full, knock me up gege please !”
Wangji tightens around him, a constricting squeeze of her walls as he pulls out and shoves his way back in, and Xichen is helpless to do anything but what she’s asked. Xichen comes in his sister’s pussy and sucks on her breast between ragged moans as his orgasm races through him, an inferno burning him alive with pleasure so intense it’s almost pain. Wangji sobs above his head and clenches down even harder for just a moment before she suddenly loosens up again as her cunt relaxes and Xichen pants through his aftershocks as Wangji comes, squirting hot, wet ejaculate all over his hips and thighs as she rocks her hips anxiously and chokes on strained moans.
Xichen kisses clumsily across her chest to suck her other nipple between his lips to nurse on as Wangji begins to recover, panting heavily and whimpering every few breaths. Her legs slide off his shoulders and Xichen carefully guides them down onto the yoga mat and her arms quickly follow suit, draped lazily over her head as her breathing slows. Xichen reluctantly pulls off her breast to better appreciate the way she’s putting herself on display, his hands cupping and stroking her hips as she watches him with a hooded gaze.
He can’t stay away from her for long — Xichen can’t resist leaning down to kiss her, starting with her slack lips before he ducks down to press his mouth to her neck, her shoulder, her collarbone, her nipple, her sternum. He lingers there, inhaling the warm earthiness of her skin, tasting the drying sweat between her breasts with quick laps of the tip of his tongue.
“Huan-gege,” Wangji murmurs eventually, carding her fingertips through his hair to push it away from his forehead.
“Mn?”
“You’re hard again.”
He is, his cock once again stiff and thick in his sister’s sloppy cunt.
“Mhm.”
Wangji coaxes him up from her chest to draw him into a gentle, melting sort of kiss, slow and hot. Her lips stick to his when she doesn’t pull away at all to whisper, “Make love to me.”
Xichen is here to serve. He tangles his hands in Wangji’s hair, weight resting on his elbows and knees, as he pulls back enough to look his beloved sister in the eyes and starts to rock his hips against hers with wet squelches.
Wangji raises her legs, knees digging into his waist, and she slings her arms around his neck to curl her fingers in his hair so she can tug it at random as their bodies roll together perfectly in sync.
“Look at me, a-Zhan,” Xichen cautions when Wangji’s eyes begin to drift shut with her pleasure. “Eyes on me — good, babygirl. That’s it.” Wangji bites her lip hard enough that the soft cherry-red flesh turns white and Xichen tuts at her carelessness. He doesn’t take his eyes off hers as he leans in all the way again to suck and nibble on her lip until she releases it with a soft gasp, a groan, the delicious arching of her back and a squeeze of her walls to coax him into a new angle deep inside her body.
It’s overwhelming like this, their gazes locked as he fucks his come into her pulsing cunt, her soft breasts bouncing against his chest with each movement. Her nipples are still hard and wet from his mouth, spit smearing between their chests to join the thin sheen of sweat. Wangji is beautiful, his sweet meimei so soft and open, unreserved and unself-conscious in the heat of the moment.
“ Fuck , I love you,” Xichen grunts and has to lean in to kiss her again, hard and frantic. “Love you A-Zhan, meimei , god you’re so good , I don’t want anyone but you ever again, you’ve spoiled me, meimei ah yes, yes- fuck !”
He barely knows what he’s saying anymore but it doesn’t matter; Wangji arches her back as he jerks upright onto his knees and one hand pressed to the mat. He does it with no small degree of reluctance, but it's worth it to get the right angle inside her to make her legs twitch further up his ribs and her mouth fall open again on a moan. She’ll probably be embarrassed later for the wanton way she’s lost control of herself now, but Xichen just holds her hips up at the right angle and watches, mesmerized, as she whimpers and her head lolls from side to side in her pleasure, arms over her head and breasts bouncing in time with his thrusts as she lifts her legs higher, her heels knocking against his shoulders, and bears down with a ragged cry to suck him in deeper — and squirt all over his hips again.
Xichen fucks her with a few more noisy thrusts but only comes again when her lashes flutter and her eyes open just enough for their gazes to meet. He does everything in his power to watch her throughout his climax, panting and groaning as he fills her up again and she watches him do it through lowered lashes, her arms still flung above her head, wrists delicately crossed in a way that makes him want to either cuff her or bite her.
“Gege,” she whimpers when he’s finished. His cock starts to soften but he doesn’t pull out; the thought of giving up an opportunity to have his sister warm his cock is just not to be borne. He leans down again to kiss her and releases his hold on her hip to slide his hand up her belly, her ribs, to cup and fondle one silky-soft breast. “Mmm,” she moans against his lips, each word interrupted by a kiss, “mm, gege..so.. good . Love you.”
Xichen’s heart thuds once and he smiles against his sister’s lips. They love each other. And Wangji, his sweet beloved a-Zhan, had even been so thoughtful as to wait until after the rush of their heated fucking to say it in return, so there can be no doubt that she meant it.
“You’re so beautiful, meimei,” Xichen murmurs. “You’ve grown up so well, how could I possibly resist you? We’re made for each other, we always have been, hm?”
Wangji nods and kisses him clumsily a few times, her mouth soft and open. “I never want to do this with anyone else,” she whispers, “I only want you to touch me. Only you can have me.”
Xichen can’t help but grin so widely Wangji has to tilt her head to kiss along his jaw instead; she really is perfect, and she’s all his. What more could he ask for?