CW: They switch. Zhongli is wearing JieJie, if you will, but still uses he/him pronouns because he doesn't identify as a woman.
There are two instances in which Childe is the most beautiful being he's ever seen:
During a fight when his mouth is curled into a half-mad grin, manic in his movements, relishing the thrill of the hunt, of the battle, to be push and pulled at, and—
Like this, underneath him, whining in the bedsheets, fingers curled around silk sheets instead as moan after moan is pushed out of him in stuttering breaths. Childe tries to hide his red face in the crook of his elbow, embarrassed. His thighs tense underneath Zhongli's hands.
Zhongli dips closer to press his mouth to the shell of Childe's ear. "Darling," he says, "don't hide from me."
"I'm— you're— oh, fuck."
Zhongli shifts his hips and rolls into him, the thick stone cock dragging across Childe's insides. He gasps, a hiccuping sound that causes the heat to curl in Zhongli's stomach as he fucks into him over and over.
This form is not his preference. He prefers the sharper angles of Zhongli to the soft, subtle curves, and bosom of Jie Jie. But there is something to be said about variety in the bedroom, especially when it comes to the way it affects Childe.
"Look at yu," he'd said earlier, cupping a full breast, thumb swirling over the nipple, tweaking it gently. "Divine, even like this. How lucky I am."
Zhongli is the lucky one. Even when dressed up as a female, he still gets to wreck Childe wholly and fully. Still gets to see him shudder underneath his grasp, ass tight around a thick length. He just prefers that it was his own. Still.
"I can imagine it," he says, leaning back to watch where Childe is spread deliciously around him. "I can still feel it, the way that you squeeze so tightly." And this is good—this is still good, thinks Zhongli as he grinds into Childe, the flat of his own groin pressed against the leather of the harness. The thick, stone cock that's snug in his own cunt.
When they indulge like this it's usually Childe pulling the gasps from his mouth. It's Childe who sinks into him with languid and seeking strokes while his hands trail his skin and his mouth calls him perfect. But today—
"And what if I still want you to fuck me?"
They'd opened each other up with impatient touches, Childe's ass tight around his knuckles. The loud squelch of his own wet sex around Childe's fingers. Perfection in its purest form. Zhongli cannot think of somewhere more so than right between Childe's legs, coaxing him into delirious pleasure.
"Come on," says Childe suddenly, lifting his hips, seeking out friction. Zhongli hadn't realized he'd paused in his thoughts. "Fuck me."
Zhongli chuckles, his voice coming out high-pitched and tinny. "Ajax," he murmurs, lilting and soft. He settles across the length of Childe's body, ample breasts flush against his chest. Zhongli groans as his nipples slide across sweaty skin, peaked stiff with arousal.
And oh, it drips off of Childe, the thick lust of it all. It hangs heady in the air, smelling of spice and cold winter frost. Inherently his mate.
Zhongli fucks into him faster, pulling his hips back until the tip of the stone cock is pulling at Childe's rim. He thrusts into him harder and Childe jerks.
"Yes," he cries out, clinging to Zhongli.
Pricks of nails down his back. Childe's sweet, breathy moans against Zhongli's breast as he laps at peak of it. The tightness of his legs around Zhongli's waist as Childe refuses to let him go. Zhongli drowns in the sensations of their love-making. This is all that he's ever wanted, to love someone so much that fucking them is always like coming home.
Zhongli shifts again and the angle changes. Childe keens, his voice raspy with want. He moves against Zhongli, grinding against his cock, reaching down between them to palm at his aching dick.
His hand is batted away. "No," says Zhongli, perhaps a bit cruelly. "You asked for me to take you like this. You begged for this cock, so you're going to come from it alone."
Childe whimpers but nods. "Okay," he murmurs. "Okay, okay—there. Oh gods, there, that's—"
Zhongli wrenches his name from Childe's mouth with every drag of his cock. He moans when he pulls back, his own cunt clenching around the thick length shoved inside himself. The drag of his clit against soft letter with every driving motion.
"Ajax," he hisses, nuzzling at his nape, nipping at his skin, marking it up to delight in later.
Childe's hands find his ass, pulling at the cheeks, marveling at their soft give. And then, the dip of his fingers right between, ghosting over his rim, teasing. "Come on, Zhongli, give me more," he begs.
Zhongli pulls out abruptly, much to Childe's surprise. He flips him onto his stomach easily and spreads his ass, watching as his hole tries and fails to clench. He drags a thumb over it before dipping in, testing the give of the puffed and straining muscle.
And then he slides his cock back in roughly, fucking Childe hard and fast.
Childe wails and Zhongli watches. His hole clenches tight around the cock as Zhongli ruts against him. The pressure builds in Zhongli's gut. He grunts as he moves, his cunt aching. It isn't enough, despite being stuffed full, despite the friction, despite the way that Childe cries into the sheets below him.
Morax, Zhongli, R-Rex Lapis, fuck, fuck, fuck—
Childe is more than close, he's teetering on the edge of his orgasm, his cock hanging thickly, the tip dragging across the bed sheets. Zhongli plasters himself across his back, breasts rubbing over Childe's sweaty skin. He fucks him harder, gripping at Childe's hips hard enough to bruise.
So close, he thinks. So, so, so—
Childe shouts when he comes. His cock twitches and paints the sheets white. He buries his face into the pillow to hide his pitiful sounding voice. Zhongli slides a thumb down to where they're connected, feeling the way that his rim clenches tight.
Imagines it's his cock proper and not this cheap imitation of it. Wishes that he'd filled Childe up so he can see his spend dripping right back out.
Zhongli hasn't come yet, but he's close as well, the insides of his trembling thighs soaked down to his knees. He lingers there, hair-trigger, nerves alight. It would take so little to end him.
And Childe knows that. Childe does not wait to recover before sliding off of the stone cock. He rolls onto his back, palming at Zhongli's ass, pulling and tugging at the straps of the harness. "Off," he mutters, mildly frustrating when they don't budge easily. "Off."
Zhongli slices through the harness with a claw, uncaring that it will need to be replaced. When Childe yanks at him impatiently, he goes, sliding along the length of him until he's guided right above Childe's face.
Oh. Zhongli is suddenly hyperaware, eyes narrowed to slits as he looks down at Childe.
Childe watches back with bright eyes and a debauched gaze. "Beautiful," he says, kissing the inside of Zhongli's thigh, tongue snaking out to lap at the slick that coats it.
Oh, oh, oh.
"Ajax."
"I want to eat you up," says Childe, nipping at the spot where Zhongli's thigh meets his leg. "I want to devour you," he finishes, thumbing over his wet folds before easing out the cock that Zhongli had pressed into himself earlier. And then his shoves his fingers into Zhongli's sloppy hole to the knuckle.
"Ajax," he repeats with a sigh. "Ajax," he curses when Childe licks over his cunt, tongue diving into his folds.
Zhongli cannot help the way that he bucks against Childe's face. He rests himself on one hand as the other slides into Childe's hair, pulling. Childe groans against him, scalp stinging, but doesn't stop; he swallows up everything that Zhongli offers him as though it's his last meal.
He rides Childe's face, rolling his hips against that treacherous tongue. Childe pulls out his fingers, encouraging him, pulling Zhongli against his mouth until he's practically smothering his face. "Celestia," says Zhongli, losing himself at the sight. He can barely think with the heat of Childe's mouth against him, and the slick wriggle of his tongue.
Childe kisses him. Pets over his skin as his nose gets buried into the coarse hair at the apex of his thighs. Zhongli feels the way that he leaks everywhere, coating Childe's face with slick.
Nearly there, nearly there.
Childe suckles his clit, pulling it into his mouth. Zhongli throws his head back, legs going taut. He snaps and comes right then and there, drenching Childe's face. "Fuck," curses Zhongli. And then: "My darling, darling Ajax."
It is a slow come-down. Childe pulls Zhongli's face to his own, kissing him, letting Zhongli taste himself all over his mouth.
Divine, indeed, thinks Zhongli, licking into him, seeking out the warmth of Childe's tongue with his own, sucking down breath after breath as they just moan and kiss and ride the tail-end of that golden haze.
"Are you okay?" asks Childe sometime later, dragging his hand across the length of Zhongli's side. His thumb catches at the swell of his breast, sweeping against the underside before testing the weight of it.
"Mhm," hums Zhongli. "Yes."
Childe shuffles closer, pressing against him and burying his face into the softness of his chest. "Can you stay like this a little bit longer?"
This form itches. Zhongli feels his power prickle along his spine as he struggles to hold off shedding his femininity like a second skin. He pets through Childe's hair instead, nails catching on thick, auburn curls. "Yes." This time, it's said with a soft chuckle.
"I could drown in your boobs," he says, a little childishly. A pause. "Actually, I nearly did drown. I don't think I've seen you that—"
"The wonders of seeing you below me, at my mercy."
Childe sighs contently, kissing the tip of his breast. Then his mouth wanders, his tongue peeks out to lick across his nipple, and he's half-hard again, cock grinding against Childe's thigh—
"Ajax," says Zhongli, yanking slightly on his hair.
"What was it you said? Seeing me at my mercy? For me it's just seeing you in general. Gods, I still want you." Childe shifts then, his hand dropping between him to slide across his cunt. Zhongli tries and fails to hold back his moan.
"I swear—"
"It's never enough." Childe's voice is soft as he whispers it against Zhongli's breasts. "I feel like I can do this forever."
Zhongli knows this far better than Childe can begin to comprehend. "Very well," he says, rolling Childe back onto his back. "But make no mistake—it is I that is going to pull you apart." His cock is stiff against Zhongli's ass, twitching. Zhongli cups a breast, making a show of himself, watching the way that Childe's breath hitches and he swallows thickly.
Then, he dips low, kissing the shell of Childe's ear. "Again," says Zhongli. "Again, again, again."
Which, of course, he's a man of his word.