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Clark is awoken to the sound of a baby crying and a thick scent clogging his nose. By the time he has rubbed the sleep from his eyes and is fully awake, the baby has stopped crying, and Bruce is throwing aside his silk robe and climbing back into bed, half-asleep already. He collapses against the pillows and is out within seconds, his breathing evening out, his limbs losing tension. Clark realizes the scent grew heavier as soon as Bruce returned to bed – it is Bruce’s heat, arriving four days early. He moves over and covers Bruce’s naked body, kissing and licking down warm skin, following the scent down to Bruce’s swollen cunt, red and abused from when Clark had fun with it yesterday.
He parts Bruce’s pussy lips and presses his tongue to the entrance, licking at the hot flesh, drawing out Bruce’s slick. He sucks at the liquid as it begins leaking, relishing the sweet taste, like honey.
Pressing a finger against Bruce’s asshole produces more slick, and Clark works at his cunt till he is dripping copiously. Then he climbs over Bruce’s sleeping form, lifts his omega’s legs and wraps them around his hips, then lines himself up with his cunt and carefully presses in. Heated flesh squeezes around his cock and Clark groans, muffling the sound behind tightly pressed lips, so as not to disturb his sleeping princess.
He keeps his thrusts long and slow, pulling out until Bruce’s hole is obscenely stretching around his broad cockhead before thrusting all the way back inside. The base of his cock is pulsing with the urge to knot his mate, the urge to breed him full. Bruce can’t get pregnant, he’s got the IUD, but just the thought of filling Bruce up with his come, making Bruce heavy with his pups, makes his hips snap a little bit faster. He nears orgasm, his knot beginning to swell.
Bruce whimpers when the knot stretches him, rousing awake. He gasps as the feeling of his heat, his cloying scent, the swelling of Clark’s knot, all come crashing down on his senses. Small hands clench at the bedsheets, soft cries ringing like music in Clark’s ears. Bruce’s orgasm releases at the same time as Clark’s, hot and silky fluid cascading down Clark’s cock and balls as his own thick release fills up Bruce on the inside.
Clark flips them around, gently laying Bruce against his chest, carding his fingers through Bruce’s hair as he waits for his knot to subside. Bruce sinks heavily into his touch, still sleepy and a little dazed from the sudden heat.
“Clark…” Bruce moans, lifting his head to look at Clark, “alpha… what’s the date?”
Clark smiles, rubbing a thumb across Bruce’s flushed cheek. He’s pink in the face and sweaty and his hair is sticking to his forehead, the most adorably confused expression on his face. Clark leans down and kisses his nose, lingering for a bit to inhale his scent.
“Four days early, I think I fucked you too hard last night,” he chuckles, “kick started your heat.”
“So f’ckin’ rude of you,” Bruce mumbles, back arching as a cramp shoots through his abdomen. Clark immediately brings a hand down to his belly, gently pressing into the muscles, massaging through the skin around the bulge of his cock and knot to ease the pressure in Bruce’s abdomen.
Bruce’s moans are muffled into Clark’s chest, his hips slowly rocking again, Clark’s knot pulling against his stretched entrance and sending bolts of pleasurable pain through his spine. Tears soak into Clark’s chest, running down the planes of his pecs, smearing between his and Bruce’s bodies.
Clark wipes some of the tears away with his thumb, licking the salty substance off his finger.
Bruce is pliant underneath him, his hole slowly getting even more slick and soft, until Clark can pull out his knot and fuck Bruce with it. Bruce keens, digging his nails into Clark’s shoulders. clenching frantically around the knot. The lewd squelching sounds of their coupling fills the room, Bruce’s cunt dripping with his slick and cum. He leans upwards, nosing into Clark’s neck, mouthing and sucking at his scent gland, soft whimpers leaving his lips. It’s a silent plea, and Clark obliges, wrapping a hand around Bruce’s neck and turning it to the side, sinking his teeth into the mating gland at the juncture of the neck and shoulder. Bruce moans obscenely load, throwing his head back as his head swims with pleasure, his alpha’s knot fucking him brutally, his alpha’s teeth claiming him whole.
“Make me full, alpha, full please,” Bruce mewls, pressing a hand to Clark’s balls. Clark growls and flips them over, pinning Bruce to the bed, pressing his hips flush against his omega’s and filling him up for the second time. This time, he doesn’t pull out, he rocks his hips while pressed firmly against Bruce’s ass and keeps him plugged with his knot, watching Bruce’s belly as it swells with his cum.
He purrs in satisfaction, leaning down to kiss Bruce, one hand pressed to Bruce’s swollen belly, massaging the swell of his cock and knot and cum. Bruce moans into his mouth, reaching his own orgasm, soaking Clark’s cock and the bed sheets with his release. Clark drags his fingers through some of the spilled cum and then runs them up Bruce’s body, streaking him with cum till he reaches his lips. He pushes two fingers in, rubbing them against Bruce’s tongue, shoving them down to his throat to smear his cum into it. Bruce blinks up at him with a dazed look, then reaches up with one hand to pat his cheek.
“G’nigh’ a’pha,” he slurs, hand dropping back to the bed. He’s out like a light shortly after, sucking sweetly on Clark's fingers. Clark smiles and leans down to kiss his omega’s forehead, resting his weight against the pillows for the next twenty minutes. When his knot has gone down, Clark pulls out, and a flood of cum spills out of Bruce’s cunt, soiling the sheets. Clark gathers Bruce in his arms and rolls them away from the soaked spot, cuddling together in the far corner of the bed. The sheets are a mess and definitely need changing, but Bruce is sleeping too soundly for Clark to disturb him. He’ll change the sheets when morning comes, and Bruce’s heat is at its low point on the scale.