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Sam isn’t sure how he missed the signs. He’s usually the first one to smell a change in the air, to pick up on the subtle shift in Dean’s behavior. The first to notice his brother's small acts of submission and the hint of vulnerability Dean normally masks so well. But, to his chagrin, Sam has been so wrapped up in his work this week he’s barely even seen Dean. His latest case is turning out to be far more complex than expected and he’s spent more hours with his head buried in legal papers than even he’s happy about.
Still, that’s no excuse. He should have noticed. There’s no point in kicking himself now though. The best thing he can do is focus on Dean.
Dean’s heat must have hit earlier in the day because as soon as he opens the front door Sam is smacked in the face by the heady scent of fuck-me pheromones hanging thick in the air.
He’s hard almost instantly, before he even takes off his jacket. His alpha-hindbrain screaming at him to seek out his fertile omega. To chase, to claim, to breed.
Sam forces himself to pause for a second though. To take a breath and steady himself. He ignores the instinct to storm straight to the bedroom and bury himself in his mate. He’s not a Neanderthal; he’s capable of keeping himself in check for a few minutes longer. And Dean can survive perfectly well without Sam barging in reeking of stressed and guilty alpha.
Sam hangs up his jacket on the wooden coat stand just the way Dean likes, and lines up his shoes neatly beside Cas’ loafers and Dean’s boots, just the way Dean likes, before heading to the kitchen.
While Sam has been an oblivious asshole, Cas has apparently been more attentive. The refrigerator is packed with fresh food, pre-prepared meals, and bottles of water. There’s a pile of freshly laundered bed linen neatly folded and ready for use and a note on the refrigerator door explaining that the dogs are with the sitter.
Thank God for Cas.
Two alphas and one omega in a relationship might not be a common occurrence these days, not any more common than male omegas, or two brothers hooking up, but it’s an arrangement that works perfectly well for the three of them. And Sam doesn’t give a shit what anyone thinks. Not anymore.
Sam has always wanted Dean. Always. Even before his knot popped and he realized that not only was Dean the prettiest omega Sam had ever set eyes on, he was the only omega who smelled downright edible.
Back then though, when Sam was just a hormonal high-school junior, Cas and Dean were an item. It was Cas who got to spend Dean’s heats locked away with him, while Sam tried not to be too obvious about how insanely jealous he was. Or about how often he was frantically jerking off to the scent of his brother’s heat and Dean and Cas’ muffled groans through the paper-thin apartment walls.
Thankfully, Cas isn’t your stereotypical alpha. Sure, he’s got a knot, a damn impressive one, and he’s physically far stronger than his lithe build suggests, but he’s not a possessive jerk, not usually territorial at all. And he’s intelligent, emotionally as well as stupidly book smart. He was the one who eventually figured out how twisted up Sam and Dean were about each other. He’s the one who got them stoned enough to confess all which ended up in a threesome so hot it almost melted Sam’s dick.
Of course, it’s not all been plain sailing since then. Both Sam and Dean have had their own mini-meltdowns and for a short period of time Cas thought they’d be better off without him (a notion argued against by Sam and violently fought by Dean) but now, nearly eight years down the line, the three of them… they just work. Never more so than when Dean’s heat hits.
Dean in heat is stunning. His scent, always delicious to Sam’s nose, turns downright intoxicating. His eyes seem to glow unnaturally bright and his skin flushes warm and golden beneath his freckles. His inhibitions dip so low he begs for everything he wants without embarrassment and he doesn’t hesitate to snuggle with his alphas when he craves their touch.
There’s at least thirty hours when he doesn’t like to be left alone. Not for a minute.
That’s when having two besotted alphas at his beck and call comes in handy.
Sam grabs a sandwich, gulping it down quickly before taking a shower, and washing every trace of stress and workday sweat from his skin. He doesn’t bother dressing afterwards, just roughly dries himself off and finally allows himself to seek out his omega.
When he walks into the bedroom he stops short, swaying, his knees buckling a little under the scent and sight in front of him. He has to hold onto the door frame for a full minute while his legs remember how to hold him up.
Dean is splayed out in the middle of the bed. Their bed. Signs of nesting scattered around him: Sam’s worn tee-shirts, Cas’ old woollen sweater, the ancient afghan and soft feather throw-cushions from the sofa. Dean’s eyes are closed, his eyelashes damp fluttering fans, his mouth slack on a groan. Between his spread legs, Cas kneels, hand’s hooked under Dean’s knees holding him open as he licks the slick dripping down the inside of his thighs.
Sam stumbles into the room, inelegant and careless, tripping over his own feet and knocking into the corner of the chest of drawers.
Dean’s eyes flicker open at his less than graceful entry and despite the circumstances, and Cas’ tongue dipping into his hole, he still manages a smirk. “Stealthy as always, Sammy.”
“Fuck you, Dean,” Sam snaps back automatically, rubbing at the bruise blossoming on his hip.
“That’s what we were hoping for,” Cas says, letting Dean’s legs flop back onto the bed and rolling over to lie beside him. He licks Dean’s slick from his lips, his fingers lazily tracing patterns across the omega’s flushed chest as they both gaze up at Sam.
Cas’ dick is lying mainly soft against his thigh which means he’s already knotted Dean at least once. There’s no way he wouldn’t be as hard as Sam is right now if he hadn’t gotten off recently.
“You’re late to the party,” Dean chides. “Think Cas might be about ready for a break.”
Cas leans over, his hand cupping Dean’s chin, angling his head so Cas can kiss him, deep and dirty.
Sam finds himself crawling up onto the bed to join them without conscious thought.
“I do not need a break from you, Dean Winchester. I never have and I never will.”
Dean snorts. “That’s romantic and all, sweetheart, but I don’t think your dick agrees.”
Cas presses another filthy kiss against Dean’s lips before responding. “Perhaps it is only fair that I let Sam satiate this next wave of heat. Now that he’s here.”
“You could have called me,” Sam says, knee-walking up their stupidly large bed until he’s close enough to demand his share of kisses. “You know I would have dropped everything.”
“Don’t worry, Sammy. Know you’ve been busy. Cas has been looking after me until you made it home.”
Dean turns his head so he can press his mouth against Sam’s. The taste of Cas is still on his tongue but that only makes the kiss richer. Dean whines when Sam finally has to break away for a breath. “He’s been such a good little alpha. Knotted me twice,” Dean says, almost a taunt, his lips skimming the underside of Sam’s jaw. “Filled me up with his come, bred me real nice.”
Sam groans, eyes flickering across his brother to where Cas is watching them both, a satisfied twist in his kiss swollen lips.
“He’s been waiting for you though. Been kind of impatient. Told me he wants to watch you shove your fat dick into the mess he’s left behind. Wants to watch you force his come out of my ass until it’s running down my thighs, wants to watch you knot me so deep he can see my belly bulge. And afterwards he wants to lick all that thick spunk of yours right out of my sloppy hole.”
“Jesus christ.” Sam pushes Dean over onto his back and climbs on top of him. “The mouth on you. Gonna kill me.”
“Nah.” Dean grins, grinding himself up against Sam. “It’s all Cas. You know he’s a kinky freak when I’m in heat.”
Cas leans in to nip at Dean’s shoulder. “That’s not true, Dean. I’m a kinky freak all the time.”
Sam huffs out a laugh, burying his face in Dean’s neck. This is why he loves his mates so damn much. Why he doesn’t give a single fuck that most people can’t understand the dynamics of their relationship.
Heats can be intense and overwhelming and even scary for some omegas. But the three of them are so relaxed together, so in-tune, that sex, even heat sex, is always fun. Dean is still a sarcastic asshole on the outside with a soft gooey centre hidden not too far below the surface. And Cas is still his own odd mix of dry humour, hedonism and unrelenting honesty.
And Sam? Sam will admit he’s possessive and pigheaded but he’ll also do anything to make his mates happy. And if that means fucking Dean hard enough to make him scream while Cas watches, then so be it.
Sam is one lucky sonovabitch.
“Hands and knees, Dean,” Cas says, his usual deep voice even rougher than normal. “Want to watch you be an obedient omega and present for your brother.”
“Fuck you, bitch,” Dean grumbles, even as he’s sliding out from underneath Sam and turning over to present himself, knees and elbows pressing into the mattress and tight ass curved up high. There’s something about seeing Dean displayed in this position that always gets Sam revved up. It’s probably some primal alpha instinct. Sam prefers to enjoy it rather than overthink it.
There are a few fading cherry hand marks decorating the pale skin of Dean’s ass, along with copious smears of come and slick. Sam can’t resist adding a few handprints of his own, Dean’s spine dipping as he arches up even further into each slap, his breath stuttering. They all know how much Dean loves a hint of pain during sex. How the smack of a hand against his sensitive ass can send him hurtling to the edge almost as fast as a set of lips wrapped around his dick.
Sam has delicious memories of the night he held Dean belly-down across his lap and spanked his ass until he came, tears streaming down his face, begging Sam to fuck him.
God, he wants to do that again soon. Not right now though. Now, Dean needs Sam to stuff him full.
Sam dips his fingers gently into Dean’s hole. They slide in easily. Dean’s still loose from Cas’ knot and dripping with two loads of spunk. Sam quickly lubes his cock up with the mess of Cas’ come and the slick leaking from his brother’s hole before slowly, inch by inch, sinking inside Dean.
The sound that falls from Sam’s lips would be embarrassing if Dean wasn’t repeating his name like a prayer. Sam never feels more whole than when he’s buried inside his brother. Or more alive.
Sam pushes in until there’s nowhere else to go. Until his balls are squashed almost flat against Dean’s ass, his dick surrounded by the sweet tight heat of his omega. He doesn’t move, just holds himself steady, revelling in the sensation of Dean squirming on his dick, already begging Sam to move, to do something, damnit, Sammy please.
Dean sounds good when he begs. And Sam would never try to deny that he gets off on the power he has to make Dean cry out his name.
“Does he feel good, Sam?” Cas is lying beside them, propped up on his elbow. He’s close, dangerously close, but he knows better than to touch Sam or Dean right now. Not when Sam’s almost entirely stripped down to pure alpha instinct. When he’s almost vibrating with the need to own, and mark and breed. When he’s as close to feral as he ever wants to get.
In this instant, in these few seconds, Dean is Sam’s alone. His omega. His mate. His brother. His world.
“Jesus, Sammy, fucking move already.”
Dean, of course, doesn’t have the patience to allow Sam his few seconds of alpha glory.
“Patience, Dean,” Cas says, a note of humour in his voice. “Let your brother enjoy his moment.”
“Yeah, yeah,” Dean says, full of pissy attitude but breathless with it. “He’s a big bad alpha, I get it. Doesn’t mean I won’t kick his scrawny ass if he doesn’t actually fuck me sometime this century.”
Sam growls. A mean sound that rumbles from somewhere deep below his rib cage.
Dean, the irritating fucker, laughs. It’s enough to knock Sam out of whatever alpha head-space he’s stuck in.
“I haven’t been scrawny since I was eighteen years old,” he says, his breath skimming across the shell of Dean’s ear. “When I grew six inches and pinned you for the first time.”
“It’s not all you did for the first time if I recall,” Cas says. And Sam unwittingly flashes back to the first time he fucked Dean, Cas egging him on, Dean looking up at him, eyes blown wide, cheeks flushed and lips bruised from Sam’s desperate kisses.
“Is anyone gonna fucking knot me or do I have to go find another alpha to help me out here?”
Dean’s not serious, obviously, just mouthing off the same as usual, trying to get his own way, but the threat hits Sam’s alpha hindbrain with deadly accuracy. Instinctually, his hands grip Dean’s bony hips with a possessiveness that’s sure to leave behind purple finger marks. He drags his dick out of Dean’s hole just to slam it back in violently enough to shove Dean up the bed and make him yelp.
“Yeah,” Cas says, satisfaction and awe wrapped in his throaty groan. “That’s it, Sam. Give him what he wants.”
And Sam does. Because how can he not.
Dean trembles and mewls beneath him, shoving his ass back eagerly into every thrust, urging Sam on wordlessly until eventually his elbows give out and his face hits a pillow.
Sam doesn’t even slow down. Just slaps his brother’s ass cheek with enough force to elicit a muffled yelp and pounds in deep, the new angle causing his dick to hit Dean’s sweetest spot in exactly the right way.
“That’s it, alpha,” Cas says, as if Sam needs any more encouragement than the sobbing omega writhing on the end of his cock. “He’s so hungry for it. For you. Your brother wants you, Sam. Wants you to breed him. Fill him up with your pups until he’s fat and round. Leaking milk out of his tits.”
It’s bullshit. They all know it. In the broad light of a heatless day none of them are ready for pups. Don’t know if they ever will be. Don’t care if they’re not. But fuck, if the idea of knocking Dean up doesn’t hit Sam’s kinks spot-on when he’s balls-deep inside his heat-ripe omega brother.
Cas lies down beside Dean, face to face, nudges him out from the pillow so he can kiss the dampness from his cheeks, suck on his bitten raw lips. He slides his hand underneath Dean’s belly, groans, guttural. “Christ, Sam, I can feel your dick inside him. Forget how huge you are sometimes. How deep you can fuck our boy. You gonna fill him up? Gonna flood his guts with your come until he can fucking taste it? You gonna push my loads right out of his cunt? Shove your pups all up inside him?”
Dean’s shaking in Sam’s hands now. Grinding himself down on his kid brother’s dick like it’s giving him life.
“You should see his cocklet, Sam. All wet and drippy for you. I’m going to wrap my mouth around it when you knot him. Milk the sweet come straight out of his little nuts.”
Sam’s knot is close to popping without Cas’ pornstar mouth urging him on and Sam almost wants to tell him to shut up. Almost. Because as much as he wants to last, he knows Dean needs his knot, right fucking now. Needs Sam to quell the heat pulsing through his veins. Next round, Sam will be able to take his time, draw out his pleasure and Dean’s, to make Dean beg and plead, curse, demand and threaten.
Now though, he leans over and sinks his teeth into the meat of his brother’s shoulder, hips jackrabbit thrusting until his lungs are screaming and then he’s punching his swelling knot inside his omega, knocking the breath right out of them both.
He’s just about aware enough to notice when Cas manhandles the pair of them, not without some difficulty, rolling them over so they’re resting on their sides. Sam’s still wrapped around Dean, holding him against his chest, nose buried in the crook of his neck. Knot buried deep in his ass.
Dean lets out a whimper when Cas, as promised, shuffles down the bed and, without anything in the way of preamble, sucks the omega’s dick into his mouth. Cas is an amazing cocksucker. Not as good as Dean of course, but then Sam doubts anyone is. Dean loves choking on alpha cock, swallowing it down so far his nose is resting in Sam, or Cas’ pubes, cheeks hollowed and eyes watering. Dean on his knees, mouth full of dick, is the prettiest damn site in the world. Of course Cas can’t compete with that.
But he does excel when it comes to sucking omega dick. Dean’s cocklet is only a couple inches long and pencil thick when he’s hard. Omega’s don’t exactly go around knocking anyone up so God didn’t bless them with much in the way of equipment.
Some alphas are grossed out by the tiny dicks and barely-there balls that male omegas have, but Sam thinks his brother’s cocklet is fucking precious. Cas is a big fan too. He loves taking the whole thing in his mouth, rolling his tongue over Dean’s nuts and swallowing around his cocklet until Dean shoots his tiny load.
Cas says those drops of come are the sweetest thing he’s ever tasted and Sam can’t say he disagrees.
Dean hisses and bucks in Sam’s arms, and Sam would bet anything Cas just scraped his teeth over the sensitive flesh in his mouth. Dean can bitch and moan and pretend he doesn’t like it when Cas does that, but they all know, same as with the spanking, Dean’s a pain-slut. He never fails to gets off quick and hard when there’s a side of cruelty to go with his pleasure.
Sure enough, it’s not long before Dean comes in Cas’ mouth, his hole clamping down even tighter around Sam’s knot as he full-body shivers and gasps.
Sam holds on to his writhing brother, his fingers doubtless burning bruises against Dean’s pale skin, as he rides through another wave of his own orgasm, his balls almost turning themselves inside-out in a desperate bid to knock up the fertile bitch-in-heat shedding breed-me pheromones to every alpha in the vicinity. Thank fuck for the heavy lock on the front door and the securely shut windows.
Sam only knows he’s closed his eyes when he opens them to find Cas staring straight at him, Dean still trembling through his own looping orgasm. He’ll be out of it for a while yet. Omegas might not be endowed with decent sized dicks but their compensation comes in the form of mind-blowing orgasms that keep them high and dopey long enough for an alpha or two to breed them full to the brim.
Wordlessly, Cas leans forward, tucking Dean between them, and kisses Sam. Sam moans in the other alpha’s mouth as the sweet taste of omega spunk bursts across his tongue. They kiss languidly until the taste is all but gone. Sam chasing the last precious atoms from the crevices of Cas’ mouth with his tongue.
“His belly’s bulging, you know,” Cas drops casually, against the hinge of Sam’s jaw. “I can feel it. Already full with our seed. But I’m going to lick it out of him, Sam. When your knot finally pops free, I’m going to hold your brother down and lick the spunk right out of his gaping hole. Going to make room so we can both stuff our dicks in there again. Breed him up fat and happy.”
“Dude.”
Cas looks down at Dean, surprised to see him conscious enough to talk while Sam’s knot is still buried deep inside him.
“You keep talking like that and the kid’s mutant dick ain’t never gonna go soft enough to unlodge from my ass.”
Sam grins at Dean’s spunk drunk drawl. His brother’s downright adorable when he’s fucked out.
“And it’s not like you would complain about that, Dean,” Sam says, pressing a kiss behind his omega’s ear. “You love my dick.”
“And mine,” Cas adds, pressing his own kisses to Dean’s pouting lips.
Dean mutters something incomprehensible against Cas’ mouth before burrowing even more securely into Sam’s arms.
Sam thinks Dean’s dozing off, high on his orgasm and the satisfaction of Sam’s knot plugging him up, but when Cas moves to leave, his hand shoots out, his reactions as snappy as ever. His fingers clamp vice-like around Cas’ wrist. “No, don’t go.”
The vulnerability lurking under the words turns the demand into a plea. Cas stills. “I’m just going to get a cloth to clean us up. Some water too. I’ll be right back. I promise.”
If anything, Dean’s fingers curl fiercer around Cas’ wrist. “No. Stay. Please.”
Sam isn’t sure how Cas remains so calm, his words steady and implacable even with the thread of panicked neediness that’s edging into Dean’s scent. “Sam’s right here, Dean. He’s got you. I’ll only be gone a few minutes.”
“No,” Dean says, stubbornness setting his jaw. “I don’t need water or anything else. I need you. Need you both.”
“You have us, baby,” Sam says, because they all know he’s really the sappy one and this is the only time he gets away with it. “We love you. So much. Both of us. Cas is right here. And we’re not leaving you. Not ever.”
Cas sighs and relaxes back down onto the mattress. “Fine, but don’t blame me when the neighbors break in and find three dehydrated husks stuck together by their bodily secretions in a rotting heap on the bed.”
Sam’s breath huffs against Dean’s nape as he laughs. Dean wrinkles his nose up. “Gross. Way to kill the moment, Cas.”
Cas grins. “Can I go and get you some water now?”
Dean glares at him. “No. Sneaky fucker.”
Cas kisses the freckles near the tip of Dean’s scrunched up nose, his eyes crinkling at the corners when he smiles, warm and crooked. “Don’t worry. I’ll stay. For as long as you want.”
Dean watches him warily for a few seconds before his scent loses every hint of anxiety and he relaxes back, content, in Sam’s arms. Fingers still circling Cas’ wrist, he finally lets himself drift back off on the low-thrum of knot-full satisfaction vibrating through his body.
Eventually they will have to move. Clean up, hydrate, eat. But they can do all that together until Dean’s ready to let them out of his sight.
Sam can’t think of anywhere he would rather be and given Cas’ dopey expression as he watches Dean’s face relaxing into a sated slumber, he feels exactly the same way.
Finis.
Thanks for reading.