Pairing: Sam x Dean
Rating: 18+
Tags: A/B/O, Darkness magic, Alpha!Dean, Omega!Sam, Dub-Con (biological necessity), little bit of meta (cuz why not), Sam’s a needy mess, Dean is possessive af
Word Count: 4k
Despite the many apparent flaws of these British Men of Letters dicks, at least Mick has the good sense to let Dean and Sam go. He offers to try helping Sam, but he doesn’t have any more ideas about his condition than that blonde bitch does, so Dean declines and gets Sam the hell out of dodge.
The moment they make it over the property line and past the efficacy of the anti-angel warding Cas is by their sides, sliding under Sam’s other arm to help Dean carry him to the Impala.
“Don’t touch him,” Dean growls, startling Cas and himself. Cas raises his hands in a show of good faith.
“I am just trying to help, Dean,” he reassures the hunter, lowly.
“Yeah, um, sorry man,” Dean shakes his head to clear it. He doesn’t know why he doesn’t like the idea of anyone else touching Sam right now but he doesn’t want anyone’s hands on his baby brother. Begrudgingly, he lets Castiel grab Sam’s arm and help them to the car, where they gingerly lay a shivering, and for all intents and purposes unconscious, Sam on the back seat. “Cas, what’s wrong with him?” Dean tries to keep a grip on the panic in his voice but he doesn’t have much luck.
“It’s hard to be sure,” Castiel mutters, laying a hand against Sam’s forehead, which is burning hot. “We need to get him home immediately, this fever is dangerously high.”
Dean rounds the car to root through the first aid pack in the trunk, pulling out a few instant cold packs. “Here,” he cracks one up in his hands and passes it to Cas. “Get in back, try to keep him cool.” Cas slides into the back seat of the Impala, pulling Sam over his lap and pressing the cold pack against the young man’s forehead. Dean drops the spare cold packs beside him as he jumps in behind the wheel and peels out of the dirt road driveway in reverse, gunning them back home towards Kansas.
The use of cold packs and bags of ice they picked up at gas stations along their way get the trio home without Sam’s condition worsening. Dean would send up a thank you to Chuck for that except that he’s nearly positive Chuck’s sister is the reason Sam is in this mess in the first place. I thought she wanted to do something to thank me, not destroy my life. They get Sam into bed without too much trouble, and Castiel suggests stripping Sam out of his clothes to help keep him cool.
“Get away from him,” Dean growls, baring his teeth at his friend. Castiel once again looks at him in confusion, his brow crinkling as he stares hard at Dean.
“I’m going to call Rowena, see if maybe she can help us determine what is wrong with Sam.” Cas backs up cautiously, and Dean is glad to see him go.
Once he’s alone with his brother, he does think that stripping Sam down is a decent idea – at the very least he should change him into some clean pyjamas instead of the bloodied tatters he’s dressed in now. Dean sits on the edge of the bed, gently brushing Sam’s hair away from his eyes. He has the sudden urge to lean down and kiss Sam, so he does – very carefully placing his lips against his little brother’s forehead. It seems to Dean like Sam presses back into the kiss, and when his lips retreat, Sam stretches his neck and turns his head into Dean’s side, almost like he’s burrowing there. The unconscious display of affection brings a surge of warmth to Dean’s chest, though he can’t find it in him to smile with Sam like this.
Gingerly, Dean unbuttons Sam’s shirt and eases it over his shoulders, his fingers tracing over Sam’s muscles on the way down each arm. He hadn’t spent too much time around Sam’s unclothed chest recently and he couldn’t help staring at the contours of his frame. Sometimes he spends so much time thinking about Sam as his little brother, he forgets how much he’d built himself up over the years, forgets about the strength that all those layers of shirts they wear everyday are hiding. Dean has to shake himself in chastisement for staring at Sam’s body and lusting after it like a creep when he’s supposed to be taking care of him. How could he be thinking with his dick, even now, when Sam is deathly ill? But he was thinking with his dick, because even seeing Sam half naked for a matter of thirty seconds seems to be enough to give him a semi. For fuck’s sake, Dean curses himself, and sets about the task of easing Sam out of his torn up jeans.
As he gets Sam’s abnormally long jeans off his abnormally long body, three things strike Dean as odd. The first, that the smell he’d overwhelmingly associated with Sam back at the farmhouse in Missouri all of the sudden permeates the air around him. Sure, he’d been smelling it this whole time – it had been almost unbearably strong on the 6 hour drive back to Kansas – but he figured he must have gotten used to it because it had sort of faded into the background until just now. Secondly, the way Sam’s legs were splayed out across the bed right now gave Dean a view of a dark wet patch on the light grey of Sam’s underwear – gross, Dean thinks to himself, until he realises that the stain isn’t on the front of Sam’s briefs like it would be if he’d pissed himself. That examination leads him to his third odd discovery, which is that Sam has a boner.
“Well, what have we here?” Dean spins to see Rowena standing in the doorway, smirking.
“I’m sorry, Sam’s turned into a what?” Dean blinks incredulously at Rowena, who’s perching on the edge of the table in the kitchen. He turns his head to look at Castiel, who is sitting stoically behind Rowena. The angel shrugs unhelpfully.
“An Omega, dearie,” Rowena enunciates more clearly, like she imagines she’s talking to a four year old.
“Right,” Dean nods, although he doesn’t really understand. “And I’m a–”
“An Alpha, yes,” Rowena reiterates, clearly annoyed Dean isn’t getting this. “Well, Sam’s Alpha, more specifically,” she amends.
“And what exactly does all this mean?” Dean grunts, frustrated.
“It means that you and Samuel are mates,” Rowena elaborates.
“We know that, we saw our shared heaven, like a decade ago. What the hell does it have to do with him being sick?”
“Samuel is sick because he’s an Omega in heat, and he needs his mate.”
“Well if I’m his ‘mate’ and he ‘needs me’ – I’m right here! So why isn’t he better?” Dean growls.
“I believe,” Cas clears his throat, “from what I understand of the traditional elements of this condition, that what Rowena means is that Sam needs you, as his mate, physically.” Cas looks sheepishly at Rowena for confirmation.
“Precisely,” she smiles thankfully at Castiel.
“Physically?” Dean’s not any closer to understanding what’s happening. “So what, I need to go hold his hand until his fever breaks?”
“Well, I’m not surprised that you might want to hold his hand, but it’s going to take a wee bit more than that.”
“Will you just tell me how the hell to cure him?” Dean shouts, accidentally shattering the beer bottle he’s holding. He looks down, surprised at his own strength and at the end of his tether now.
“Sexual intercourse,” Cas answers shortly, his face carefully blank. “Though, again, from my understanding, that will only cure his heat. He will remain an Omega and you will remain an Alpha.”
“What the hell are you talking about ‘from what you understand’?” Dean makes indignant air quotes at Cas.
“When Metatron put all of popular culture into my head it included every story ever written. There are a large number of stories on the internet that incorporate the dynamics of the Alpha/Omega hierarchy. It’s a trope primarily found in something called ‘fanfiction’,” Cas explains. “In fact, there is some ‘fanfiction’ about yourself and Sam if it would help you to understand the mating requirements.” Dean feels like he’s going to be sick.
“Cas, listen to me very carefully: under no circumstances are you to ever tell anyone else that those exist,” Dean groans, rubbing the heels of his hands into his eyes. “Why is this happening?”
“That’s the part I’ve not got the faintest idea about,” Rowena sighs. “It would take something more than a simple spell to alter your anatomies like this. Not even an angel,” she glances at Castiel quickly to check she’s right in her assumption. “I’ve never heard of something like this actually happening outside of fiction.”
“It was Amara,” Dean sighs. “When she left she told me she was going to give me what I ‘needed most’, but I don’t know why she thought this was it. It just seems like some sick joke.”
“Ah,” Rowena nods sagely like she understands now. “She was giving you Samuel.”
“How is this ‘giving me’ Sam?”
“A physically bonded Alpha and Omega are bonded for life, inseparable. Without the other, they won’t survive their heats – or ruts, in your case.”
“So every time Sam goes into a heat, we need to have sex, or he dies?” Dean can’t believe how fucked up this is.
“You’ll also need to knot him,” Cas adds gravely. Noticing Dean’s look of incredulity, he continues. “The base of your penis will inflate when you ejaculate and lock you and Sam together for a brief time. It’s the knot that Sam needs to relieve the symptoms of his heat.”
“What the fuck?” Dean blanches.
“Not to importune but I do believe Samuel was running out of time when I examined him. You really should get to it, Dean,” Rowena cuts in.
“And how am I supposed to do that, huh? The guy’s unconscious! I can’t just–” Dean’s stomach roiled. The thought of fucking Sam was tempting, amazingly so, but the thought of doing it to Sam, without his knowledge or participation, was sickening.
“I can make him a wee draft to revive him and stave off the fever,” Rowena moves towards one of the cupboards in the kitchen where Sam keeps the common spell ingredients. “Then Castiel and I can make ourselves scarce and leave you two to it,” she smiles.
“And you’re positive this is the only way?” Dean presses desperately.
“That Amara is a crafty woman, she knew what she was doing.” Rowena throws some herbs into a small dish. “She saw that you would never ‘put the moves on Sam’, as you say. This is her way of giving you both that little push.”
“Yeah, well, she’s a bitch,” Dean grumbles, dropping his head in his hands and waiting for Rowena to finish the potion to wake Sam up.
Sam blinks awake wearily, vaguely aware that he’s safe and not being held captive anymore, but he can’t remember much more than snippets of sound and scent. The rumble of an engine, the smell of motor oil; the low tenor of Dean’s voice, and the scent of whiskey, apple pie, and old leather. He can make out all of those scents now, too, swirling around him and pulling him back into consciousness – like smelling salts.
“Hey, there he is,” Dean’s voice says nearby, he’s sitting on the side of Sam’s bed.
Sam nuzzles towards his older brother, inexplicably craving the closeness. “De,” Sam mumbles, still sleepy.
“Yeah, it’s me Sammy,” Dean smiles down at him gently, eyes soft. Sam feels an unusual rush of need wash over him like a heat wave and he presses himself as close to Dean as two bodies can possibly get with a blanket still in between them.
“Wha s’happening?” he grumbles into Dean’s chest, looping his long arms around his brother’s waist.
“Short version?” Dean scoffs, but not unkindly. “Listen man, I’ll explain everything, I promise but – right now I just need to make sure you get outta this in one piece,” Dean sighs, drawing his hand down Sam’s face and holding his cheek. Sam looks up at Dean quizzically, unused to the level of physical affection but finding he was in desperate want of more. He nods at his big brother – whatever’s wrong, he knows Dean will take care of him. “You trust me Sammy?” Dean’s voice is hoarse, and Sam realises he’s scared.
“Yeah, Dean,” Sam breathes quietly into the slowly decreasing space between them. “Course I do,” he confirms again.
“Alright then,” Dean gulps and nods, mostly to himself though, like he’s trying to psych himself up for something. Then without any further warning, Dean’s lips are covering Sam’s and pressing him down onto the bed.
The fire that had been smouldering inside Sam for days now leaps and dances, as if Dean’s kiss is gasoline being thrown across him. Sam clings to Dean as he’s laid back onto the bed, and lets Dean climb into his lap and bury his hands in Sam’s hair. Dean licks across the seam of his lips and Sam parts them willingly, drinking in every bit of Dean that is being offered to him. He can’t remember why he needs Dean like this so badly, or when he started needing him, but now that he has him he couldn’t care less. He knows with certainty that the only thing he needs to be happy for the rest of his life is Dean – Dean loving him, Dean kissing him, Dean inside him. Fuck, he needs Dean inside him right fucking now.
At this realisation, Sam starts tearing into Dean’s clothes, ripping through the thread keeping buttons in their places without a thought. He expects Dean to start doing the same to him, but then realises he’s not wearing anything but his underwear, which suits Sam just fine. Dean has to pull away from him to wriggle out of his jeans, and Sam groans involuntarily at the sight of the bulge Dean reveals when he strips down.
“Someone likes the view, huh?” Dean teases him, voice deep and throaty, but Sam’s too far gone to come up with a bratty retort. All he can focus on is that he wants Dean’s cock – now.
“Shit, you look so big De,” Sam groans, reaching out a hand to cup around Dean’s member, still hidden behind black cotton. The front of the material is wet with precum, Sam can feel it against his fingertips.
“Think you can handle me, little bro?” Dean grabs Sam’s wrist and drags his fingers along the outline of his cock, up to the elastic waist of his boxers, and then inside them. Sam’s fingers curl around Dean and stroke him gently beneath the fabric. “Think you can fit all that inside your tight little ass f’me?” he grunts, thrusting into Sam’s grip.
“Fuck yes,” Sam rasps, and his breath sounds like it’s raking over hot coals in his throat. He pulls back from Dean to shed his own underwear, staring at it puzzledly when it comes away from his body covered in slick. What is that, he wonders as he feels it on his fingers. It doesn’t feel like lube… “Dean?” Sam looks to his brother for answers.
“S’okay,” Dean rushes to reassure him, joining his little brother on the bed, both of them now completely bared to the other. “I’ll explain later, yeah? Just let me take care of you right now, okay?” Dean’s eyes are wide and pleading as he looks to Sam, and Sam nods; he trusts Dean. “Just lemme take care a’you,” Dean whispers again as he brushes their lips together, and Sam pulls him in tight for another bruising kiss.
Their bodies twist and tangle easily, Sam just letting Dean put them together however he wanted. The heat of Dean against him is overwhelming, the sweat on their skin mingles and sticks them together, pulling at their nerves every time they part. Sam doesn’t want them to part. He reaches between them, grabbing Dean’s cock in his hand and thrusts his own into the same grip. Their moans ring through each others’ mouths as Sam jerks them against each other, and they take turns fucking into his fist. Before long Dean pulls away from Sam with a groan, probably to stop himself from finishing before he’s had a chance to see what the inside of his brother feels like. Sam is glad of his consideration in this case, because if he ends tonight without Dean locked firmly inside of him, he’s going to feel like he’s missing out. If he was more clear headed, he might question why the phrase ‘locked inside of him’ is the one that came to mind but he’s not thinking too deeply about what he wants right now — he just wants.
“Need you, Dean,” Sam pants, widely, grabbing at Dean, trying to bring their bodies back together. “Need… ne—” Sam’s vocabulary has become shockingly singular, and he doesn’t have the presence of mind to be irritated with his brother when Dean smiles down at him smugly, knowingly.
“I know what you need, Sammy” Dean grins down at his little brother. Having Sam this strung out and desperate for him is like a drug. I could get used to this being a monthly thing, he smirks to himself, reaching his hand down between Sam’s legs and rubbing at his slick entrance. “Need me right here, dontcha Sammy? I can feel how much you need me,” Dean groans as the tip of his finger slips inside of Sam too easily, “fuck, you’re wet. So fucking wet for me, huh Sammy?”
Sam just nods blissfully down at Dean; it seems his vocabulary of one word has now receded to zero.
Cas had warned him about this, that as an Omega, Sam would start leaking like a fire hydrant, but at least it saved him having to hunt around for some kind of lube — he’d never needed to have that on hand before, and if he found any lying around the bunker there’s a decent chance it would be cursed or something. Plus, he bet this made the whole experience way better for Sam, so he was all for it. Dean moves between Sam’s legs and runs the head of his cock over Sam’s twitching entrance. Sammy lets out a weak moan and arches against the pressure, trying to get Dean to slip inside. Dean’s about to oblige when he remembers what Cas said about them getting locked together by the Alpha’s knot once he comes, and he thinks better of their position. It will be easier to roll on to their sides and rest if he does this with Sam on his hands and knees.
He manhandles Sam into position, rolling him over, and when Sam gets the idea and pushes himself onto his hands and knees, arching his back and presenting himself to Dean like some kind of trophy, Dean can’t hold himself back any longer. He pushes his cock inside Sam slowly, agonisingly and torturously slowly. Not because he’s concerned about hurting Sam, who is opening up beneath him like he was born for this — born to take Dean’s cock — but because he knows he wants to savour this moment for the rest of his life. He wants to remember every second of the first time he felt what it was like to truly possess Sam, to be joined so completely to one another that not even their bodies can keep them separate. So Dean goes slow, even though Sam is begging beneath him, asking him to just fuck him already, Dean ignores him, and he drinks the feelings in.
When he’s got himself bottomed out inside of Sam he leans down over his brother and presses a kiss to his shoulder, tenderly, thanking him for what he’s giving Dean right now. “You feel so good Sammy,” Dean moans, and he doesn’t mean for it to sound as sappy as it does but it’s hard to regulate things like that when you feel like you’ve just connected to your soulmate for the first time, so he gives himself a pass.
The next time Sam begs, Dean gives in, snapping his hips back and fucking into him as hard as he can manage. And once he’s started he can’t stop. Every instinct inside of Dean is shouting at him to take, to fuck Sam into the mattress and never let up, which Sam doesn’t seem to mind, because no matter how roughly Dean thrusts into him he keeps shouting for more, faster, harder, please. So Dean, ever the good big brother, gives Sammy what he needs — what they both need.
Dean can feel himself getting closer and closer to his release, and that’s when he notices that he can’t quite pull out as far as before. His knot has begun swelling at the base of his cock, getting ready to pop and bind him and Sam together. The fattening edges catching on Sam’s rim give Dean a kind of friction no sex ever has before and, fucking hell, it feels unbelievably good. He grinds himself harder against Sam, dropping over his back so they can be as close as possible, and bringing his hand up beneath Sam to grasp at his little brother’s dick. It’s the first time he’s properly touched it, felt it in his hand, and shit, it feels even bigger than it looks.
“Oh my god, Dean,” Sam groans, sounding absolutely wrecked, and Dean takes that as a compliment. “Fuck, don’t stop, don’t stop, fuck, please,” Sam is pleading with him so prettily, and Dean wants to cum just as badly as him.
“Not stopping Sammy,” Dean strokes him faster, grinds into him harder, “not stopping until you cum all over my hand baby boy, so c’mon, want you to cum f’me.” Dean thanks God that Sam starts to cum loudly when Dean tells him too, because the second he feels Sam start to convulse around him his knot pops and he’s cumming harder than he ever has in his life. The thought of his seed whitewashing Sam’s insides is sickeningly thrilling and he swears a second, small orgasm rocks through him — and hey, if that’s a perk of being an Alpha, I could get used to this.
When Dean comes back to himself, his breathing finally evening out, he notices Sam slumped beneath him, no longer holding himself up. He quickly checks for a pulse, and relaxes when he finds one – Sam’s just passed out. Fuck, he came so hard he passed out. Dean shudders, feeling another small blurt of cum force itself out of his cock at the thought that he’d fucked Sam so thoroughly. To be honest he was a little proud of himself.
Dean arranges himself on his side on the bed, so he can curl around Sam while he waits for his knot to deflate. He thought he’d be annoyed by having to stay still like this for so long but it’s surprisingly peaceful, laying here with Sam asleep in his arms. He hugs his little brother tighter to him, clasping his hands over Sam’s chest – over his heart – feels the rhythm and reassures himself that Sam is here, and alive, and safe. And his. The realisation hits Dean unexpectedly. Sam is finally his in the most permanent way he can think of, and his heart leaps at the thought. The last thing he thinks before he drops off to sleep too, is that he hopes Sam still wants to be his when he wakes up.
Write The Life You Want 