Lucifer knows what he's getting himself into. That's what he tells himself, anyway.
It's what he tells himself as he approaches Sam during his heat, fills the air with the kind of soothing Alpha pheromones he's sure will help his destined Omega vessel and asks Sam what he can do to help. He expects Sam to turn him down and to have to try again next heat, slowly prove to him that they are meant to be until Sam says yes to him. He's not expecting for Sam to leave his comfy nest. He smells perfect, like everything Lucifer hasn't had in centuries, safety and home and love, and it leaves him unsteady on his feet when Sam takes hold of his arm and leads him back to his bed.
Lucifer's happy to let Sam use his knot for as long as he needs. He's desperate to feel Sam wrapped tight around his cock, a need that only grows as he's finally allowed to bury his nose in Sam's neck and feel how warm his soul is pressed into Lucifer's grace.
He's so lost in Sam that he doesn't notice he's being pushed down into the mattress until his cheek is against a pillow. His cock hangs heavy and hard between his legs. Sam ignores it in favor of blanketing his body over Lucifer's, his sharp Omega teeth nibbling Lucifer's throat, teasing at his scent glands. Lucifer whines, bowing until the head of his cock rubs the mattress. Sam follows him, hip to hip, chest to back, his mouth never leaving Lucifer's sensitive neck. Lucifer can hear the sound of his Omega being penetrated, and he squirms under Sam. It should be his fingers inside Sam, his tongue tasting his slick, his cock filling him up, but then Sam bites a little harder against his scent glands and purrs sweet in his ear. Lucifer can't help but capitulate to what his Omega wants from him. Sam rubs himself against Lucifer's ass a few more times before his fingers probe gently at Lucifer's hole. They're covered in Sam's slick.
"You came here to help me with my heat?" Sam asks as Lucifer is stretched open around his fingers. There's a delicious ache that comes with being filled that makes Lucifer relax further under Sam. "Aren't you going to mount me, Alpha?" He punctuates that with a deep thrust, a slow grind of the tips of his fingers into Lucifer that makes his cock twitch. Lucifer squirms again, but Sam holds him still beneath him, mouth on his neck and one hand on his hip, spreading his fingers to loosen Lucifer up.
"Sam," his name rolls out of Lucifer with a groan, "I can't- If you're- Mm." It's hard to think. Sam's scent makes his head spin. Instinct has him thrusting forward against the mattress, but that isn't half as satisfying as rocking himself against Sam's fingers. Sam reaches back for more of his own wetness to coat Lucifer's hole in. He exhales in pleasure as he does before pushing his fingers right back inside Lucifer. Lucifer growls happily. He's going to smell so much like Sam when they're through. Everyone is going to know who Lucifer is claimed by. There's an itch in his jaw to twist around and sink his teeth into Sam's neck or shoulder, assert his own claim, but it vanishes as Sam strokes his prostate. His knot throbs.
"Yeah, lay there and take it," Sam says. Lucifer's neck is sore, but the skin hasn't broken in a true claim yet. Sam is taunting him with that possibility. Sam pulls his fingers out. "You're going to look so good filled with my pups."
"I don't think I can carry-" Lucifer tries to tell Sam. Sam bites him, and it's so close, so sharp. Lucifer arches up for more, and Sam gives it to him. A slow, tight push of his smaller cock into Lucifer, making Lucifer moan. Sam rolls his hips back and it slides all the way out, head popping from Lucifer's rim before he presses back in. Lucifer spreads his legs further. It's so good.
"Most Alphas don't let me top them," Sam tells him. Lucifer tries his best to focus on his words, but Sam barely has to give him time to adjust before he's fucking him. "They know there's a chance I'll knock them up. A small chance, but… no one wants to admit an Omega got them pregnant." He nips the back of Lucifer's neck. Lucifer's cock sways with every thrust. His knot swells without touch, making him more and more desperate for relief. "You want it bad, don't you?"
"Yes," Lucifer begs. He could have pups with Sam. Sam wants to give them to him. Sam's hand dips under Lucifer's belly, rubbing back and forth. He feels so good inside Lucifer. There's no knot to keep him from sinking all the way in, and Sam takes full advantage, dragging his few inches in and out of Lucifer's hole until Lucifer is grasping at the sheets near his head. Sam's own slick makes Lucifer wet and easy, shivering each time the head of Sam's cock slips out of his hole and has to be pushed back in. "Use me," Lucifer demands, "fuck me full, Sam." His cock drips with pre-come, knot nearly popped, and all from being fucked by his Omega.
"Show me you want it. Come on my cock." All Lucifer needs is the order. His knot fattens up as he comes, hanging with nothing to clench around it. It's excruciatingly pleasurable, not a hint of relief as his come spurts into the sheets. Lucifer pants and fucks himself back onto Sam's dick like that'll help, like it doesn't just make him more needy. His knot aches so much.
Sam takes pity on him, wrapping one large hand around Lucifer's swollen knot and giving it a squeeze. Lucifer sighs, going limp under Sam again with only his hands to hold Lucifer's ass up. He keeps Lucifer's hips steady as he milks his cock, mimicking the way he can feel his own hole clenching around nothing. Lucifer's making a mess of their nest, but he whines Sam's name around every squeeze.
"Good boy," Sam praises, "yeah, good for me, earn my pups." He grinds into Lucifer. Lucifer's in Heaven, lazy with orgasmic bliss and full of Sam's cock. He tightens his hole around Sam to hear him curse, grip harsh on Lucifer's hip. He squeezes Lucifer's knot again, milking out another spurt of come that splashes uselessly into the sheets. Lucifer moans, lost to it. His instincts are telling him to bury his knot in Sam before its too late, but his body is telling him to get Sam's cock deeper, make it so that he breeds Lucifer on the first try, as unlikely as that is. Sam's breath is harsh against the back of his neck. He shoves in, hips rolling, and Lucifer's only warning he's about to come is his teeth finally piercing the skin on Lucifer's neck.
Sam's release pulses into him, warm and wet as the slick already coating Lucifer's hole. Lucifer shivers in pure bliss as another wave of orgasm comes from being claimed and bred all at once. He's never felt this good, and he's not sure he could give it up now that he has. Sam doesn't come as much as Lucifer does, and he can't plug him up for long. His dick softens inside Lucifer's hole before finally slipping out with come leaking after it. Sam pushes it back inside Lucifer with his fingers, rubbing it in as deep as he can reach. He's purring again, satisfied Lucifer's his.
Lucifer blinks happily at the pillows around him in the nest. He's soaked in Sam's scent, his neck stinging with a claim, and his belly filled up with his seed. Thoughts of the Apocalypse drift through his mind and are swatted out like annoying gnats buzzing around. Sam's heat is still intoxicatingly strong. They're going to be here a while, and if Lucifer isn't pregnant by the end of it… they'll just have to try harder next time.
Michael knows what he's getting himself into. That's what he tells himself, anyway.
If Dean won't be his vessel, he'll take another one. Adam is young, very freshly presented and even more freshly determined to change that presentation. Michael agrees. Dean will be more receptive to his approach in an Alpha vessel. It takes barely any energy at all to change a few mistakes in Adam's endocrine system. Michael works quickly, and when he's done, he settles himself into his work, inhabits each cell, feels everything his vessel can. He hasn't done that in a very long time, and only with Betas, the occasional older Alpha. Adam's body is-
Michael can handle it.
He will give Dean one more chance to submit to him.
(It shouldn't be that hard. He can barely keep his vessel from filling the air with Alpha pheromones. Dean will be a good Omega and obey, and Michael will finally be at the end of this long war. His vessel's chest aches and its throat tightens up when he thinks about striking Lucifer down, but what choice does he have? He has no other future to turn to.)
He gets about as far as saying, "Dean Winchester-" before his senses overwhelm him and tear his voice away. His skin prickles, his muscles tense, his heart races. Dean isn't even in heat, and yet, he smells that strong? He glares at Michael from across the room, scent soured by anger and fear, and all Michael can do is suck in another breath trying to calm himself down.
"What the hell is wrong with you?" Dean growls, very easily mimicking an Alpha's register, as though he's been practicing that since before he presented. Michael tries to make himself speak. His cheeks flush. Dean growls a second time, wordless and deeper, and it rings confusingly between instincts, to fight off another Alpha (that isn't even there) or to comfort his Omega (who does not want his comfort.) In the end, Michael growls back. His vocal cords are new to producing an Alpha's growl and it doesn't come off as easily as Dean's, cracked slightly at the end. Dean raises an eyebrow and sniffs the air. "Guess that was the least you could do for Adam if you're going to wear him," he says. "Is he still in there with you?"
"No," Michael answers. He listens to how Dean speaks, studying his posture, the way he breathes, the shape of his mouth. When he responds again, "I left him in Heaven. This is between us," his own growl comes more naturally. Michael likes the sound of it. He likes even more the way that the edge of Dean's mouth pulls up hearing it, like he's proud of Michael for getting it right. Dean takes a step closer, and Michael tries to focus. The longer Dean watches him, the less his scent is diluted with fear. The anger remains, held there like a shield in case he needs it.
"I'm not saying yes to you," he tells Michael. "Besides, you've got bigger problems right now."
"What?" Michael can't stop staring at Dean's mouth. His vessel feels hotter than it should.
"Don't you know a rut coming when you feel one?" It's mostly a taunt, but there's a genuine question under there. Of course Michael knows what a rut feels like. He's always shut them out before, but- Dean takes another step closer. "I can smell it. It's strong. Adam's first one, I'm guessing?" Dean's nostrils flare. "Yours, now."
"I'm fine."
"Good to know that's just your angel blade in your pants, then." Michael snaps his gaze down. He's receiving so much sensory information from his vessel that he hadn't even noticed the blood rushing to his cock, but with his attention drawn to it, he grits his teeth against the sudden pressure. No matter how he moves, there's friction, restricting enough to feel painful. Dean laughs at the face he makes. "Yeah, you're really Heaven's most deadly, huh?"
"How do I make it stop?" Michael asks, too overwhelmed to question looking to Dean for advice. Dean's scent isn't helping. If anything, it makes it harder for Michael. He looks at Dean, and his mouth waters, his cock aches, and he feels like he's losing control. Dean's smile comes out vindictive, but then Michael shifts again, whining at the friction, and it softens in pity a little. His brow crinkles. His expression reminds Michael of Gabriel so long ago, plotting mischief. It sets Michael at ease even if Dean doesn't mean to, because while that smile had always spelled trouble, sometimes even a serious dressing down from their Father about recklessness, it was never meant in malice. Dean takes a final step into Michael's space. Michael gasps when Dean puts a hand on his shoulder and melts when he's tugged into Dean. Dean doesn't protest when Michael nuzzles his nose into his neck, smothering himself in his Omega. The anger has been dropped, leaving only an invitation. Without thinking, he rolls his hips into Dean's and feels Dean laugh this time.
"I can think of a few ways," he says.
Michael's only desire is to stay close to Dean, to keep rubbing against him. That's easier said than done when Dean keeps pushing him back for silly things like removing his clothes and trying to get him in a better position. In the end, Dean only satisfies both of them by pinning Michael down. He straddles Michael's head, and Michael leaps at the chance to devour him, pulling him down until his slick drenches Michael's chin. He hears Dean groan as he laps at his hole. Michael's cock demands attention, but Michael's hands are busy holding Dean's thighs and Dean's fingers are already working their way inside Michael. Sometimes, the position he's leaning down in rubs the head of Michael's dick against Dean's chest, but that's all Michael gets, fleeting brushes that make him moan into Dean and drink deeper to try and sate his desire. It doesn't work at all. He only wants more.
Dean shifts up, his small cock dragging along Michael's chin to his lips and thrusting in. Michael lets him, savoring that as much as anything Dean will give to him. He wants to submit to his Omega. He wants to make Dean feel so good, and he can feel Dean's dick throb and his breathing seize in anticipation. Dean drags himself away.
"How am I going to satisfy your rut if I've already come?" Dean says. Michael is just trying to catch his breath. Dean's slick is drying on his chin. Michael peers down his body to see Dean turned around and lining their dicks up, rubbing the short length of his along Michael's until Michael has trouble keeping still and Dean is praising him as he spreads his legs — "be good and maybe you'll get to use your knot later" — and it's glorious when Dean pushes his cock inside Michael, sliding in where only his fingers have touched before. It punches a breath out of Michael. Dean lifts his hips, curling over him as his cock slides as far in as it can. "Too much for you, Alpha?" he teases.
"Perfect," Michael can only say, "you feel perfect." He'd never considered Dean outside of his role as his sword, his vessel, but here, he's giving so many new meanings to being Michael's other half. How can he go back to wanting him in only one way, using him, when he knows that this exists? Dean leans in and kisses him, the first Michael has ever felt, and Michael barely has any idea of how to respond. Dean licks his own taste from Michael's slack mouth. He pulls back, slipping free, and he thrusts against Michael with a chuckle, the head of his cock rubbing Michael's balls, before he reaches down to put himself back in. What starts as another mimicked Alpha growl softens into an Omega's purr as Dean thrusts. Michael responds with his own growl, learned from Dean, and Dean bites him, teeth digging into Michael's chest.
"Don't make fun of me," he says with a harder thrust.
"I'm not. I like it." Dean drops his gaze, teeth scraping down towards his nipple. "I like both," Michael continues, and his reward is Dean's tongue curling lazily around his nipple instead of him biting down on it. Though, Michael's not sure he would oppose that. Dean biting him, Dean claiming him... He moans as his cock rubs against Dean's soft belly. His swelling knot is a distant concern against the pleasure of Dean inside him, stretching his sensitive rim just enough to make Michael's head spin.
"You close?" Dean asks, and Michael has no idea. It's all so good; he's floating in it. Dean wraps a purposeful hand around his cock, sliding down to grip his knot. "I'll pull out," he tells Michael between kisses, "just... another minute, and I'll pull out, let you finish by fucking my thighs." Michael can hear in Dean's voice how much he's enjoying himself, so why would they stop? He pulls Dean down against him.
"Don't," he suggests.
"You sure?" Dean grinds deep as he can, and Michael's eyes slide shut to enjoy it even more. "I'll breed you, Michael. I'll do it. I'll drag you right down out of Heaven to have my pups."
Michael holds onto Dean harder
"Do not pull out of me," he demands now. He shouldn't let Dean- But under it all, Dean sounds so excited, and Michael wants it. The changes he's made to Adam's body did not make it infertile. He could carry as any Alpha could, a more difficult outcome to achieve but still possible. Dean considers it, his breaths puffing against Michael's lips.
"No more Apocalypse."
Michael didn't want one anyway. And here's the excuse he was looking for to forego it.
"No more," he promises. Dean latches onto his neck, sucking where he'd break the skin for a mating bite. Michael arches into him, moving back against Dean's thrusts. It makes them rougher, driving Michael out of his head. His cock throbs and his knot swells, but he only wants Dean to fuck him harder. When his knot finally pops and makes a mess of them both as ropes of come spill onto their stomachs, Dean grunts into his neck, moving for his own pleasure while Michael's steals his ability to think. Dean comes with his teeth finally buried in Michael's neck, claiming his Alpha. He keeps his promise, not pulling out of Michael until he has to. He gets a tired exhale of surprise from Michael as his hole clenches around sudden emptiness, but Dean doesn't leave him alone. Three fingers fill the void left by his cock, fucking Dean's come into him until Michael's sure it'll take.
It isn't until a few weeks later when the Winchesters finally meet up again that they find out they both had the same plan to halt the end of the world. A plan that works very well. Michael catches first and gloats about it, but Lucifer is the one who ends up with twins.