4.

And so it went. The cycle continued. Bucky woke up, horny and burning. He wore himself out on Sam's disco stick. He went back to sleep. Somewhere in between, the Alpha made sure his Omega was watered and fed. He cradled Bucky against him as he held a bottle to his lips. Sam hand fed his mate cheese and crackers. He even tried to clean Bucky up a little with a damp washcloth. The Omega kicked up a fuss, complaining that Sam was washing away their scent. To which Sam reminded him that there was a difference between an aromatic musk and smelling like the bottom of a gym bag.

As one day passed into the next, and then into the next, the interim between frenzied mating grew longer. It stretched from about forty-five minutes to almost an hour and a half. On a few occasions, Sam made it almost three hours before being accosted. Not that he really minded, but his dick was not battery operated. Bucky kept on fighting sleep. Whenever he managed to avoid unconciousness, he would simply lie there, nestled amongst the pillows and blankets of the nest. Content and satiated for the time being. In those moments he was free of the ache and most like his normal self. Though he was known to whine whenever Sam stepped away from the nest. Even though he knew that the Alpha would return.

It got to the point that Sam had to give the Omega a mantra to recite every time he stepped out of Bucky's sight. Of course, the jerkface swore up and down that he didn't need some stupid saying to get him through only a few minutes of Sam's absence. In fact, he encouraged Sam to take his time. No need to rush back on Bucky's account.

So Sam took him at his word. On his next foray to the kitchen, to whip up a quick lunch of chicken noodle soup, Sam lingered a bit. He searched through the cabinets for a bowl big enough for them to share. It wasn't that he didn't trust Bucky to not spill soup all over himself or the nest. Sam liked feeding him. Plain and simple. He liked being needed. Especially by someone who, up until a few weeks ago, liked to act like he didn't need anybody. So the Alpha would happily hold his mate close while he spooned soup into that sassy mouth.

Upon his return, his ears must have been deceiving him. And his eyes as well.

"Sam will always find me. Sam will always come back. Sam will always find me. Sam will always come back." Bucky laid clutching that damn octopus to his chest, his eyes closed, chanting lowly. The words offered him a modicum of relief while Alpha was elsewhere.

Sam chose to keep the I told you so to himself. Though his self-satisfied smile surely spoke volumes. Carefully, he climbed back into the nest. He presented the bowl of soup to Bucky, who graciously allowed himself to be fed. Sam made sure his Omega ate more than half the bowl. His Heat had taken a lot out of Bucky. Even super soldiers needed to recharge. The Alpha praised every mouthful his mate got down. Of course, he got groused at the whole time. Bucky wasn't used to being coddled. Though he accepted the coddling from Sam nonetheless.

Once, at around three in the morning, when Bucky had yet again awoken seeking satisfaction, he apologized for dragging Sam into this. He knew Sam was busy. Sam was a good man. Always helping people. And yet Bucky was selfishly taking up his time. There was something about Bucky not thinking he was worth even a second of Sam's time that unlocked a protectiveness in the Alpha that had laid dormant. He silenced his Omega's mouth with a searing kiss. He pressed Bucky down into the bed and slid inside him. Sam sucked bruises onto his neck as he fucked into his mate. Showing Bucky just how incredibly worthy he truly was.

One of these days, that man would learn that he deserved nice things.

Like bubble baths, for instance.

Sam took it upon himself to bathe Bucky. He got grumbled at for that, too, but Sam refused to let a little disgruntlement deter him. Bucky didn't have any bubbles to add to the bath, but they made do without. The Alpha stood outside the tub as he cleansed his mate of three days and nights worth of coupling. Sweat and dried cum and God knew what all else. Sam made his Omega squeaky clean.

He even washed Bucky's hair.

"You know you don't have to do this."

Sam gently massaged the shampoo into Bucky's scalp. It was good stuff. Smelled nice. Foamed up easy. Sam refrained from fashioning Bucky's hair into a mohawk. "Say that one more time and I'll drown you."

The sun was rising on Day Four. While the Omega's Heat was not completely over, it had dissipated significantly. Bucky spent more time lucid than not. Meaning the smart-assery had returned.

Though there were also moments of quiet self reflection. It took setting aside a fair bit of pride for a guy like Bucky Barnes to ask for help. Especially for so… intimate of a situation.

How did one casually ask a dude to fuck him for four days straight?

With so much time spent in such close quarters, the two had learned a lot about each other. As well as themselves. Sam, for instance, really didn't mind getting woken up with a blowjob. And Bucky was actually capable of purring. Would wonders never cease?

The Omega tilted his head back so Sam could rinse out the shampoo. "Were you serious about the things you said? Ya know… The baby making stuff? With me, I mean?"

"Yes," said Sam. No hesitation."I love my nephews but I've always wanted kids of my own."

"With me?" Bucky repeated. "Not sure if you've noticed but… I've got some baggage."

The Alpha snorted. "You mean those skinny jeans I found shoved to the back of your closet? Don't worry, man. Your secret is safe with me."

Bucky flicked soap suds into Sam's face. "First of all, low blow snooping through a man's closet when he's passed out. Second, ignoring the fact that I am only recently marginally mentally stable… I don't even know if I can have kids. All that freezing and thawing Hydra did to me… Not so great for the ole reproductive system. Another reason why this Heat business caught me so off guard. I got checked out in Wakanda but… While, it's not impossible…" He glanced over his shoulder at Sam. "I'm just saying… I wouldn't blame you for changing your mind and picking some other Omega to make a family with. Hell, Torres has been in love with you since you first said hello to him."

If the Alpha had wanted Torres, he would have fucked and bitten Torres. Or any number of other available Omegas. Yet it was this absolute pain the ass that had somehow stolen Sam's heart.

"Sometimes," said Sam, "when I'm so tired that even my eyebrows hurt to move… I get to thinking… What would life be like if I had just slept in that morning? What if, instead of running into Steve Rogers, I had just… I dunno… Gone for a donut instead?" He rubbed conditioner into Bucky's hair. It was minty. A refreshing scent. "Never woulda got caught up in his mess. Sure as shit never woulda got a goddamn steering wheel ripped out of my hands."

The Omega mumbled a soft sorry.

"Almost crapped my pants, Buck."

"Alright, dude! I said I'm sorry!"

He splashed water at Sam. Sam splashed him back. Before long what was supposed to be a relaxing bath turned into a water fight. Because these were two grown men with all the maturity of a pair of fifth graders.

The fight ended in a draw. Neither man was the victor and they were both soaking wet. Sam helped Bucky out of the tub.

"If I let you break your neck, AJ and Cass will never forgive me." Sam grabbed a fresh towel and started drying them both off. "For reasons that escape me, they actually like your dumb ass."

Bucky graced him with a cheek grin. "You like my dumb ass, too."

For that, the Omega gave that ass a good, hearty smack. His hand hit that butt cheek with a force that sounded like a thunderclap. Sam expected Bucky to turn on him with some quick witted retort about Sam at least buying him dinner first. Or something about a safe word. What Sam got from him was a deep, guttural moan that seemed to emanate from the depths of Bucky's soul. The sound went straight to the Alpha's dick.

When Bucky looked at him, it was with a yearning that need not be named. The Heat-struck Omega drifted into Sam's arms. Drawn to his Alpha like a moth to a flame.

"For fuck's sake…" Bucky pressed himself against Sam. He all but humped Sam's sweatpant-covered leg. "I thought I was done with this shit." The Omega really wasn't a fan of having his free will overridden. Even by his own biology.

Sam trailed his fingers down Bucky's back. The skin was still damp. He delved down into the crack of his Omega's ass. There, as he pressed his middle finger against that puckered hole, Sam found a wetness that had nothing to do with bath water.

His mate sighed his name like a prayer. Though Bucky winced when that finger breached him.

"Sore?" asked Sam, with a note of concern.

Bucky nodded, breathing hotly against his neck. "A little. But it's not bad. I still want it." He nipped at Sam's earlobe. "Stop worrying. I swear, my grandmother never worried over me this much."

"Please don't invoke your dead grandmother when I've got my hands on your bare ass."

The Omega huffed a laugh. "What, that doesn't turn you on? You know, you'd be surprised by the kind of stuff I've found on the internet. There's this thing called granny porn. And seeing how I'm technically over a hundred - oh, god!"

Two fingers stuffed into his aching hole, mercilessly stretching him open, almost brought Bucky to his knees. Sam made sure to curve his fingers just right, to rub at the Omega's prostate. The metal hand on his shoulder hung on for dear life.

"You wanna come on my knot or you wanna keep talking shit? Because I am not above carrying you to the bedroom like Rhett did Scarlett."

It took several seconds and a few deep breaths for Bucky to steady himself. Sam's fingers were still in his ass. Teasing and tormenting.

"I need you to fuck me like you hate me."

Back in the bedroom, Bucky scrambled into the nest. The whole thing could do with a good washing. Or, at the very least, a liberal dousing of Febreeze.

The Omega assumed the position.

Damn, that was a nice ass! Round and firm and capable of taking a real pounding. Ten out of ten.

His mate glared back at him. "You taking pictures back there or something? Come on!"

Sam took off his sweatpants and climbed onto the bed. "Funny you should mention pictures…"

Patience was not one of Bucky Barnes' virtues. The guy started arguments for kicks. He was as hard headed as the day was long and had never met a bad idea he didn't like enough to lasso Sam into. If only he weren't so brave and so loyal and so much fun to fight with. And fight beside. Bucky always had Sam's back. He also had the kind of butt that should've come with a warning label.

For now, Sam skipped over that fabulous ass. There was plenty of hate fucking in their future. Along with some holy shit, you almost died fucking. He pulled rank as the Alpha. Sam would give his mate the sweet loving he deserved and the jackass was going to like it.

Feather soft kisses across Bucky's shoulders. Little pecks up the side of his neck. Sam did a thing with a tongue in his Omega's ear that clearly made Bucky's brain do a hard reboot. He loved the way Bucky squirmed and whimpered at all this tender treatment. As though Sam hadn't wrecked him repeatedly these last three days.

"You know I'm gonna have you any way I want? You get that, right?" His teeth worried the shell of Bucky's ear. "You picked me, baby. And I am going to keep you..." His fingers found the Omega's nipple and pinched. "And love you…" He rutted his cock between those fine ass cheeks. "For the rest of your life. You're welcome."

Sam positioned his mate to his liking. He gathered placed pillows under Bucky's head and hips so that the Omega could lie comfortably while Sam worshipped him. Bucky hummed in contentment as Sam left a trail of kisses down his back. He was purring by the time the Alpha reached the base of his spine. This was, perhaps, the most relaxed he had been in recent memory. He squirmed as Sam took tiny nips at his butt cheek.

"Gonna eat that ass, James."

The Omega let out the most debauched moan. Muffled slightly by the pillows, the sound still carried to Sam's ears and burned into his brain.

A promise made was a promise kept.

Sam spread those perfect cheeks. He looked down at that hole. How many loads had he let loose inside him? How many times had Sam felt that heavenly squeeze around his dick as Bucky came for him? Too many to count. He was halfway in love with that sweet little hole. Clearly, his Omega had more to offer that good ass. But good ass should never go unappreciated.

He went in for a taste. All it took was one long lick across his hole for Bucky to start begging again. Such a greedy, needy little bitch. Moaning for more. He tried pushing back onto Sam's tongue, but the Alpha held him firmly in place. Despite his best efforts, Bucky was not in charge of this rodeo. He knew Sam would take care of him and make him feel so good. But now that he had regained most of his faculties, he was reluctant to relinquish even a little bit of control.

"I got you, baby. Just trust me."

Fingers replaced tongue. Pressing deep and searching out that sweet spot that made Bucky's toes curl.

"Jesus fuck!"

Found it.

"God, Sam… Please, Sam…" Bucky clawed at the sheets, gasping as his Alpha's magical fingers had him unraveling. "I'll do anything, I'll be so good for you, let you fuck me anyway you want, just please!"

Well… The man said please… Twice, in fact.

"Oh, I was gonna fuck you any way I wanted regardless." Sam sucked the slick off his fingers. His own face was practically covered in it. He went back for another quick tonguing. Maybe it was the pheromones, but Bucky tasted so damn good. Sam could eat that ass for breakfast. "You'll be wanting to marry me by the time I'm done."

He rearranged the pillows again before maneuvering Bucky onto his side. Sam moved in behind him, his chest to the Omega's back. He rested the head of his cock against Bucky's hole and just pressed forward. Sinking into that just-right tightness. Bucky opened up for him, so accustomed to the thickness of his Alpha's dick that Sam met little resistance. With one arm across Bucky's shoulders and the other securely around his waist, Sam laid still. His whimpering Omega hooked a leg behind Sam's thighs, driving him even deeper. Desperate to feel every inch his Alpha had to give. Again, Bucky tried to take the reins by rolling and rocking his hips.

"Sam…"

"I'm right here, baby." He kissed his Omega's ear, suckling at his earlobe. "Can't you feel me?"

He began fucking into him in earnest. Sam praised his darling mate with each breathtaking thrust. Bucky was so good. So clever. Just look at this perfect nest he had made for them. And he was so right to call Sam to take care of him. This was all so new and scary, but Bucky was so brave. He had let Sam in and now he was going to get everything he deserved. A loving Alpha to look after him.

"So perfect," sighed Sam. His mouth found his mate's neck again. His lips moved against the skin of Bucky's throat. His tongue tasted the salt of the sweat that lingered there. "How did I get so lucky?"

Because, honestly, Sam could not have picked a better partner. Bucky got him in a way that not a whole lot of others did. Not even his own sister. Most astounding of all, he understood that Sam needed to be needed. Maybe it was a part of some supposed hero complex. That Sam saw himself as the fixer of broken things. And Bucky had been broken. But he was mending himself. In his hour of need and at his most vulnerable, he had turned to Sam. He knew that Sam would never hurt him, never take advantage of him or betray that sacred trust that his darling Omega had gifted to him. That was just the kind of man Sam Wilson was.

Bucky moved Sam's hand down to his dick. "Touch me."

No further instruction necessary.

Jacking off the former Winter Soldier while fucking him in the ass had to be breaking some kind of law. The sounds Bucky made were absolutely filthy. And the way the Omega begged for Sam to fuck him deeper, to fuck him harder, that he wasn't made of glass, that he could take it. Yeah, Sam was definitely contributing to the delinquency of an elderly person.

"Gonna come for you," he murmured, gasping, reaching back for Sam. It was all too much, too good. Rapturous pleasure blazing across their bond like a shooting star. They were joined in body and in soul. So intimately entwined that it was almost impossible to tell where one ended and the other began. "Don't stop, don't stop, oh god, please, I love you, don't stop…"

Aliens could have been invading the planet, yet again, and there was no way in Hell that Sam was gonna stop.

"That's it, James, come on…" The Alpha coaxed his mate through yet another earth shattering orgasm. The neighbors were so gonna tape a nasty note to Bucky's door. "Come on my dick, baby… Look how good you are… My Omega… Mine."

Bucky moaned for him. Moaned for the knot that was stretching his hole and seed that would soon fill him. "Yes, Alpha, please, come in me, fuck, Sam, please…"

There was something about an Omega - specifically this Omega - begging for his cum that set Sam off. Driving himself deep into that perfect fucking ass, he gave Bucky what he wanted. His cock twitching in that wet hole. And like a good Omega, Bucky took it all. Mewling softly as Sam's spunk painted his walls. His quivering tunnel milking the Alpha of every drop.

With as many loads as Sam pumped into him, the odds had to be in their favor. He rubbed his Omega's belly, imagining how round it would become with the life growing inside.

Back to his smart ass self, Bucky remarked, "If you knock me up, I expect you to make an honest man out of me."

Don't threaten Sam with a good time.

The Alpha grabbed the nearest pillow and placed it under Bucky's head. He did his best to make his mate comfortable while they waited for his knot to go down. "We'll have an October wedding. Neither of us can wear white, though. Since we're obviously sluts."

"Please don't make me laugh with your knot in me. It feels weird."

Sam could only stare at the back of his head. "Oh, so now you tell me it feels weird having my dick in your ass?!"

Bucky chuckled, then groaned. "I hate you so goddamn much, Wilson."

Yeah, yeah. Whatever lies the Omega had to tell himself to help him sleep at night.

"Hey, Buck?"

"Hmmm?" He was starting to doze again.

"Why'd you name the octopus Fred?"

The Omega shifted, causing Sam to nearly bite his tongue off. He yawned. "Because Red Wing was already taken."

Asshole. Sam loved him anyway.

End.