Work Text:
People got the wrong idea.
Nothing was going on with him and Mr. Stark. Just because they stayed late together most nights… That didn't mean anything.
And yet, every morning, Peter could feel his coworkers’ eyes on him, appraising and low key jealous. See, the thing was… Peter was an alpha. That, by itself, didn't mean anything really but the other part to it was that their boss, that Mr. Stark, was one of the most sought out omegas in the country.
Who wouldn't want him?
He was rich and handsome. It was almost blasphemous that he wasn't mated yet. He was snarky and sometimes a bit of an ass, but the man had a heart of gold underneath it all. Peter didn't blame him for keeping all alphas at an arm's length.
All alphas except… Peter.
This thrilled Peter, of course, but it also made him feel so guilty. Because he had looked up to the omega since he was young but Peter had also lusted after him. The young alpha had always thought he'd be an omega just like his idol and Tony Stark had given him hope that omegas could do anything.
So it was a big surprise when he popped a knot. His bedroom walls were plastered with Tony's smirking face as he was captured in typical poses often reserved for alphas, ones that screamed confidence and strength. There were the rare few where he indulged in some requests to appear omegan. None where he bared his neck, he didn't think anyone could convince Tony to do those photos but Peter could still dream. The ones he had were enough anyway. Peter's favorite had been when Tony was looking over a bare shoulder, features outlined in stark contrast by the lighting.
Tony Stark was basically his obsession when he popped his knot and he spent many nights pulling himself off, imagining the omega riding him. The hero-worship had persevered through the years, though the intensity had lessened to a less embarrassing level.
It still didn't stop Peter from stammering and blushing when he was actually around the omega now. So he didn't understand why his boss didn't seem to care that Peter was an alpha.
Then the rumors started. No one ever said anything to Peter's face and no one was stupid to say it in front of their boss. But the whispers were there along with the sneaky glances that watched them when they were anywhere near each other, which was pretty much any time Peter was at work.
He was Tony's assistant, after all. He didn't let it get to him. There was nothing going on, even though he really wished there was.
There were late nights at the office where he and Tony would talk about the tech coming out. Tony didn't consider it work, not when he was passionate about everything that came out of Stark Industries now that it was completely in his hands instead of Obediah Stane.
Peter was just as impassioned as his boss and the more time they spent together, the less things like dynamics, like being omega or alpha, mattered. All that mattered was Tony looking at him, soft brown sparkling with brilliance and grease smudged on his collarbone.
Peter could take all those stupid rumors just so he could be right where he was, sitting across from his mentor and idol.
Sweats and a fitting t-shirt– It wasn't omega at all but it was so very Tony. His boss was hunched over one of the lab tables while a stylus twirled between two fingers.
"What about this configuration?" Tony asked, peering at the schematics one more time.
Peter leaned over his shoulder instead of standing by his side. Compared to the beginning, it had gotten easier to be around the older omega. At least now he can actually focus on the topics Tony threw at him.
"It's really similar to Model SP0618 but then you'll have to upgrade this piece here since–" Peter started to babble when suddenly, there was this scent that made his brain short circuit.
"Kid?" Tony's voice sounded far away but Peter felt warmth spread all along his front.
He was pressed up against the older omega's back and his nose was nestled right against Tony's neck.
"Oh, God," Peter squeaked. "I'm– I'm so sorry!"
That decadent scent was coming from his boss. But it hadn't been there before so why–
"Ah," Tony said as though it wasn't weird at all to have his intern plastered against his back. "Guess it's that time of the year."
That time. There was only one "time" that made sense and Peter's rational voice internally screeched. He needed to leave before he did something terrible. Already, his body was warming up to the fact that Tony was in his arms, so close and yet, not nearly close enough.
He was starting to react. He was starting to get– Hard.
"I should–" Go.
"Stay," Tony interrupted him, commanded him, really. He turned to look at Peter and the young alpha's mouth went dry. There was a look in his eye that belied the relaxed posture of his body.
"Stay?" Peter repeated dumbly. "While you're– you're going into heat?"
The older man tilted his head, considering, before he asked, "You seeing anyone? Omega? Alpha? Beta?"
"What? I'm not but you're my boss…" Peter trailed off. Tony's responding smile stole his ability to speak.
"I won't tell if you won't," Tony winked. Face to face, he carefully slipped his arms around Peter's shoulders and tugged him closer.
"Everyone's already thinking it," Tony murmured, voice low as though they were sharing a well-kept secret. "And I know you probably get some shit over it… So, why not actually do it, hmm? Reap the benefits of sleeping with the boss."
Then he cocked an eyebrow, lips pulling up into a smirk that made Peter's brain blue screen at the sight.
"Unless you don't want me?" Tony dared.
"That's–" Peter couldn't even finish the sentence. The very thought of Peter not wanting Tony was incredulous. His traitorous hands curved down the omega's sides and settled on his hips. Could he really… Could he really touch Tony like this…?
"I'd do anything to be with you, sir," Peter confessed shamelessly. He meant it, too, and judging by the surprised but pleased expression on Tony's face, the omega knew how sincere he was.
"Anything, huh?" Tony said thoughtfully. Then he smiled and it was a wicked sort of grin. "I knew there was something I liked about you."
The omega pressed closer and with him, his scent infiltrated Peter's lungs. His arms slid around Tony's waist and Peter groaned when his hard cock pressed against the older man's thigh.
"Oh," Tony hummed, "Already ready to go, aren't you? God, you're eager, alpha. I like that."
"Mr. Stark…" Peter groaned, pressing even closer. He couldn't believe this was happening… That Tony was going into heat. That he invited Peter to spend it with him.
He needed to kiss him. It was an imperative now, something Peter was helpless to obey. His eyes slid shut as he leaned closer.
But then a finger to his lips stopped him and Peter's eyes opened, confused and maybe a little heartbroken.
"There's maybe… one important thing we need to talk about before we bump uglies," Tony told him.
Oh.
"Oh– Oh, I'm, of course," Peter hastily agreed. He's never spent a heat or rut with anyone so this part is new. It made sense that they needed to talk before rushing things. Peter's face warmed at the fact that he was ready to just jump in.
Well, he did say he'd do anything.
Tony smiled again and that urge to kiss him came back stronger than before. But Peter waited patiently, determined not to be one of those knotheads that couldn't control themselves.
"Well, you see," Tony began, "I'm not like other omegas–" then he chuckled a bit, "well, okay, I am but I, ah… I need more than the usual sex marathon and knotting highs. I need something… more from you."
Hanging on every word, Peter nodded in acknowledgment. He didn't know what Tony had in mind but he heard rumors of the kind of things his boss liked.
Besides making sure that Tony was comfortable, he wanted the older omega to really enjoy himself. He wanted… He wanted Tony to think of him first whenever he wanted a heat partner. He wanted to know everything Tony liked.
"I'll do anything to make your heat bearable," Peter promised sincerely. "What do you need, sir?"
"Well…" Tony kept him waiting in suspense a moment longer before finally saying, "I'd really like to fuck your ass."
Whatever it was that Peter was expecting and his mind had considered a lot of different requests… He still wasn't expecting that.
He was the alpha and Tony, the omega. The way he thought sex would work between them… Well, apparently, he needed to expand his expectations.
Even then, with Tony going into heat, he still had questions.
"Don't you need to be knotted?" Peter said faintly.
"Oh, yeah, there'll be plenty of that," Tony agreed. "But…"
The older man's hands slid down his body which made Peter shiver. Then with a firm touch, Tony squeezed his ass. The alpha inhaled sharply. It didn't feel bad or anything and the idea of Tony finding him desirable by itself was enough to make his head spin.
It was still different but a good different.
"Like a peach…" the omega breathed. "Hope you don't mind… But you got such a nice ass, Pete. Keeps distracting me every time you leave my office. I just wanna get in there and fuck you like– like an omega."
"Oh…" Peter gasped, surprised when Tony's words caused his cock to grow even harder and throb where he was pressed against the omega.
He hadn't previously considered getting fucked, mostly because he was just so fixated on Tony…
"You don't seem too opposed to the idea," Tony observed. He continued to squeeze and play with his handful and Peter was like putty in his hands. The way Tony was touching him sent all sorts of weird feelings shooting through his body.
"I c-could try it," Peter relented, really warming up to the idea. His hips began to twitch forward, his cock seeking friction against the omega's body. "Just… keep touching me, please, sir…"
The omega hummed, pleased. He squeezed down hard enough that Peter's back arched.
"Such a good boy…" Tony murmured and with that, he pulled Peter down into a hungry kiss.
It was like a dream afterward, one that Peter didn't want to ever stop.
Tony led him to his bedroom and their clothes were stripped off. Peter watched eagerly as every inch of the omega's body was revealed.
Tanned skin and a lean but muscled body… Peter felt like he was going crazy just looking at him. There was so much he wanted to do… He wanted to touch every inch of Tony's body, leave his scent on his flesh and his seed in his body… He wanted to tear off the lacy underwear barely covering the omega's cocklet… Wanted to shove it to the side and lick the plump lips of Tony's pussy.
"I feel like I'm going crazy," Peter confessed when Tony settled on his lap.
His hard alpha cock nestled between Tony's cheeks and they both groaned as they started to rub against each other.
"First time sharing a heat?" Tony breathed, nuzzling against Peter's cheek.
"First everything, sir…" Peter's breath hitched as he did what he fantasized about since he was a newly presented alpha.
He slipped a hand between Tony's legs and encountered hard, unyielding flesh. Tony's cocklet… He was touching his mentor's cock.
Peter fondled Tony's cocklet, feeling over and learning the length and girth. It felt hot in his hands and wet with precum that was readily dripping from the slit. It fit perfectly in his hand, not too big, not too small… Just perfect.
His cock was slimmer than an average alpha's brute girth but still big enough that Peter groaned at the thought of having it inside him.
"Oh, fuck…" Tony groaned as he started to thrust into Peter's touch. "Didn't realize I was gonna pop both cherries. Hmm… Lucky me."
"I'm the one that's lucky." Peter didn't know how he was able to string two words together, let alone an entire sentence, but he couldn't let Tony's statement stand. He was the lucky one.
"Too sweet for your own good, kid," Tony teased, the words trailing off into a moan. "Mm– Lower, Pete. You can touch me there. Fuck– Touch my pussy, baby. Feel how, ah– wet you made me..."
Peter wasted no time in obeying. He loved playing with Tony's cock, but touching his pussy…
Tony wasn't lying. His fingers encountered wetness between the omega's legs. Rubbing between Tony's pussy lips, he felt the slick gather and coat his fingers. There was so much of it that it pooled in his palm and dripped off his wrist.
"You're so wet, Mr. Stark…" Peter groaned as he continued to touch and explore.
"Drenched," Tony agreed breathlessly. "Oh, fuck, yeah…"
Peter wanted to be gentle. He didn't want to hurt the older omega but Tony was just so vocal, so responsive that the worry quickly gave way. He wanted Tony to feel good…
At first, he rubbed up and down carefully to measure Tony's reaction. Every time his fingers slipped over Tony's entrance, the omega would jerk and shiver. Then came the moment where Peter slipped a fingertip in.
The tight muscle clenched down hard and the alpha groaned, cock aching hard in envy. Tony was so wet that his finger easily slipped in.
"Another," Tony demanded, riding Peter's finger with seductive rolls of his hips. "Gonna need three, maybe four, for a cock like yours… This big… fucking cock..."
Tony started to return the favor, jerking him off expertly while Peter whined from the stimulation. He managed to slip another finger in, but his eyes drifted shut as he started to lose himself to Tony's touch and the tight heat strangling his fingers.
"Mr. Stark…" Peter moaned, cock drooling precum. "I don't know how long I can hold out…"
"Oh, yeah…" Tony murmured, "Virgin cock… Never been touched by anyone besides your own hand, hmm?"
He didn't know it was possible but a fresh wave of heat flooded his cheeks. He felt like being so inexperienced was a disadvantage but Tony didn't seem to mind. Either way, he gave a shaky nod. He wasn't going to put up pretenses.
"I wanna make it good for you," Peter said softly. "Wanna make you feel good–"
Tony cut off his words with another kiss.
"You will, alpha," Tony pants when they pull apart, "But first, maybe I should take my turn with you. Then you can fuck and knot me… Then while you're recovering, I can fuck your face. What do you think, alpha?"
Peter's inhibitions were out the door.
"How do you want me?" Peter breathed, a little too eager for his own good.
"God, you're perfect," Tony declared before he moved off Peter's lap so he could settle between his legs. "This way, first? Then maybe, second round or third… Wanna fuck you with your ass up."
Tony wanted to fuck him like an omega and Peter was entirely on board with it.
"Okay, sir," Peter obeyed. He followed Tony's urging and allowed his legs to fall open and to him, there was nothing strange about Tony taking his place there.
The older man's eyes devoured him, taking in his flushed face, his peaked nipples, the way his stomach rose and fell as his breathing escalated.
Then Tony palmed his cock, eyes dark as he rubbed his thumb against the leaking slit.
"Can't wait to feel this inside me…" he murmured then slid his hand to the base where the soft bulge of Peter's knot rested. Even just a loose touch to the skin there felt like it was too much.
"D-Don't… You're gonna make me…" Peter bit down on his lip, using the pain to try to distract himself. How embarrassing would've it been if he popped a knot just from Tony touching him?
"Shh, shh," Tony tried to soothe him. "You won't knot yet, baby. I know you won't cause you want that first knot inside me, don't you? Wouldn't wanna waste such a perfect knot by nutting outside, right?"
Peter whined, barely able to contain himself from flipping their roles and burying his cock inside of Tony's body. He had to satisfy the omega first. Give his boss what he wanted. He hooked his arms behind his knees and held himself open to Tony's gaze.
"Mr. Stark…" Peter said desperately, "Please fuck me, sir."
"Oh, baby…" Tony murmured as he reached out and touched Peter's dry hole. "Begging already…? It's like you're the one in heat instead of me…"
The alpha shuddered, body instinctively squeezing against the featherlight touch.
"You have such a cute hole, Peter," Tony observed, eyes riveted on Peter's exposed hoke. "So cute… And tight looking. Pretty and pink."
The omega nudged a fingertip inside and Peter shuddered as it pushed against him. It burned, just a little. The sensation faded shortly after when Tony's finger slipped out.
"Ah, that's right," Tony said, eyes flicking up to meet Peter's. "Alphas don't slick up so gonna have to…"
To Peter, the position he was in felt awkward but he liked it this way. The view was unlike any other. He could see everything that Tony was doing.
Another shudder wracked through his body when Tony reached down, bypassing his stiff cocklet and rubbing between his legs. A moment later and he revealed wet glistening fingers, drenched with omega slick.
"Gotta get you nice and wet for me," Tony explained. "Perks of being 'mega."
Peter was better prepared the next time Tony touched him. Aided with Tony's omega slick, it went a lot smoother too.
"How you feeling, champ?" Tony asked as he worked two fingers inside him.
Peter's hands were curled into fists and his breathing was shallow with concentration.
"It's okay," the alpha tried to say without shaking.
The omega's fingers inside him felt strange and a tiny bit uncomfortable but there wasn't any pain. Just… Tony's fingers pumping in and out gently, stretching him open for his cock.
"Hold up," Tony murmured and shifted closer.
Peter groaned when he felt the older man's cock press against his ass, so warm…
"Nng…!" Shocked and overwhelmed, Peter shouted in pleasure when Tony's fingers touched something inside him.
"There we go…" the alpha barely paid attention to Tony's words. His focus was entirely on the omega's fingers inside him, gently pressing against the sweet spot he didn't know he had.
"O-Oh…" Peter writhed against the sheets, back arching and arms tight against the back of his knees. "Mister… Mister Starrk…!"
"That's it, baby," Tony purred, "that's it, sweetheart. Feels good, doesn't it? Feels good when I touch you right here…?"
Another strangled moan was Peter's answer.
It did feel good. It felt like shocks of pleasure shooting up and down his body. Every rub, every gentle touch against his sweet spot had the young alpha whining and jerking in response.
Wetness spilled out of his slit and traveled down the length of his twitching cock. Through the tiny slits of his eyelids, Peter was relieved to see that he hadn't cum just yet, but it looked like he did. So much precum was leaking out of his cock, dripping in thick rivets and pooling in his belly button.
"Please, Mr. Stark– Please," Peter begged, clenching down on the older man's fingers and conflicted between wanting it to last and wanting it to end.
Tony groaned as though he was in pain. With one last thrust, he then removed his fingers. Peter saw the sloppy way he coated his petite omega cock and the desperate way he aligned himself against Peter's body.
He felt it the moment Tony sank inside him.
"Ahh, fuck, baby…" Tony groaned above him. He looked down at Peter with such an intense look of hunger that the alpha felt he would be devoured right then and there.
It was so hard to keep his grasp on what was happening so Peter… Peter let go. Threw his head back in abandon and reached up to grab the headboard, grip tight and desperate.
Tony's strong hands took over and kept his body nearly in place as he started to fuck him. With harsh jabs of his hips, Tony slipped his cock in and out of Peter's wet hole. His body was so pliant, so inviting… Yielding to the urgent desire that demanded Tony take and take from him…
"So fucking tight…" Tony groaned.
"M-Mr. Stark…!" Peter could only stutter, caught as he was in the heat of their bodies, the hard omega cock loosening his virgin hole.
"So good for me, Pete," Tony praised even as he panted.
The fucking was rushed and desperate, aided on by the heat in the omega's body. Peter couldn't stop the plethora of sounds falling from his lips, whines, moans, grunts, even soft pleading for Tony to fuck him, to take everything he needed from him.
And the omega didn't hold back. He fucked Peter harder and harder until the alpha was breathing ragged and had to use his grip to stop himself from being pushed further up the bed.
It felt like it would last forever… Tony's well known stamina promised that it could if he wanted it to. But he must've taken pity on his inexperienced lover because while Peter was hanging on, trying his best to obey and keep from knotting, Tony shoved in one last time.
With a harsh grunt, Tony came inside him.
"O-Oh…" Peter moaned at the rush of liquid heat inside him. His eyes grew wide with wonder as he watched the euphoria slacken Tony's taut features into one of pleasure.
And when the omega's hips started to jerk, he gave a shocked gasp.
"Ah…" Peter whined, writhing at the unknown sensation.
"My– My knot–" Tony groaned, hips churning and pumping load after load. "S'not normal but f-fuck, feels good when it happens."
Peter's brain felt like mush as he laid there, being knotted by his older omega boss.
When Tony was finally done, he pulled out with a wet sound. Peter's legs fell to the bed and the rush of cum spilled out of his freshly fucked hole.
He looked up at the omega with what was probably a dumbfounded expression but Tony just gave him that wicked smile. He kissed all thoughts out of Peter's head and then climbed into his lap.
His cocklet was wet but soft. There was a soft little bump at the base, similar to that of an alpha's knot but much smaller. It looked small but Peter had definitely felt its presence inside him… He shuddered just thinking about it.
There wasn't much time for thought though, not when Tony took hold of his aching cock and positioned it right at his wet pussy.
Peter groaned, clutching the sheets in white-knuckled fists when his boss swirled his leaking cockhead right against his entrance.
"Round two, alpha," Tony purred before he started to sink down. "Don't worry, kid… I'll take care of this. Just lay there and be a good stud for me, hmm? Already… doing so well…"
An omega's heat was no joke and especially when it was Tony's… His boss wrung every single drop of cum from him, taking knot after knot until it was sore and aching from use.
And when he wasn't buried in the sweet tight grip of Tony's hole, his boss was giving it back to him. Omega slick on his tongue mixed with the bitter taste of alpha seed… A hard cock pumping relentlessly into his ass followed by the inevitable flood of warmth when Tony came…
At the end of it all, it wouldn't be incorrect to say that Mr. Stark's heat took more out of him than it did the omega.
And it didn't matter that everyone knew by the end that Peter was Tony's chosen heat partner. And it didn't even matter that they assumed he had spent the week fucking their boss into the mattress when it was clearly Tony in control.
"You should check in your rut schedule with JARVIS," Tony murmured to him on the last day. He was knotted tightly in the omega's ass, one… two… three loads and counting.
"Yes, sir…" Peter breathed, still floating in the high of his orgasm.
It was worth it. So worth it.
