Disclaimer: I only own the plot and my OCs. Anything you recognize as not mine belongs to Marvel Studios, Disney, and/or their otherwise respective owners.

Author's Notes: So originally I was gonna make this part of a series (do not be fooled by the AO3 tags, it is in series, but they are not part of an overarching universe), but I decided for now that I like this just the way it is. Fair warning that Spidey and Wade might seem a little OOC because of this, and there are multiple plot details that are ambiguous. Feel free to interpret them as you like.

Story title comes from the song Burnin' for You by Blue Öyster Cult.

As always, I hope you all enjoy,

~TGWSI/Selene Borealis

P.S.: Oh, also, because I forgot: a theta in my ABO dynamics is somebody who (extremely condensed summary) has both alpha and omega parts. Got it? Good.

~burnin' for you~

Wade was fucking stupid.

Naturally, this probably isn't news to you. It wasn't news to him, either.

But by God did he feel stupider than a lame ass as he crawled into his apartment through the window that opened up onto the fire escape with a groan. His foot caught on the window ledge, which ld to him falling ass-over-kilter onto the (totally not blood-stained) carpet. He barely had the energy to catch himself in time to make sure that he didn't fall on his neck and break it.

...Although, all things considered, breaking his neck probably would've been easier compared to what he was about to go through. If he would have been able to break it had enough to kill himself until his healing factor kicked in, that is.

Oh, well. Too late to try to do it now.

He stared up at the ceiling of his apartment after he'd landed on the floor and rolled over onto his back with a pained whine. He could already feel the sex pollen – yes, sex pollen, you read that right, like he was in a shitty fanfiction and everything. Although, he technically was, wasn't he? – at work. His entire body was feverish, flushed, as it always was during a heat. His lower back, abdomen, and thighs were aching with cramps, and slick was already beginning to gush out of his hole It would only be a matter of time until the brain fog set in, and what would follow next...wouldn't be fun.

Things hardly ever were, when you were him.

This is what I get for doing nice things, he thought to himself. This is why I don't do nice things.

Even as he thought that, however, his mind rebelled against it. He wouldn't do nice things like this for other people, but for Spidey, it would always be worth it.

They'd been patrolling tonight, only the two of them because Red was coming off of one of his ruts, when they'd come across the armored truck full of chemicals being stolen from one of those Stark Industries-wannabe corporations. Oscorp?he thought dazedly.

It was already getting hard for him to think.

Fuck.

Anyways, if you've read this sort of fanfiction before, you probably already know how their attempt to take down the thieves of the armored truck had done. They had been successful in stopping them, be assured of that, but in the process one of those chemical vials or whatever had been primed to go off in Spidey's face, and Wade –

– Wade hadn't been able to allow that.

He'd ran in front of her, and gotten a whiff-full of whatever had been in that vial. He'd known it for what it was immediately, as it had made his brain feel all fuzzy while his heart had started going at a mile per minute –

"Wade?" Spidey had hissed at him. "What did you do?"

"I just saved you from embarrassing yourself," he'd quipped immediately.

When he'd turned around, he'd watched those bug-eyes of hers go wide. She was a genius; unlike the rest of them, she didn't need to put two and two together to get four. "You're not telling me that was – ?"

"Don't worry about it," he'd said, before he'd taken off almost right away, like somebody who was about to go into heat because not even his healing factor could stop something like this once it started.

Like a fucking coward.

In his defense, he'd known what Spidey would have done, if he'd stuck around long enough. She was a complete self-sacrificing dumb ass, so if she'd found out what his heats were like – that unlike most people, sex was kind-of-and-by-that-he-meant-extremely necessary part of his heats, thanks to his mutation – after he'd volunteered himself up for one of them in order to prevent her from possibly suffering from a similar fate, despite being a theta, she probably would've volunteered herself to help him with it.

But he couldn't allow that. Not when Spidey was who she was; she didn't deserve somebody like him.

And moreover, not when she was already bonded.

He'd seen the bite on hr mating gland before, you see. Even though she never spoke of having a mate, and he knew that things were complicated where she was concerned because of magic – did you picture jazz hands as he narrated that? 'Cause he totally did – she had a mate out there, somewhere. The bite wasn't faded, either because of death or a bond broken through other means. She had a mate. She didn't need him.

Then again, nobody did.

Story of his life, right?

With another whine, he set about multitasking before his brain gave out on him completely: as he basically crawled towards his bedroom, he wriggled out of his suit as best as he could. His toys were in his nightstand, he forced himself to remember. All he had to do was climb into his bed and open it up, and grab the first fucking dildo that he could. Maybe find the remote for it, if he could. The dildos that he had were all knotting ones, thankfully. It made his life easier.

A bottle of ibuprofen was also on top of his nightstand, but he was going to be real: he didn't think he had time for that. He definitely didn't have time to get out his heating blanket and save his blankets and mattress from all the slick that he was going to produce over the next several fucking days. He was probably going to have to buy all new shit later. Great.

His suspicions were proven correct. It felt like an eternity had passed by the time that he was about to get up on his bed and one of his dildos – the black glittery one – out along with its remote. He had only just enough time to shove the dildo up his ass without any preparation, causing him to hiss out a "fuck" from the burn and use the remote to turn on its vibrating and inflate its knot –

– And then he knew no more, his eyes rolling up back into his head.

He wasn't sure of how much time passed until he came to. He never was when he was in heat.

It was dark in his room, dark in such a way that it couldn't just be caused by the blackout curtains. So, it had either been a couple of hours or almost twenty-four, and there was no in between. The fact that this was a drug-induced heat meant it could've gone either way.

His hole felt rubbed raw. With a groan, he realized that probably meant he hadn't turned off the vibrator of the dildo for a while.

But because he groaned, he had to inhale, and any attempt that could've been made by him to find the remote of the dildo and turn it off was stopped in its tracks.

He wasn't alone in his apartment.

Hell, he wasn't even alone in his room.

The scent of a theta – an angry theta at that, the simmering quality to the scent making that obvious – was potent, almost as potent as the scent of his heat. He was actually kind of impressed he hadn't attacked the owner of this scent in the sexual way while he'd been out of it; somnic hypersexuality could be a bitch like that.

Still, with a grunt, he shifted around his body as best as he was able to so that he could look at the old, threadbare armchair that was in the right corner of his room, opposite his bed. Without fully being aware of it, he sensed that was where the scent was coming from. The feeling of eyes glaring daggers into the back of his neck helped with that.

"Sp – Spidey?" he breathed.

Sure enough, there she was, and oh, she was pissed. She was sitting with both her arms and her legs crossed. She was still in her suit, so he had a feeling it had only been a couple of hours since he'd been exposed to the pollen rather than an entire day. Her mask was off, though, revealing her curly brown hair, dark brown eyes, and freckle-splattered cheeks. This wasn't the first time he had seen her without the mask, far from it.

She was still the most beautiful person he had ever seen. Practically an angel, in comparison to him.

"You're an idiot," she told him. "You know that, right?"

Perhaps it would've been freaky to most people, that she had busted into his apartment without asking and had apparently been watching him get fucked by a dildo for who knew how long while he'd been out of it. But truthfully, Wade's life had been a shit-show for so long, he hardly even batted an eye at it. He knew that the same was true for her, even without knowing the full picture.

"Get – " he gasped out. The words were hard for him to say with his tongue that tasted like cotton and was proving almost impossible to move. "Get out of here, Spidey."

"Mm, no, I don't think I will," she said. "Considering you just exposed yourself to heat-inducing chemicals for me, someone needs to make sure that you're alright and take care of you."

He felt around his bed for the remote to his dildo; he wasn't going to be able to focus on replying to her between it and the brain fog. When he found the remote – and it didn't take him long, it was practically underneath him – he turned off the dildo completely and let out a sigh. The loss of the knot made his instincts cry out at once, the feeling of being emptyanathema to his very soul.

It gave him the opportunity to focus, though.

He needed to reply to Spidey. Right.

"'Not – not gonna die," Wade gritted out. "Even if I do, I'll just come back. You don't need to worry."

His joke fell flat. "You're enhanced," Spidey stated.

"...So, what?"

"So, I know what that means," she said. "I'm enhanced too, Wade."

...That was true. She was a theta, so she only had heats once a year instead of four times like omegas did unless they were on suppressants, which he was. She would know the complexities that happened for people like them in heats.

But something told him it wasn't just because of that.

That "something" being the mate bite that he could see on her neck, with or without her suit covering it up. It was practically embedded into his brain.

"I don't need your help," he told her. "I'll be fine on my own."

"If this was a regular heat, I'd agree with you," she replied. "But it was induced by chemicals, so we both know it's not."

A growl started up in his chest. "I'll be – "

She cut him off. "Do you want me to call Matt? If you don't want it to be me, I understand. But it's going to be one of us, unless you have somebody else in mind."

...Damn. She simply wasn't going to give up, was she?

"Self-sacrificing dumb ass," as he'd said.

Wade considered his choices. Even in heat, it wouldn't be too hard for him to overcome Spidey and run to one of the places that he had in the city that wasn't his main apartment. She liked to think that she could beat him, and it was true that she was stronger than him, so much stronger than anybody else on the planet besides the Hulk and maybe the Asgardians when she wasn't holding back her strength. But, he had more experience.

He could tell her that he wanted Red instead. The alpha wouldn't hold it against him; he was almost twenty years older than both of them, and it often showed in their patrols. But he would understand why Wade would prefer him over Spidey, probably even more than Spidey would.

...Yet, no. He knew that Red had had a good thing going with Jennifer Walters for a few years now, as good as an open and long-distance relationship could be. Wade wouldn't screw that up for them, as he knew that he would. Somehow.

Granted, that was implying that –

"You don' need me," Wade groaned. "Messin' up shit for you."

Spidey frowned. "How would doing this mess up shit for me?"

"Wi' your mate."

As predicted, this got him the reaction that she wanted. Her face contorted. "Screw you, Wade," she spat, getting to her feet. "Screw you for being so self-centered enough to think that you could mess up my life more than I already have."

All that his brain could focus on was her standing. He thought that he'd gotten what he'd wanted.

But then, she reached her hands up behind her. He heard the sound of a zipper going down. It made him whine again. "What – what are you doing?"

"I told you, it was either me or Matt," she said as her suit, which was basically a giant onesie besides the mask, pooled at her feet. It revealed that she was wearing nothing underneath except for a black matching set of a bra and theta boxers. Her lithe and graceful body was put on display.

It made him want to worship her. It made him want to do so many things that were absolutely ungodly.

"So, since you didn't say you wanted him," she continued, interrupting his train of thought, as hard as it was for him to think too much in the first place. "You're just going to have to deal with me, you arrogant prick."

Anything and everything that he could've said so to this was cut off before he could even move his already-open mouth. She was on his bed before he could really process it, climbing on top of him. Pressing her lips up against his, she kissedhim, and the masochistic and heat-ridden parts of his brain couldn't help but respond.

He allowed her access, allowed her to nibble at his bottom lip and push her tongue inside of his mouth. It wasn't like it was unwanted, as much as he would've rather she not been doing this for her sake, not his.

When she had to come up for air, panting, she grasped the base of his dildo in her right hand. Gently, she pulled it out.

And God, if he had felt empty before, this was several times worse.

He whimpered.

"It's okay," Spidey said. Even in the dark, he could see that her pupils were blown wide, hardly any of her irises showing.

She stuffed three fingers inside of him almost immediately, which helped make it better. Wade groaned, practically seeing stars already as his head fell back onto his pillows. "Spidey..."

Her chest simply hummed with that theta sound that was half-alpha chest rumble, half-omega purring, not really a verbal response. Wriggling those fingers inside of him, she got into position between his legs, spreading them apart with her other hand.

Yeah, okay, so she definitely had experience with male omegas in heats. He didn't know of anyone who would be willing to give him oral while fingering him right off the back otherwise.

Spidey licked at that space between his hole and his dick, his perineum. His nerves ignited under the long, broad strokes of her tongue, sending fire shooting through his veins. When she got to the base of his cocklet, his back arched as she went upwards, up, up, up, until her mouth encapsulated him as she lapped at his slit.

All the while, those fingers inside him just kept on going. They found every single hidden place where it felt the best without even trying.

"Fuck, Spidey," he moaned. "Fuck."

He felt how she smiled around his dick in her mouth.

That was enough to send him over the ledge. His sweet omega cum spilled into her mouth, and she swallowed it without complaint as the slick rained down around her fingers.

She sat up, wiping at the back of her mouth with her free hand. "That was hot," she commented playfully.

He let out a choked laugh. "Oh, you have no idea."

She didn't have to finish her question for him to know what she was asking. "Dear God, yes," Wade said. He was too far gone after that to put up a fight anymore. "Please."

Without taking her fingers out of him, Spidey shucked off her boxers. Her peniform was already hard and leaking: she wrapped a hand around herself, her eyes fluttering briefly. But, though Wade could've watched such a scene while not in heat, he could feel the brain fog trying to claws it way back into the forefront of his mind, and she seemed to sense it as well. Pulling her hand away from herself, she reached it up into her bra, and pulled out a small packet.

A condom.

"You really...think of everything, don't you?" Wade mumbled. She was going to kill him like this, and he couldn't even die.

Spidey gave him a feral grin. "Well, I am my father's daughter, if nothing else."

He wondered what she meant by that.

He resolved himself to ask later, if he remembered.

She opened the packet by using her teeth, careful not to trip the condom itself. Spidey rolled it on, making sure it went all the way past the base of her knot, since the structure of the condom allowed for the swelling. "Tell me when you're ready," she intoned.

Wade rolled his hips. If it was any other time, he would've given some cocky response along with it, being the so-called "merc with a mouth," but currently all he could manage was a, "Ready."

The theta removed her fingers. The loss of them stung, oh hell did it sting, but it was swiftly replaced by her peniform. She went straight to the hilt in one go, her hips colliding with his with such intensity that it shoved him back some. He whimpered again at the feeling, the feeling of being full.

She paused. "Are you – ?"

"You're crazier than I am, and that's...really saying something," Wade declared, before ordering sharply, "Move!"

Chuckling softly, she did as he said.

Her pace was relentless. It was everything that he needed: sharp and brutal, with little care about the impact that it would have on him when his heat was over; they both knew that he would be healed by then, anyways. Her hands roamed as she fucked him: the slick-covered right smearing it all over that side of his body, coating it on his flesh along with the sweat that was already there. The left tweaked his nipples a bit, causing him to gasp.

Her hands both followed the divots and deep grooves in his skin, the mark of his mutation. In this universe, because he was an omega and had manifested his powers young, they thankfully weren't as bad as he knew they were for plenty of his other counterparts. Still, he wasn't exactly the prettiest guy on the block.

He'd never had a proper relationship before, only hookups and people that he trusted enough to spend one of his heats with, like her. But not.

(She was different than everybody else he'd ever fucked, as much as he would try and refuse to admit it.)

Spidey tugged at his hair, getting the last of his slick still on her fingers into it. Pulling his head upwards, she gave him another kiss. This one was messy enough that it made their teeth clack together.

"Ow," he wanted to say.

"Mmph," was what came in its place.

She started to thrust a little bit harder at that, which made things even better. A grunt escaped from her lips. Seeing her enjoy this was even hotter than him actually enjoying it. He felt like that shouldn't even have been impossible.

"Wade," she groaned.

His brain came back online just enough from the needs of his heat being actively satisfied – mostly. He placed his hands on her thighs. Thunder thighs, he thought to himself, almost giddy. This wasn't the first time he'd thought the term in relation to her. But not in a bad way.

Never in a bad way.

"That's it, baby girl," he whispered. "Just like that."

He watched her face scrunch up. "'Told you not to call me that."

She got her revenge. Moving her right hand downwards again, she started to jerk him off. She did it just right, too.

And she knew it. She smirked as she leaned down, getting her mouth right up against his ear. "You like that, baby boy?" she teased.

It was too much.

It was all –

With a cry, he whited out. Everything went hazy as his body shook, overstimulated. He thought he might've heard her make a similar noise. He definitely felt her knot pop, the tie catching at his hole. She rode out her own orgasm, then sagged against him when it was over.

There was silence, as the immediate post-coital was really the only time that he was ever quiet. They both had to catch their breaths, being panting and shivering messes.

Jerkily, Wade started to pet her hair. He thought about doing more than that, and went through the motions of being about to do it.

Right as his fingers were prodding at her entrance, getting coated in her own slick, Spidey shook her head. "No," she murmured. "I'm the one supposed to be taking care of you. 'Not the other way around."

"You deserve it," he tried to argue. Entirely for selfish reasons: he wanted to shove his fingers into her cunt, get a chance to see what it was like.

"No, Wade."

That was a tone that left no room for argument. "Fine, then," he said with a sigh. He went back to petting her hair. "You win for now, Spidey." That wasn't mentioning later. He was sure he could convince her sometime before his heat was over, however long it lasted.

He could feel her shoulders shaking in silent laughter. "Penny," she said.

Wade didn't get it at first. "What?"

"Penny," she told him. "My name is Penny."

Word Count: 3,745