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Accidental Mate Acquisition

Summary:

Stiles gets annoyed that when the pack ends up in some fight, he's the only walking away with wounds that take forever to heal.

He gets annoyed enough that he bites Derek on the neck, not realizing he accidentally just bonded them.

Whoops?

Notes:

I wrote the thought out on tumblr and now I have it fully hashed out. Yay!

Work Text:

Stiles was embarrassed. 

‘Embarrassed over what’ you ask? 

Well, as per usual when it comes to Beacon Hills, some creature decided it would be a good idea to try and make it their home. And of course, they decided to attack people and make all of their lives living hell until the Hale Pack hunted it down. 

This time, they were up against a group of vampires of all things. They thought Beacon Hills would be a great place to settle down as it had a large enough population to feed from while still being able to hide in the warehouse district. 

The pack had managed to chase them into the preserve, peace talks having not worked, and fought them. The battle this time was pretty rough, vampires were conniving and agile. A little more dangerous than their usual enemies. 

Every werewolf had been scratched or bitten multiple times. Lydia and Allison as always managed to be graceful and not get hurt, which was great for them. Really. But Stiles? He was bit, scratched, and kicked into a tree at one point. His right leg was hard to stand on once everything was over. 

Meaning, by the end of the fight, he was the only one injured. Again. Stupid werewolves and their healing abilities, making him feel like he was the only one to get hurt in the end. He was pouting, keeping the weight off his right food as he watched the werewolves deal with the bodies after the fight. Lydia and Allison beside him. 

“I think your blood drew them in,” Lydia murmured thoughtfully. “It’s why they went after you so much.”

“It was weird,” Allison chimed in. “I have this scratch on my wrist from earlier and they should have smelled that and attacked me. But they targeted you instead.” 

“Just my luck,” Stiles scoffed, arms crossed. 

“Can you walk?” Derek asked, moving to stand in front of him after making sure Peter would be able to handle the rest. 

“No.” He grumbled. 

Derek nodded, moving closer before gently picking Stiles up. Which, way to make him more embarrassed, and definitely slightly turned on, carrying him like some swooning damsel. He was still pouting, arms crossed as Derek carried him back to the cars. Looking around, Stiles noticed the other werewolves all walking along leisurely, talking amongst one another and seeming to be winding down after the fight. 

It irks him. 

Like, what the hell? Why do they get to keep walking away scot-free while he has to suffer injuries? Especially when he was trying really hard to stay out of the fight this time! He was definitely Team Jacob and did not want to be anywhere near blood suckers. Might be because he doesn’t like the sight of blood on a good day. 

He looks at Derek now, the alpha carrying him easily, clothes slightly torn in spots. A small smattering of blood here and there. Exac5ly where Stiles knows he was scratched because he saw it happen. It pisses him off. 

He shifts in Derek’s arms a bit, moving up higher so his face is inline with the werewol's neck better. Derek easily shifts him around, allowing it, like it’s nothing. Fuck this, he shouldn’t get away with no scars or anything. With a twitch of his eyebrow, Stiles leans in and chomps right down on the alpha’s neck, kind of shocked he managed to break skin on the first try.  

He’s too busy staring right at it, waiting for it to disappear to realize that Derek came to an abrupt halt. 

The longer he looks, he realizes the mark isn’t going away. If anything, it does heal, but it forms a scar and stays. He stares in shock, then finally takes in the silent preserve. 

“Oh my god, Stiles, did you seriously just bite him?” Scott sounds exasperated. 

“Just cause you’re upset doesn't mean you need to take it out of poor Derek.” Erica teases. 

All of them start joking around, but Stiles says nothing. Finally, he hears Peter burst out laughing. He looks over to the older man holding onto a tree for support as he doubles over in laughter. He slowly looks back, now hesitantly staring up at Derek’s face. He looks shell shocked, staring straight ahead. What clicks in place though is the faint blush on his cheeks and ears. 

Stiles, feeling chastised somehow, clears his throat. Derek’s eyes snap to him, eyes widening as he tilts his head to the side. 

“So, that was kinda a dick move. You can get even if you want?” He says hesitantly. 

Derek stares for a moment before he pulls Stiles up and bends down, biting right down on his neck as well. He feels a weird jolt of heat go through his body, shivering. Why the hell did that feel so good? Wasn’t that how the vampire bite was supposed to feel? Like pure ecstasy going through his veins? How come that's what happened with Derek.

Peter starts laughing even harder in the background, Derek growling a bit as he pulls back. Stiles flushes at the satisfied look on Derek’s face as he starts walking again. He keeps his eyes down now, letting Derek manhandle him into the camaro, having been brought to the fight for once and not forced to drive. 

When Derek brought him home, he helped Stiles clean his wounds, leaving the bite mark on his neck for last. When it was time to clean it, Derek looked proud of it. Making Stiles pout a bit. Yeah, okay. He was a dick and bit not only a werewolf, but an alpha. But he didn’t have to look so proud at getting even.

He then panics, finally realizing that he just told a werewolf to bite him and that he would definitely turn, or worse, die. But Derek reassures him easily, telling him that neither would work on him. 

He wants to question it more, but gets distracted by Derek gently cleaning it, fingers gently tracing over it. With that done, he helped Stiles get in his pajamas before finally leaving. That was the end of it, right?

 

Wrong. It had been a week since Stiles was dumb. The other scratches and bites were healing well, closed up and scabbed over. Well on their way to either scaring or going away. 

Except the bite mark Derek left. 

It was weird how quickly it healed. It didn’t even scab over. Stiles had woken up the next morning and there was already a red scar on his neck. It looked a bit like a tattoo on his skin. He panicked at first, thinking maybe he had been turned into a werewolf and that Derek was wrong. But that was a dumb thought, if he was a werewolf he wouldn’t have still been injured. 

He gave it a day, thinking maybe he was just a late bloomer, but nope. He was still very much human. So he shrugged it off. 

Then he noticed that weirdly enough, the marks from the vampires were actually healing quicker than normal. Yeah, a week later he expected to be on his way to healing, but the particularly deep one on his thigh that probably should have had stitches was just a light one, a small scab over it in the final stages of healing. 

What the hell was going on? Was he something weird like Lydia? He knew Deaton said he had a spark in him, was he actually not human?

And why the hell did he feel like he was going through Derek withdrawals?

After day two of not seeing Derek, he kept looking to his window, looking around the street as he went out, peeking around the betas wondering where the alpha was. But nothing. 

On day four, he was getting twitchy, phone in his hand, debating on calling him or texting him. He always wanted to talk to Derek before, but now it was somehow worse. 

On day seven, he was pacing around his room, unable to sit still. He wanted to find Derek and crawl into his arms and never let go. Yet again, nothing really new because he was hopelessly in love with the alpha, but it was worse than usual. Usually he could distract himself by reading or playing games, but he couldn’t this time. 

That’s how Peter found him, climbing in through his bedroom window and staring at him as he muttered and paced around his room. 

“Hello, Stiles.” Peter smirked. 

“Hi, creeper.” He waved dazedly, still pacing. 

“Alright, enough of that.” Peter moved, standing in his way and grabbing his shoulders, pulling him to a stop. Stiles’ eyes shot up, his body still feeling unsettled, but weirdly a little better. 

One moment, he had caught some scent off him, then the next he was face first into Peter's shoulder, chasing it. Peter crooned, reaching up to pet the top of his head. 

“Oh, you poor thing. It’s really strong, isn’t it?” 

“What is?” Was Stiles’ muffled reply, face smushed in his shoulder as he chased the scent. What the hell was wrong with him. 

“The pull,” Peter simply said. “You should go see Derek.” 

“What? Why?” But the thought of going to see Derek was alluring. God he wanted to see the alpha- no his alpha really badly. 

“Because he is feeling just like you are and he will not shut up.” The beta kept soothing Stiles, actually looking at him softly. That was weird. Why was Peter being all nice to him?

“Stiles, I know the pull is taking over your mind, but think for a second. You bit Derek, and Derek bit you.” Peter said slowly. “You bit each other's necks. You didn’t turn.” 

Stiles pulled away, giving him a confused look. Peter just smiled patiently, waiting for Stiles’ brain to boot back online and think properly for the first time in a week. When he finally did, it clicked in place, making him scowl. 

“I’m going to kill him.” Stiles seethed, pulling away from the beta, turning to grab a bag and shove some clothes and his laptop in it. He strode out of his room and to the bathroom, grabbing his toothbrush as well. “Tell the betas no one is to go to the loft until they get the say so!” 

“Can do,” Peter chuckled, watching him come back into the room to grab his keys. “Good luck and let me know if I need to hide a body.” 

“The only body you’ll be hiding is whoever gets in my way of going to Derek.” He grabs his shoes and heads downstairs, Peter trailing along behind him. 

“I’ll go make sure the coast is clear then.” He smirked, patting Stiles on the head as he took off. 

Stiles let himself take as much time as he physically could getting to the loft, wanting to give Peter whatever time he needed to clear others out. But he needed to get to Derek. 

Once he pulled up, he grabbed his bag and made his way up, nodding to Peter who was shoving Isaac out of the building as he passed.The other beta looked very confused and a little terrified at Peter taking him somewhere, but he didn’t have time to stop and soothe the beta. He had an alpha to get to.

Once he opens the door to the loft, he finds a confused Derek standing by the couch. “Stiles? What’s-”

Stiles dropped his bag as he approached, grabbing a pillow off the couch before smacking the alpha with it. 

“Hey!” Derek tried to take a step back, but his knees hit the couch and he flopped onto it. In one, surprisingly, fluid motion Stiles dropped the pillow, climbed into the alpha’s lap, and brought him into a kiss.

With zero hesitation, Derek wrapped his arms around him, one hand sliding up to the back of his neck and one finding a place on his lower back. They sat there, making out on the couch for who knows how long before Stiles pulled back, mostly to breath. He rested his forehead on the Alpha’s below him before he pinched said alpha. 

“Ouch, hey!” Derek grabbed his arm, pulling it away from his neck. “Would you stop?”

“You’re an idiot. Why didn’t you tell me we are mated?” Stiles pouted a bit. 

Derek looked away sheepishly for a moment. “I was kind of shocked that it snapped into place when you bit me. Then you asked me to bite you back and I just didn’t know what to say.” 

“Here’s a good idea,” Stiles sat back, reaching out and pinching Derek’s nose, his hand getting swatted away instantly. “How about you just tell me.” 

Derek huffs, rolling his eyes. “I’m more surprised that you managed to give me a mating bite with intention behind it, all without knowing what you were doing.” 

“Oh, please.” Stiles waved it off. “That’s the least shocking part. I have been obsessed with you since you told Scott and I it was private property.” 

Derek stared at him, flabbergasted. “That long?”

“I mean, I might have not known what it was right at that moment, but the pool? I knew I would literally do anything to keep you alive. Even if it meant fighting Jackzilla.” He paused. “Though I will admit, I would have lost, but it’s the thought that counts.” 

“Now,” Stiles gave him a smug look. “How long for you, Mr. You–Also-Bit-With-Intent?” 

Derek sighed, dropping his head back on the couch. His expression looked like a man who was about to reveal his deepest, darkest secret and as annoying as that was, he also loved him for it cause it was hilarious. 

“Which time? The one where I realized you were my mate? Of the time I knew I was in love with you?” Derek finally said.

“Oh my god,” Stiles whispered, then bounced in glee a bit. “Both!” 

“The station for mate,” Derek grumbled, stilling Stiles by grabbing his hips. “Jennifer.” 

“Wait, hold on. Couple questions. You knew I was your mate when we snuck into the police station?” Stiles tilted his head. “How?” 

“No, not then.” Derek shook his head, looking awkward. “Earlier.”

“Uh, dude. I don’t think we went to the station earlier.” Stiles pursed his lips in thought, trying really hard not to think back. 

“Do you know why peanut butter cups are my favourite candy?” Derek asked suddenly, jolting Stiles out of his thoughts. 

“Uh, because they’re not overly sweet?” Stiles guesses. 

“No,” Derek shook his head a bit, voice practically dropping to a whisper. “Because on the worst day of my life, my mate sat beside me, held my hand, and offered me a Reese's peanut butter cup.”

“Laura was off talking to some cops while I was told to sit and wait. But up came this little ball of sunshine, a kid who was chattering away a few minutes before, and he took one look at me and just silently sat at my side so I wasn’t alone.” Derek said reverently, a smile, wistful smile on his face. 

“I knew by scent he was my mate, but we were so young and I had not only lost almost my entire family, but had two very horrible relationships back to back. So I did nothing, just knew that you were out there.” 

Stiles was in tears by the end of it, Derek reaching up to wipe them away gently with his thumb, looking at him like he was the world. With a sniffle, he opens his mouth again. “And when you knew you loved me? Why Jennifer?” 

“Because,” Derek took a deep breath. “When you asked her where your dad was, and it was between trusting you or her, I knew I would do anything to for you. No one else would ever matter as much as you do.” Derek gave a short laugh. “Just sucked a bit you were still under 18. I wanted to wait awhile, give you time to not only be of age, but grow a bit.”

“But of course, nothing is how I planned with you.” Derek gave him a mock glare. “You were supposed to go away for college, let me court you properly next summer when you return.”

“Not now, before you even left.” Derek teases him lightly. 

“You sap,” Stiles sniffles. Derek just chuckles, bringing his head down so he can kiss him on the forehead. Stiles tilts his head a bit, grinning when Derek leans in and nuzzles into his neck. After a moment he drags his teeth over the mating bite, reducing Stiles to a puddle in his lap. 

“So does this mean we’re married now?” Stiles asked. 

“Pretty much.” Derek nipped lightly at his neck. 

“Thank god, I needed a tax break.” Derek paused, then started laughing, pulling back to give Stiles a fond look. 

“If I get you a tax break, does this mean I get a get out of jail free card with your dad?” Derek asked, leaning back into the couch again. 

“Yeah, good luck with that. I never got one and I have been locked up in a cell at least 7 times.” Stiles grinned. “But I can offer some services that involve my mouth.”

“Oh?” Derek smirked, raising an eyebrow. 

“Yeah,” He dropped his voice, leaning in to trail his lips along Derek’s ear. “I’m a great conversation partner.” 

With that, he got up and went over to the kitchen, leaving Derek behind on the couch. “I’m hungry! Whatcha got?” 

A second later, an arm wraps around his waist and hoists him up and over his shoulder. He laughs, trying to wiggle out of the hold, but Derek keeps him still as he goes over to the door and slides his shoes on. 

“Come on, Isaac ate the last of our bread. I need groceries.” Derek didn't put him down until they got to the car, placing him right in the passenger seat. 

“Can we get Reese's?” Stiles looks up at him. 

Derek gives him the softest look, leaning down to steal a kiss. “Yeah, we can definitely get some.”