A/N: I know this is a fast update, but I don't know how fast the next update will come. I already had these two chapters written so that's why I'm updating this thing again. We'll just have to see.

"You look way more sober than you should," Malia said to Stiles as she plopped down on the couch beside him, a half-empty beer in her hand. "Why are you sitting here, anyway? I figured you'd be up, trying to arrange a booty call for the night."

Stiles laughed at Malia's comment. Whenever she was close to getting drunk, her mouth ran away from her, and he still thought that it was one of the most adorable things about her. They'd had a thing – fooling around whenever they were bored – for a while, but once she started dating Kira, he had stepped back. They still remained pretty close friends, though.

Stiles shrugged. "I don't know, Mia," he said, using her childhood nickname. "Nobody here is really catching my eye tonight."

"Good," Laura said from behind them, startling Stiles and making him jump. He hadn't even realized she was back there until she spoke.

"Goddamn it, Laura, make some fucking noise or something!" Stiles exclaimed, whipping his head around to look over his shoulder. "You scared the shit out of me!"

"Sorry," Laura said casually. "But if nobody's really caught your eye, then you need to go get Derek. Drag my brother out of his room physically if you have to, but he promised he'd make an appearance.

"Laura, your brother is, like, two hundred pounds of pure muscle," Stiles said. "There's no way in hell I'd be able to force him to do anything he doesn't want to do."

"Fine," Laura said flippantly. "Then figure something else out. Just get him down here."

"Laura," Stiles whined, flopping back against the couch, "can't you do that yourself?"

"Stiles, this is my party and, as a respectable host, I've gotta be down here," she said, faking an air of class. "And I know you and Derek don't always get along, but I think he'll come down here if you ask him. So, please?"

Stiles grumbled a bit, shoving himself up and off the couch. "You owe me, Laura. You owe me big time," he mumbled as he went towards the stairs leading to Derek's room.

He knocked on the door and heard the muffled voice. "Go away, Laura. I'm not in the fucking mood."

Stiles pushed open the door anyway, and saw Derek lounging on his bed, To Kill a Mockingbird open in his lap. He walked into the room, over towards the bed, and just looked at Derek for a good minute.

"This is how you choose to spend a Saturday night?" Stiles asked, brow raised, almost like he couldn't believe it. "Tucked away, by yourself, with a book?"

"It's a good book," Derek said, not bothering to look up from the words on the page.

"Yeah, but there's a party going on downstairs," Stiles said, incredulously. "Some people actually go out and socialize on a Saturday night."

"So why are you up here, and not down there, picking out your next victim?" Derek asked. Stiles just stood there for a moment, dumbfounded.

"You got a problem with me, dude?" Stiles asked. "Why? What did I ever do to you?"

"I don't have a problem with you at all, Stiles," Derek said, turning the page. "I just don't think that you do it right."

"What do you mean by that?" Stiles asked, brows furrowing.

"Relationships. I don't think you do it right," Derek said, shaking his head lightly.

Stiles scoffed, taking a seat next to Derek on the bed, "I mean, I'm genuinely interested now."

"I just mean," Derek paused, staring pointedly at where Stiles was sitting. "You sleep with everybody. But you're doing it wrong. I mean, do you remain monogamous to any of those people?"

Stiles shook his head, "Why should I? They don't remain monogamous to me."

"Do you know what the problem is with you, Stilinski?" Derek asked, marking his place in the book and then closing it, setting it down on the nightstand next to the bed. While Stiles just shrugged, Derek turned so his body was facing Stiles more directly. "The problem with you is that you don't realize how much better sex is when there's feelings involved."

"I think you're full of shit," Stiles said with a scoff, shaking his head, pushing up off the bed and starting towards the door. "Not everybody needs feelings."

"Seriously, though," Derek called out, stopping Stiles in his tracks, "I bet you wouldn't last six months just fucking the same person, monogamously, without falling in love with them. I don't think you'd be able to do it, with the way you've shut yourself off from it, at this point it wouldn't take much."

Stiles gave Derek a thoughtful look over his shoulder, his mind whirling. Then, with an eyebrow raised, he asked, "What do I get if I win?"

"Huh?" Derek asked, obviously not expecting that answer from Stiles.

"Well, it's not a real bet if there's no wagers, is it?" Stiles walked back towards the bed, looming over Derek's seated figure. "So I bet you, Hale, that I could manage those six months and then some. I don't do feelings; everybody knows that."

Derek looked thoughtful for a moment before saying, "You want to lose so badly, fine. What do you want if you win?"

"Your Camaro," Stiles said automatically, not even taking the time to think of anything else. He'd had his eye on that car for too fucking long, and he'd never be able to afford one of his own. Not in this lifetime, anyway. "When I win, I want that."

Derek took a moment to think about it before nodding. "Yeah, okay. I bet you can't go six months without fucking anyone else, but me, without falling in love. And I'll stake my car on it."

"You took that bet way too easily," Stiles said, skeptical, sitting back down. "How come?"

"Because I know I'm gonna win," Derek said, a cocky smirk on his face, reaching for his book again. "I'm not in any real danger of losing my baby."

"What do you want – wait a minute," Stiles said, reeling back, something just clicking with him. "Why's it gotta be you?"

"How else am I going to know whether or not you stick to it?" Derek asked, not bothering to look at him as he opened his book back to the previous page. "That's the bet, Stiles. Take it or leave it."

Stiles thought about it for a moment. While it was true; Derek was pack, and it was never a good idea to get involved with pack, especially with a bet like this, Stiles was tempted. It was a slippery slope, and Stiles couldn't do anything to jeopardize his relationships within the pack, but at the same time, Derek was hot. He hid it all underneath the cardigans he wore, and the books that he carried around, but he was a very attractive guy. And part of Stiles wondered what Derek would be like in bed. He had a simplicity about him that Stiles could appreciate, but he wasn't stupid enough to mistake it for naivety. They always said it was the quiet ones you had to watch out for, and Stiles wondered if that applied to Derek.

After thinking it over for a few minutes, Stiles was confident in himself to go for it, so he nodded once. "Sure. I mean, I'm not going to lose, so why the hell not? What do you want if you win?" Stiles quickly pointed at Derek, his face showing determination. "And that's a huge if, buddy."

"You, washing the Camaro, inside and out, every weekend for a month," Derek said, "because I know you're not going to win, so I'm not in danger of losing it."

Stiles decided to ignore that last comment. His mind was made up, though, so he stuck out his hand, "I accept."

Derek reached out and they shook hands. A moment of silence passed with their hands still clasped together, and the awkward tension in the room mounted, like neither of them were very sure of where to go from here. Settling on ignoring the awkward silence, Stiles shamelessly let his eyes roam up and down Derek's body. Derek made a sound, voice caught in his throat, and took another moment to take in Derek's form before looking up and catching his eye.

"My eyes are up here," Derek said, the tip of his ears starting to burn and flush pink. Stiles smirked, running the tip of his tongue over his bottom lip.

"I know that," he said, raising his eyebrows suggestively, "but the bet means that I can do this now."

Derek nodded, "Very true. But the bet also means that I can do this now, too." And he leaned in, closer, lightly pulling Stiles' hand that was still caught in his grasp, giving Stiles every opportunity to push him away before he captured Stiles' lips with his own. Stiles didn't pull away and he didn't push Derek away, either. As their tongues danced together, Stiles felt some of the tension in Derek's shoulders ease away, and he heard Derek made a content noise deep in his chest.

Before Stiles even knew what was happening, Derek was pulling Stiles' t-shirt up and over his head, baring his chest to him. Derek had always thought that Stiles was gorgeous; he wasn't overly muscular like Derek, but he was broad and lean.

Despite his flaws, he was perfect.

Once Stiles' shirt was discarded, Stiles pulled Derek back to him, wrapping his arms around Derek's neck as he attacked his mouth hungrily once more. God, Derek was such an amazing kisser – Stiles had had a sneaking suspicion that he would be – and Stiles wanted to revel in the way that Derek tasted and felt.

As they kissed, Stiles worked at the buttons on Derek's cardigan, pushing it off his shoulders and pulled his t-shirt up and over his head. Once Derek was shirtless, Stiles took a deep breath and leaned back to look at him.

"God, your body's fucking insane," Stiles groaned, taking a moment to run his eyes over Derek. "You should definitely show it off more."

Derek just shrugged, before working at the buttons on Stiles' jeans.

Once the rest of their clothes were discarded, Derek captured Stiles' lips once more. He kissed him hungrily, and Stiles kissed back.

Kissing Stiles was everything that Derek had always imagined it would be, and more. It was true; Derek was in love with Stiles, and he had been for quite a while. Nobody really gave him shit about it except for Laura, Cora, Malia and sometimes Erica, but they didn't dare do it in front of anybody else. While Derek was pretty sure that every werewolf could smell the arousal when Stiles was around, nobody ever said anything in front of Stiles. But here and now, kissing Stiles was more than Derek had ever hoped for.

Stiles was such an enthusiastic kisser – which, Derek already knew he would be, considering all the stories people told about Stiles and his conquests. Everybody knew that Stiles was an attentive lover and knew how to make his partners feel good.

Derek broke the kiss and looked at Stiles through lidded eyes. "I want to blow you. Please tell me I can."

Stiles looked a little taken aback at first, like he hadn't been expecting that, but then said, "Actually, dude, I prefer to give them. Whenever anybody goes down on me, they can never get me there."

"That's because I've never done it," Derek said with a smirk. Stiles huffed out a laugh.

"That's kinda cocky, don't you think?" Stiles laughed, actually pretty surprised that Derek had said that. He wouldn't have though Derek would say something like that in a million years.

"Maybe a little, but I know I can get you there. Please, Stiles, let me suck your cock."

And hearing Derek beg him in that tone of voice almost did Stiles in for good. He wasn't sure that he could even speak, so he just nodded.

Derek grinned, and right then, Stiles resolved to see that look on Derek's face more often. When Derek grinned – not a sarcastic grin, but a real, honest-to-God smile – it made his whole face light up, and Stiles was sure he'd never seen anything more beautiful.

Derek pushed over on the bed, letting Stiles climb up and sit with his back against the headboard. Derek followed his movements like a hawk, taking in every inch of Stiles' body. When Stiles was settled, Derek took one last moment to look, before settling himself on his knees between Stiles' legs.

God, Stiles was gorgeous. And yes, Derek had always known that Stiles was. But if Stiles was gorgeous with his clothes on, he was absolutely breathtaking with them off. Derek could feel his thoughts start to run away with him, but he could tell that Stiles was starting to get nervous, and that's when Derek realized he'd been staring.

He mumbled an apology before taking Stiles into his mouth. Now, Derek wasn't majorly experienced – not like Stiles was – but something about being with Stiles gave Derek the confidence he needed to proceed. He licked a stripe up Stiles' cock before taking him into his mouth. He felt Stiles' cock hit the back of his throat, and Derek felt like he was in heaven.

He may not have been as experienced as Stiles was, but he wasn't exactly inexperienced, either. What Derek said to Stiles was true; Derek didn't believe you should sleep with someone unless you actually had feelings for them. Call him old-fashioned, but that was just the way he was hard wired. And while some people would say he was just hypocritical, he had feelings for Stiles. However, they weren't reciprocated. But in doing this, Derek was hoping that maybe, just maybe, Stiles would start to have feelings for him as well.

Derek loved the way that Stiles tasted, like clean sweat and musk and something that was completely and purely masculine, and he loved the way Stiles felt on his tongue. As Stiles' cock hit the back of his throat, he hollowed out his cheeks and suckled lightly. Stiles' hands flew to Derek's hair, not tugging or pulling, just running his fingers through it and holding on. Derek bobbed his head, taking Stiles in deeper and deeper each time, and Stiles let out a groan. Derek pulled off to look at Stiles.

He had been biting his lip, trying not to make a whole lot of noise. However, that just wouldn't do for Derek. Call him an egotist, but he needed the confirmation that Stiles was actually enjoying what Derek was doing to him. So he pulled off, stroking Stiles' cock a couple of times, looking up at him, and when they locked eyes, Derek said, "Don't do that. Don't hide your noises. I wanna hear you. Let me hear that I make you feel good."

He swallowed Stiles down one more time, and even though he had been prepared for it, it also took Stiles a little by surprise. His grip on Derek's hair tightened as Derek once again hollowed out his cheeks and bobbed his head. He was getting Stiles a lot closer than anybody ever had before. God, Derek was just fucking amazing at this, and when he put pressure on the underside, Stiles was actually worried that he was going to blow.

"Pull off," Stiles said urgently, grabbing Derek's hair to get him to stop. "I'm really fucking close."

Derek wanted to taste him – God, did he ever want it. But he also wanted Stiles to fuck him, so grudgingly, he pulled off after licking a stripe up the underside of Stiles' dick one more time.

"Come up here," Stiles said, making grabby hands at Derek. He pulled him up so Derek was sitting in front of him, straddling his hips. Once he was stable again, Stiles lunged at Derek, sealing his mouth over Derek's, kissing him hungrily. Stiles chased the flavor of himself that was on Derek's tongue, and moaned when he found it.

"I want you to fuck me," Derek said, breaking the kiss. "Please, Stiles, please fuck me."

Stiles swallowed the lump that was in his throat and then said, "You sure?"

"Absolutely," Derek said. "I really, really want you to fuck me. Will you?"

Stiles nodded, and Derek leaned over him, reaching for his nightstand. Derek rummaged through the top drawer and produced a half-empty bottle of lube, handing it to Stiles.

Stiles grabbed the lube when Derek handed it to him, and then pulled Derek down to kiss him thoroughly. He moaned as their tongues danced together. Stiles started kissing his way down Derek's chest, pushing him back slowly. He wanted to draw this out, to tease him, to make Derek's orgasm so much better.

He pulled back and pushed Derek back gently on the bed, so that Derek was lying there, on his back. As Stiles slicked up his fingers, he leaned down and swallowed Derek's cock. He fingered Derek open as he went down on him, and Derek was moaning and writhing with pleasure. When Stiles was three fingers in, scissoring them, Derek groaned out, "Please, Stiles. I'm ready. Just fuck me."

Stiles withdrew his fingers and pulled off of Derek's cock. He looked at him, "Do you have any condoms?"

"I just want you," Derek said. "Please. You know I'm a wolf, which means I can't catch or carry anything, and besides that, I know you get tested every couple of months anyway. So please, I want you – just you."

Fuck, was this guy trying to kill him?

Stiles licked his lips before nodding, "Sure. I can do that."

Derek rolled onto his stomach as Stiles slicked up his cock. He guided the blunt head of his dick into Derek slowly, groaning when he felt the tight heat starting to welcome him. Once he was all the way in, he paused for a moment, letting Derek adjust to his size, and kissed the triskele tattoo that Derek had on his back.

It wasn't until Derek started pushing himself back, fucking himself on Stiles' cock, that Stiles started to thrust. He started slowly, reveling in the way that Derek felt around him, his ass gripping Stiles' cock.

"Fuck," Stiles said, kissing the tattoo once more. "God, you feel so good, Derek. So hot and tight; shit, it's so, so good."

Derek didn't say anything, he just let out a moan, but it was enough to tell Stiles that he was doing a good job. As Stiles fucked in and out of Derek's heat, he wrapped his arms around Derek's torso, bringing him up on his knees, and started leaving love bites on his neck. He knew they'd heal instantly, but that didn't mean he didn't try.

Derek moaned; Stiles just felt so fucking good inside of him. He had fantasized about sex with Stiles so many times, but even the most explicit of his daydreams couldn't compare to this. This was something that Derek had wanted for a really long time, but this was way better than even the best of his daydreams.

Derek started fucking himself back on Stiles' cock again with more vigor and moaned out, "C'mon, Stiles, stop holding back! Faster! Harder! Please."

Stiles complied and it wasn't long before Stiles was groaning out, "Shit, Derek, I'm gonna come. Are you close?"

Derek nodded. "So close," he panted. Stiles reached down and wrapped a hand around Derek's cock, stroking in time with his thrusts, and it wasn't long before Derek was coming. He came all over Stiles' hand as he clenched down on Stiles' cock, and Stiles groaned as he came inside of him.

They both had a sheet of sweat on their bodies, and Stiles kissed the back of Derek's neck once before taking a few shaky breaths and then pulling out. He grabbed a tissue out of the box on Derek's nightstand, wiping off his hand, and then said, "You're pretty good at that, Derek." Stiles started getting dressed again and then said, "I'm looking forward to seeing where this bet goes. But this was good, thank you."

Derek was still feeling a little breathless, and he turned over to sit on the bed just as Stiles leaned down to kiss him once more. He kissed him filthily and then said, "I'll see you later."

Stiles was halfway down the stairs before he realized that he never told Derek to join his sister's party, and Laura was probably going to kill him for that. He shrugged it off, though; it had been fucking worth it.