"What I want doesn't matter," whispered Derek.

"Now I know that is bullshit." Stiles folded his arms across his chest and glared at him. "You just think what you want doesn't matter, or Boyd said as much."

Derek's eyes narrowed. "What did he say?"

"That you didn't feel like you were worthy," answered Stiles. "Of a mate or a Pack, he wasn't exactly forthcoming."

"I'm not an Alpha." Derek glanced over at him, shaking his head when Stiles opened his mouth to complain. "I'm not, not really. I was born a beta and I was quite low in my mother's Pack, and then when Laura became Alpha she took me on as her beta. I'm not suited to being an Alpha."

"Which is why you made Scott turn me?"

"Yes," said Derek.

It made sense in a way, even though Derek had been a ginormous douche when they had first met him he had seemed supremely confident in himself and in his skin. However after killing Peter, the first time, and becoming Alpha himself Derek had become more and more introverted.

"Can beta's take mates?"

Something inside him was supremely uncomfortable about the idea that if Derek hadn't have killed his uncle he would never have found Stiles attractive, and he had to curl his fists into his thighs.

"Of course," answered Derek. "We're not actual wolves you know?"

"That's good."

He looked up then to see that Derek was staring at him with what could only be described as dread. "You're thinking about taking a mate?"

"No, not like I could anyway since I'm mated to you."

"Scott could break …"

"No." Stiles cut him off. "If you want this gone you break it."

He lifted his chin defiantly, and for a long moment they simply stared at each other before Derek closed his eyes and shook his head.

"No," he muttered. "I don't want to break it."

Stiles didn't know what possessed him to do what he did, but the next thing he knew he had climbed over the centre console and moved to straddle Derek's thighs. The steering wheel was digging into his back and he had to brace his hand against the leather seat above Derek's shoulders but there was something about the surprise in those light grey eyes that made his wolf sit up and preen.

"Then don't," he whispered.

He leaned down then and gently pressed his lips against the other man's. Even though he was now a werewolf Derek, whether Alpha or not, was far stronger than he was and Stiles could still find himself thrown through the windscreen if he was rejected. And then Derek would be really pissed off if there was a Stiles sized hole in his car.

Fortunately Derek chose to pull Stiles closer by his hips and opened his mouth with a soft moan. The kiss deepened but stayed achingly gentle and cautious, something which caused Stiles to whimper and try to wiggle even closer. They kissed for what felt to Stiles like hours, the slide of their mouths becoming more and more heated as Derek sat up straighter in his seat. One of his large hands slipped up the back of the leather jacket and braced against the bare skin at the small of his back. It felt like he had been shocked with electricity and Stiles couldn't help the way his hips bucked forwards into Derek's overwhelming heat.

"Fuck,"murmured Derek, pulling away from the kiss only to press his lips against Stiles throat. "What you do to me …"

Stiles couldn't even answer that, instead he tipped his head back in what he knew was a submissive pose, and simply whined low in his throat. Derek made a soft animalist noise in response and sucked a mark into the side of his neck that Scott had bitten, Stiles got the feeling that it was some sort of challenge to the other Alpha. Not that Scott would do anything about it, well other than tease him incessantly anyway.

Soon they were kissing again, the sound of it filling the car along with the harsh breathing as the windows fogged up and the air become hot a clammy between them. Stiles was so caught up in the moment that when Derek pressed the heel of his free hand against where Stiles' erection was pushing against the worn fabric of the trackpants. God he really hoped Lydia's dad wasn't going to want these back because with the way that Derek was caressing him there was no way he was going to last very long at all.

"Derek." He moaned against the other man's mouth. "I'm …"

Derek kissed him with even more passion then and Stiles couldn't stop his hips rocking desperately. It was just as he felt his orgasm start to rise up from his belly, every muscle locking up in anticipation, that there was a knock on the window right beside their heads.

It only took a minute for the fog to thin in Stiles' mind and the scent of his own father to filter through to him. Derek must have noticed as well because his eyes widened and he pressed his fingers against his swollen lips, and that just shouldn't be as hot as it was. Taking a deep breath he swallowed down the lump in his throat and leaned over to press the button that would put down the drivers side window.

His dad was stood in his uniform, torch in hand, and a knowing but disappointed look on his face.

"How did I guess?" he demanded.

"Hey dad." Stiles raised a hand from Derek's shoulder and waved. "Nice night isn't it?"

"Get out of the car Stiles."

He really really didn't want to do that since even having his dad interrupt them at the worst possible moment hadn't abated his hardon, and the idea of standing in front of his dad at full mast was humiliating at best.

"Um I don't think you want that right now dad," he said.

A flush came to his dad's face. "You're wearing pants aren't you?"

"Yes dad I'm wearing pants."

He felt Derek nod and his dad's eyes narrowed in his direction. "Are you both wearing pants?"

"Everyone has pants on," said Derek. "Sir."

"Get out of the car."

Taking a deep breath Stiles opened the door and slowly climbed out, wrapping the leather jacket tighter around himself against the cold.

"Dad …" Stiles stepped aside to let Derek out of the car. "This is exactly what it looks like."

Behind him Derek groaned. "Stiles."

"Well at least you're honest with me," said his dad. "Now I said I could live with you two …" He waved his torch around as though to try and convey what he didn't want to say. "... but at home where I know you're being safe."

"Oh god dad." Stiles buried his face in his hands. "Derek isn't going to get me pregnant."

"Ok I really didn't need to know your sexual dynamics," muttered his dad.

Derek made a noise behind him like he was dying. "Sir?"

"Go home Derek." Stiles' dad pointed at the car. "And I think we're all going to need to sit down and have a talk in the next few days." He turned to Stiles. "Get in the cruiser."

Stiles nodded his head and stepped away from Derek, immediately missing the heat he radiated, and moved towards the cruiser. After a moment though he turned and hurried back to where Derek was trying to get into his car without turning his back on Stiles' dad as though he expected to be shot in the back. Without saying a single word he reached up and fisted his hand in the Alpha's hair, trying not to wince at the copious amount of product that immediately coated his hand. With a soft noise he pulled his mate's head down and took those surprisingly lush lips in a deep kiss before turning around and striding to the cruiser and climbing into the front seat.

A few minutes later his dad slid into the driver's seat and slammed the door.

"Just how serious is this?" he asked.

"You saw …"

"How serious Stiles?"

Stiles looked down at where his hands were resting in his lap and starting picking the dirt from under his fingernails. "Serious enough."

"Do you love him?"