A/N: I may owe MySongStory royalties on this, but I like finding songs that make chapters work. I'm not going to rehash cannon because obviously, it's heading down that AU path.

Disclaimer: I don't own Chuck.

He was standing outside his apartment, rubbing his jaw. She had slapped him so hard that he was seriously surprised it was still connected to his head. He started to unlock the door, when he heard the voice behind him.

"We have to talk."

That didn't sound good. He didn't even look at her, he just unlocked the door and let her in. She walked past him, a coolness like he had never felt. He shut the door, and the next thing he knew, he was pressed against it.

"What the hell, Chuck?" she asked, her voice low, and… dangerous. A danger he found he enjoyed.

"You told me to kiss you," he retorted, a smirk growing.

"Do you know why I slapped you so hard?" she asked, her lips, right near his, so close he could almost taste them. "I slapped you because when you kissed me like that, you nearly destroyed my cover."

"So, you're saying the nerd about made the agent drop her guard?"

She smirked at him. "You know damn well you've been making me drop my guard for a long time," she said. "Screw it." She dove in, and kissed him hard against the door.

"Ellie and Awesome," he began.

"Damn it!" she growled, pulling away from him. She ran a hand through her hair frustrated.

"This probably isn't wise for me to say, but this does wonders for my confidence, seeing you frustrated that you can't be with me." Sarah turned to him and tried to glare, but he just shrugged.

"And that confidence makes me want you even more," she retorted. "I need to leave, we're close to getting you back in, and I don't want to blow all of this hard work."

He stepped across the room and pulled her into a hug, and she melted against him. "Did I screw things up at the club?"

"No, not at all… wait, there was actually a gun on me?" Sarah asked, pushing away.

"Yes!" Chuck replied.

"Oh, so that wasn't all…oh…" She smiled at him.

"You are enjoying this," Chuck accused her.

"What, sneaking around, screwing over the people who screwed over us, being together, but having to hide it?" She bounced a shoulder.

"So, it's as hot to you as it is to me?"

"Oh, God, yes!" she said, wrapping her arms back around him. "I don't want to do it forever, but sometimes… sometimes…"

"I know," Chuck replied.

"I gotta go," she said, as she gave him a peck and backed away. She was giggling as she opened the door and turned, right into a group of Ring agents.

}o{

In Castle, after Casey saves Chuck and Sarah

"So, Team Moron's back together," Casey grumbled to Sarah, watching Chuck celebrate after Beckman's announcement.

"Apparently," Sarah said, almost sulking. "I thought I was finally getting away from all of this."

"Yeah," Casey replied, nearly laughing. "That's what you thought was going on." Casey stood there watching Sarah struggle not to react. "You know, given what you two have been through, I always thought it would push you two together."

"He didn't want me," she said softly. Casey snorted, loudly. She turned toward him. "He didn't," she insisted.

"Uh huh," Casey said, shaking his head. He felt Sarah stare at him. "Fine," he said, turning to her. "We're gonna play this?" He walked he over to a computer that Sarah couldn't see. "I thought he was gonna eat a bullet," he said as way of explanation. He hit play, and Sarah saw it, her entering the back of Chuck's place. "Making sure he was tucked in for the night."

"Casey, we may have not had… anything, but I couldn't take the chance he'd kill himself. I had the same worries."

Casey rolled his eyes, and played another tape of Sarah kissing Chuck in the club. "Again, I didn't say I didn't have feelings for him."

"Why were you in Prague?" Casey asked. Sarah stood there. "I know what you're doing." He held a hand up before she could respond. "I just hope you know you can trust me. I get Beckman, I get the CIA, I get the NSA, or anyone else, but me… hell, Walker, just don't get the kid killed."

"If I did know what you're talking about, how could I get him killed?" Sarah asked, intrigued.

"He'd follow you to hell and back," Casey replied.

She stood there quietly, looking away. Then she looked him in the eyes. "And who says I wouldn't do that for him?"

Casey took a deep breath, and nodded in understanding.

"Do you know what he told me?" Tears were forming in her eyes. "I asked him to run, Casey, with me, and he told me no, because of what might happen to other people. Would they have died over our actions? Could Chuck live with that?"

"Christ, it's worse than I thought," Casey muttered.

"Fine, you want to know? I love him." Casey flinched. "He's my shelter, Casey. He keeps me in this world, because while I can work in our world, I'm not of our world."

"'Bout time you figured that out," Casey replied. Sarah stared at him. "You're not built like me. I thought for a long time you were, but it's obvious you are more like him than I ever realized." He stood there a second. "And, he's more like us than I gave him credit for." Her eyes widened. "Walker, he's saving lives. What's different in that than what we're doing?"

"Nothing," she said. "Except he's doing it, and not getting any credit."

"How about you give him all the credit he needs," Casey said with a smirk. Sarah rolled her eyes. "I'll tell Beckman that we need to reestablish your covers."

"Casey," she began.

"Take him home. You two have a lot to work out," Casey said. Sarah shook her head and headed toward Chuck.

"Come on, we have a cover to reestablish," she said.

"Is everything okay?" Chuck asked softly. She didn't say anything, leading him up the stairs and out of the Orange Orange. "He knows?"

"Not your fault… mine," she said, leading him to the Porsche.

"Yeah, it is my fault. We didn't give him enough credit," Chuck replied. Sarah nodded her head a few times. "Mind if I play with the radio?"

"Go ahead," she said.

"Are you worried?" Chuck asked, playing with the knob. "Oooo."

I'll see you through, I'll cover you

With a love so deep and warm and true

I will be there

Honey I'll be your shelter

I'll be the one to take you through the night

"That's us, isn't it?" Sarah asked, nodding to the radio.

"I'd like to think," Chuck replied. "Taylor Dane, very underrated. Wait." He looked around at their surroundings. "Where are we going?"

"We have a cover to reestablish," Sarah replied, a grin growing on her face. "I figure you staying the night at my place helps reestablish it."

"But I don't have any clothes," Chuck protested. She gave him a look and then shook her head, smiling. "Oh." Sarah grinned and drove on.

Whenever you need shelter I'll make everything alright, make everything alright

A/N: Are we still interested?