Disclaimer: Not mine…

Author's Note: Hey, this is my first time writing Chuck fanfic, I've just recently gotten into the series and I'm on one of my obsession kicks. I get completely enamored with a couple and it takes weeks, sometimes months, before I can stop talking about them/writing about them/ or watching them non stop. I have other things that I know I need to work on but I've really been wanting to write a chuck fanfic. This is kinda my test run to see if anyone would like to read my latest idea. It would probably pick up around the time Chuck and Sarah find Chuck's dad. They discover that Chuck isn't really the youngest Bartowski like they always thought, he actually has a little sister. Okay, um you don't really need to know much about her just yet to get the story and like I said this is just a trial run to see if anyone would read it…well, here goes nothing...

Brother vs. Sister

Chuck made his way into the Orange Orange and through the hidden entrance to the Castle through the freezer. He froze at the top of the steps when he heard the sounds of fighting. There was a rough smack followed by a grunt. He didn't stop to think he looked around and prepared to rush into the fight. If Sarah was in danger there was nothing that could stop him from helping- even if there was actually very little he could do. His accelerated heart rate slowed when he saw that it was just Kaitlyn playing her playstation on the big screen. Kaitie was sitting cross-legged on one end of the table and Sarah was sitting in a chair at the other end of the table filling out her reports; in general ignoring the young teenager's use of government equipment. Kaitie jerked hard on the controller like Chuck did when he was playing. Her character, Buffy, used her wooden stake to kill the vampire she'd been fighting with and Kaitie laughed and muttered 'take that' under her breath. Chuck shook his head with a slight smile and continued down the stairs. When he'd asked if they could use one of the screens for a game Casey had hit him upside the head and Sarah had just laughed. Kaitie, it seemed, had unmitigated control over the entire team. Even General Beckman didn't pick on her too often.

"Hey!" he called to the two girls. Sarah looked up and gave him a warm smile. Kaitie, without turning, yelled over her shoulder.

"Hey Charlie boy! How's Buy More today?"

"Boring," Chuck admitted with obvious pleasure. It seemed that the past few weeks had been non stop missions and secrets. He wasn't even sure how he'd managed to drag himself out of bed this morning after the…well he was trying not to think about it. Sarah smirked and nodded her agreement.

"Boring is definitely good," she agreed as Chuck pulled out one of the chairs so he could watch Kaitie play.

"Okay, how is that when I asked if we could use one screen for games I got hit and now my younger sister is sitting her doing just that?" he asked. Kaitie paused her game and turned to look at him.

"Because I'm more convincing than you?" she questioned with a raised eyebrow. Sarah muffled a laugh and Chuck scowled. "No, I have it! They like me more!"

"That's not true! Sarah, tell her that's not true!" Chuck whined and Sarah tried to keep a straight face as she shook her head.

"Na-huh, I'm staying out of this: this is a brother/sister thing," she declared gesturing between the two of them.

"Casey!" Kaitie called and a second later Casey emerged from deep with in Castle. He'd probably been cleaning his weapons. "Casey, tell Chuck that everyone likes me better," she demanded with a pout. Chuck rolled his eyes and Casey gave the 'not-again' grunt.

"I've no doubt about it, you're the least annoying of the both of you," Casey replied before returning to his guns. Kaitie stuck her tongue out at Chuck with a 'so there' look and Chuck replied in kind.

"Doesn't count, Casey has always liked you better."

"So what?" was her witty comeback.

"That's the best you can do?" he scoffed " 'So what'?" Kaitie turned back to her game and pressed play. She continued her battle with the mummies that were popping up out of graves.

"I bet even Beckman likes me better," Kaitie continued ignoring him. Chuck nodded, conceding her point.

"Alright I'll give you that, she probably does," he admitted. Sarah looked back up at him and raised an eyebrow.

"Probably?" she questioned. He sighed.

"Okay, definitely, but that still doesn't explain why Kaitie gets to use the screens for her game I can't use them for mine." Kaitie laughed and stabbed another zombie with a shovel she picked up.

"Cause you're supposed to be a big boy. I'm still a kid." Chuck rolled his eyes.

"Yeah, a kid who can take down men twice her size and knows how to use about forty different kinds of weapons," he muttered loud enough for both girls to hear him.

"Well then it just goes back to what I said at the beginning. Everyone likes me better."

Chuck groaned and let his head fall onto the table. It was like arguing with a two year old. Sarah rubbed his back with the hand not writing her reports and Kaitie let out a squeal of joy as she defeated the spell that had been put on the graveyard. She turned to look at them and grinned. Sarah saw her and felt herself redden but did not remove her hand from Chuck's back. Kaitie had made it very clear on what she thought about their relationship. Sighing as if with great reluctance Kaitie tapped Chuck lightly on the head.

"Do you wanna play Charlie boy?" Chuck looked up and grinned, reaching for the controller. Kaitie scooted back a little on the table stretched out her legs. "I'll see if I can use my powers of manipulation to get you some game time. Even?" she asked him as he waited for the next level to load. Chuck grinned at his sister and her blue-green eyes sparkled with mischief.

"Even," he agreed. Kaitie jumped down off the table and went off toward were Casey had disappeared. She turned at the last minute and called back.

"I'll leave the manipulation of Sarah to you though! I'm sure the two of you will enjoy that!" Chuck and Sarah went red as Kaitie turned back around and started calling out.

"Casey! Cassseeyy!!" In a sing-song voice. Chuck and Sarah exchanged a look and burst out laughing.

"I pity the U.S. government," Chuck remarked once they'd settled down. "They have to keep her under control." Sarah nodded and closed her reports to watch him play.

"Yes, you Bartowski's are trouble," she agreed. Chuck gave a mock bow and his special Chuck smile.

"We try."

So I'm not sure if it's the best thing I've ever written but I thought it was kinda funny. I've got an actual plot for the fic if people want it and I have a Chuck/Buffy crossover in mind too…depends on the reaction too and how long it takes to write this one. Let me know! If not it'll just sit on my computer until I get the urge to delete it.

-Phoenix