Disclaimer: I own nothing but my original character.

Title: Anticipation
Summary: Season 5 AU. Sam and Dean thought Kae was just another hunter with a shitty past that had roped them into finding a couple of wraiths that had killed members of her family. They didn't anticipate getting roped into a war over a cambion...and Dean sure as hell didn't anticipate falling for something he'd been trained to hunt down and kill.
Genre: Drama/Romance
Rating: T
Pairing: Dean/OC
Spoilers: Anything from 5x06: I Believe the Children Are Our Future - 5x22: Swan Song is fair game

Prologue:
Atlanta, Georgia
October, 2007

"I don't know about this."

"What the fuck is there to not know? We're tracking a wraith, Sammy."

"Actually you're helping me track down a couple of wraiths so I can kill it." Dean looked from his brother to the woman who was seated on one of the beds of their motel room, sharpening the silver knife in her hands. Long brown hair marred by red streaks and blonde highlights framed a pale, round face that had bright green eyes and thin lips.

She wore a ratty sky blue tee shirt that showed off an average sized waist, dark wash jeans and beat up white tennis shoes.

"And we're supposed to just trust you? What's with the possessive nature, Princess?"

Her hand froze and gripped the handle of the knife so tightly that Sam was actually afraid she'd break it. When she actually did, and swore out loud, Dean went for his gun and pointed it at her.

"Who the fuck are you?!" he demanded.

The woman tossed the broken knife aside and stood, arms folded.

"First off, Dean, I told you my name at the bar. It's Kaelyn, or Kae - and if you ever call me Princess again, I'll slit your fucking throat."

Dean shrugged and Sam's mouth twitched like he wanted to laugh, but tried to remain serious.

"Look." he said, "Kae...we need more to go on than the fact that you know there's a wraith in town killing people. We just saw you break that knife handle with your bare hand...so just set things straight and we just need to know what we're dealing with."

Kae frowned.

"For starters, what the hell are you?" Dean asked abruptly, not lowering his gun.

Kae's eyes narrowed, but instead of answering him, she grabbed her purse and headed for the door of the room.

"Forget it. I'll kill the damn things myself. Screw you both."

She left the room without looking back.

Sam glanced at Dean. "She said wraiths."

Dean groaned and quickly grabbed the keys to the Impala. "If we leave now we can still tail her."

"Okay."

Kae grabbed another knife out of the duffel in her back seat. She'd driven all the way out to the wraith's - well, Taylor Barnes's house.

The guy had a wife and three kids all grown up and on their own. He was CEO of the Atlanta branch of SucroCorp. Kae wasn't sure of what exactly the company did. It was some kind of healthy eating type of company.

That didn't really matter.

What did matter was that five years ago, he and his wife had killed her half-brother Aiden and her half-sister Layla.

It had taken her this long to discover who they really were. That was why she had roped the Winchester brothers into helping her kill them. If she did it herself, she was likely to end up like Aiden and Layla and the two monsters would escape again.

That was the most likely outcome of what would happen if she went in now. The Winchesters had almost discovered what she really was...and she knew Dean would shoot her first and ask questions later. That was how she'd heard he opperated.

Sam was a different story - maybe he'd believe her, maybe he wouldn't, and he'd kill her. There was no way to know to be honest.

That was why she ran.

Someone knocked loudly on the driver's door window of her car, pulling her out of her thoughts. When she turned, she saw Dean and Sam standing outside her car.

Son of a bitch.

"I'm gonna kill you!"

"Kae come on!" Sam tried to grab her as she stepped over Taylor's body, gun pointed at Dean's chest. "It was an accident!"

"He let the bitch escape!" she screamed, lunging forward, only for Sam to wrap his arms around her waist in order to restrain her.

The hunt had gone fine...Kae had slipped into the house and caught the Barnes' unawares. She'd caught Taylor and killed him easily.

His wife had been more of a challenge - it wasn't long before Kae had found herself pinned to the ground with her skull about to be cracked open.

Dean and Sam had broken in, and Dean had gone for the kill. Unfortunately this had only provided long enough distraction for ithe wraith to escape.

Kae was beyond pissed off.

"You asshole, this was my kill!" she screamed. "I told you to wait and I'd holler if I needed you!"

"Hey let's get something straight, Princess, I don't take orders from you," Dean snarled back. "I don't know you, and I don't trust you. So -"

Kae wrestled free of Sam's grip and grabbed her own gun from where it lay on the floor. Her hands shook slightly as she lifted it and pointed it at the elder Winchester brother.

"You don't give me orders either, Dean," she spit out. "If I ever see you again, I'll kill you."

And then she vanished right before their eyes.

Dean stared at the spot she'd been standing in moments before, at a loss for words.

One thing was for sure; he hoped he never saw Kaelyn again.

Kinda nervous as this is my first Supernatural fic I've ever written. Hope y'all liked it - feel free to review! I accept constructive criticism - no flames please!