Title: The Swap

Rated for: T

Genre: Family, Friendship, Adventure,

Fandom/Universe: Supernatural

Characters: Dean Winchester, Sam Winchester, Bobby Singer, Castiel / Pastor Jim, Mary Campbell, Samuel Campbell, Deana Campbell, Christian Campbell, Mark Campbell, Gwen Campbell, Henry Winchester, John Winchester, Adam Milligan, OC's - Diana & Samantha Winchester.

Pairings: NONE

Spoilers/Warning: Mentions or info of some episodes through all 8 seasons. This chapter is taking place in S7.

Disclaimer: Supernatural and all related characters are copyright Eric Kripke, Kripke Enterprises & The CW Network. No infringement intended.

Summary: They were looking into a forbidden hunt – as per usual.

Status: in-Progress

Author's Note: Still AU, still having fun playing with the idea of 'what if'.

Chapter: Samantha

He's dizzy and on the floor. His nose wrinkles at the musty smell from the dirt packed floor.

"I want her back!"

He shifts, turns over and spots the blond girl holding her gun aimed at him.

"Hey! You-. Fuck!" she kicks the table over sending the bowl and its contents flying. There's no one else in the shack.

"What happened?" he sits up only to raise his hands in surrender when the gun is aimed at his head yet again.

"Don't move!" she orders. He sits still, hazel eyes drifting around the shack. "God damn… why couldn't Di be wrong again?" she mutters.

"Uhmm." He doesn't get a chance to question her.

"Quiet! You're going back where ever you came from and I'm getting my sister back."

"Look," he tries again. "I don't know what's going on." He looks around, confused. "Or where I am..."

"Right," she reaches into her pocket and pulls out a flask. "First things first." She unscrews the lid and holds it out. "Open up."

He's leery about drinking anything out of a flask from some strange young woman he can't be sure is what she looks like. "What? Wait-."

"I'm not asking." She states and the gun never wavers. "I'm telling. If you're a regular Joe, then…"

"You're a Hunter." He's not exactly relieved by the discovery but at least he knows what he's dealing with. Or thinks he does.

"And I still don't know what you are." She points out. "Open."

He does as she asks hoping it's only holy water and not … well, something else. She's not happy, tries salt and continues from there each time getting a negative. It's when the shiny silver blade comes out that he has another moment of panic.

"On your stomach. Pull up your sleeve." The blade flips in her hand with ease.

"Wait!" he protest in alarm.

"Now." She doesn't hesitate to kick him on his back. He grimaces and turns over doing what she says.

"Look, you don't have to-." He stops talking when he feels the gun pressed against the back of his neck.

"Don't. Move." She's got no other 'tests' and so far he's coming up human. The blade swipes clear across his forearm and of course it stings but he keeps it in. "Your name." she steps back from him with the gun still aimed at his head.

"Can I get up?" he questions, turning over carefully.

"Funny name." she quips. "Parents don't like you much, huh?"

He grimaces and slowly gets to his feet. "Sam, after my grandfather." He's 'annoyed' to say the least.

"Huh, and his name?" she's suspicious. There's something about the hulking giant she can't put her finger on that's giving her the heebie-jeebies.

"Samuel Campbell." Sam doesn't miss the shock on her face.

"What the hell are you?" she demands through gritted teeth. The gun is always in his face and he steps back.

"I'm a Hunter, like you." Sam replies, quickly raising his hands in surrender. "I don't know what's going on, how I got here- where am I?"

"You... you're… you can't be." She trails off, her eyes shimmering in the weak light from the dirty window. "Who are you! Your full name!"

"Sam Winchester."

She's more than upset. But her gun drops slightly. "Your Dad…?"

"John Winchester. Did you know him?" Sam wonders as he takes a tentative step towards her.

"You're lying!"

He doesn't expect the violent denial or the rage in her expression. "You're a liar! He wouldn't!"

"What- wait!" Sam backpedals, that gun is up and in his face once again and he's confused about what the hell is happening. "I'm not- John Winchester was my Father. I'm Sam Winchester. My brother is Dean Winchester-."

"Two." She stops her forward rush and the gun slowly drops to her side. "There's two of you?"

"Did you know my Dad?" Sam hesitates to move anywhere near her.

"Know…?" she looks up and the tear that slides down her cheek gets wipes off roughly. "Why do you keep talking of him in the past tense?" she glares at the shack. "What kind of fucked up trick is this?" she turns back to Sam. "You can't be his- he wouldn't!"

Sam realizes she's trying to convince herself.

"Who wouldn't…?" Sam blinks, straightens up. "Oh… my God." Now he's incredulous and disappointed. "You're… is he…? Sister." He runs both hands through his hair. "There's two of you?" he looks around but it's just them. "Where is she?"

"Shut up!" she demands with a little stomp of her foot that would be ridiculously funny in a different situation. "I let the whole thing with Adam slide. I even talked Diana into-."

"Adam?" Sam cuts in. "Adam Milligan? He's alive-?"

"How do you know about our brother?" she demands.

"Look…" Sam isn't sure what he should say but he knows enough to be careful.

"Start talking." She cocks the gun and aims it at Sam again. "All of it; your Mother, how long ago did it start, where the hell did you come from and …" she blinks because the idea that he'd lied to her even after he'd promised!

"Ok, alright." Sam breathes. It's never easy but it's worse now that he knows the things that happened to his family were because of him. "My Mom died in a fire when I was six months old. Her name was Mary Winchester. Campbell…" Sam has a bad feeling due to the expression slowly forming her features into rage.

"Oh," she breathes. "You... fuck-." The gun is once again coming up. "I'm going to fill you with lead! You son of a bitch!"

Sam lunges the short distance between them and grabs at the gun. It goes off twice in the struggle but neither is close to being hit. She jabs a fist close to his groin he doesn't expect. Sam is still trying not to hurt her- his half sister. Her foot gets him good and they end up on the packed dirt floor grunting and rolling around until Sam has the gun.

"Get off!" she demands and reaches back to claw at his face.

"Calm down." Sam orders tossing the gun far away from them. He tries to grab the free arm but she's wily. "Quit trying to kill me and let's figure this out." He groans again from the elbow she jabs into his side.

"Already did and you're going back one way or another." She bucks under him trying to remove his weight from her back. "Get OFF!"

"Go back to where?" Sam shoves down on her back and sort of sits up. "I don't even know where here is!" he doubles over and grabs the fist flailing blindly towards his face. "Stop hitting me!"

"NO! If you're my Dad's then-."

"Your Dad?" Sam gets confirmation but it still surprises him.

"There are body parts touching that shouldn't, you perv!" she screams like he hasn't heard her already. "Get off!"

Sam definitely feels weird. "Just … stop hitting me." He's totally weirded out but he's fast to get off his sister. They both scramble as far from each other as the shack allows. "Now," Sam draws in a breath and carefully keeps her gun at his side. "What's your name?

She laughs. It's not filled with humor and her hazel eyes lock with his. "Samantha Winchester."

Sam snorts a short breath. He knows Dean would find that so friggin hilarious. He shakes his head. "What's going on?"