Dean and Sam walked into the police station just as a woman walked out, ducking passed them, like she was trying to hide her face. She was about five foot four with a medium build and blonde shoulder length hair. She had ripped jeans and brown combat boots on, with a green plaid shirt, a leather jacket and black sunglasses. Something about her was really familiar, but Sam couldn't place her.

Sam frowned and shared a glance with Dean as they left the station a few minutes later and he saw the girl again. "I see her," Dean mumbled as they walked towards the car.

"I think she's following us." Sam said once they were in the car.

"Either that or she's working the case," Dean said. "She's been a step ahead of us this whole time."

"You think she's a hunter?" He asked.

"You don't?" He raised his eyebrows.

Sam frowned. "There's something about her, I feel like I know her from somewhere."

"Well, there's only one way to find out." Dean said and he began driving.

They drove over to a bar and went inside, grabbing a few burgers and some beers. She walked through the door a few minutes later and went to the bar. They watched her subtly look their way a few times before they shared another glance and both got up to leave. When she followed them out the side door Dean grabbed her and pinned her up against the wall.

"Why are you following us?" He demanded.

"Who said I'm following you?" She asked.

"Everywhere we've gone this week, you've been there." He said.

"Exactly, I was there first." She said. "So, who's following who?"

"Are you a hunter?" Sam asked.

She looked at him and paused before she answered. "You don't remember me."

Dean let her go when he realized something else was going on. "Who are you?"

"Take a good look, Sam." She said. "She was my age when she died."

Dean frowned and looked at Sam. He was staring at her, like he had seen a ghost, and in a way he had. "Rosalyn," He said quietly as Dean looked at him for answers. "She's Jess' sister."

She nodded. "It's been a while."

"How did you find us?" Dean asked.

"I traced the location of the last email you sent me," She explained. "Something happened, and I need your help."

"Why didn't you just put that in the email?" He asked.

Dean frowned. "Wait, why have you never told me you kept in touch with her?"

"It never came up," He said before looking back at her. "What do you need?"

"I know what you are, what you do." She said. "You were like a member of our family, Sam. You left so fast after she died and you never came back, but you kept in touch and now I know why. You were checking in on us because you're a hunter."

"How do you know about us?" Dean asked.

"Three weeks ago I came home from college to visit my parents for Jess' ten year anniversary," She paused for a moment. "I found them dead and then FBI agents showed up asking questions about them and about Jess and something didn't feel right, so I followed them."

"They were hunters," Sam said and she nodded. "What killed your parents?"

"Demons," She shrugged with tears in her eyes. "Same thing that killed Jess, right?"

"Roz," Sam said, using her nickname and shaking his head.

"That's how she died, right Sam?" She asked. "Please, I need to know."

"Yes," He nodded. "But I killed that demon."

"Well, now some other demon has it out for the Moore family and I'm the only one left." She said. "I need help, Sam."

Sam looked at Dean with a worried expression and he sighed. "Yeah, come on." Dean said. "We know a place."

Dean and Sam took her back to the bunker. They weren't far from it so it was a short drive, but it was still an awkward one. Dean didn't know what to say about the situation. He had never met the girl but he knew she was important to Sam and he knew she was in danger. Sam was just as lost for words as Dean was. He hadn't seen Rosalyn for ten years and he had no idea what to say to her. He had emailed back and forth with her a few times a year, but just enough to know that they were all safe.

When they reached the bunker, Dean dropped them off and said he was going on a food run. Sam knew it was an excuse to avoid the small talk that was about to happen but he didn't mind. He didn't particularly want to explain to his brother why he never told him about talking to Rosalyn all these years.

"You'll be safe here," Sam explained. "Nothing supernatural can get inside."

"So, it's all real then," She said as she walked around. "The world is full of evil."

Sam frowned, it was a hard thing to learn, and he knew that. "Why didn't you tell me what happened?" He asked. "Those other hunters told you about me, and you knew how to contact me."

"I needed you to see me. I couldn't email you something like that." She said. "I knew that if I did, there'd be a real good chance you'd just disappear. But I knew if I found you, and if you saw me, then you'd help."

He smirked. "You really do look like her, you know?"

"I know," She nodded. "There's no one else, Sam. I have no family left and I won't put my friends in danger against things that I can't even explain to them."

"Roz, it's okay." He said as he approached her and put a hand on her shoulder. "I'm going to help and you can stay here."

She nodded as Dean came through the door carrying bags of food. "I hope you like burgers and beer."

"Who doesn't like a greasy burger and a beer?" She grinned as he handed her the bag and she opened it. "Sweet, you even got the mini apple pies. I love those."

Dean raised his eyebrows at Sam. "She can definitely stay."

A/N: Let me know what you think of this story line in the reviews, and if you'd like it to continue.