Pairing: Elijah/Thea is endgame. I may put her with others in the meantime, depending on how the story goes, but this story came about because I put my other story's OC with Klaus. And I love both these brothers and they do not like to share, so...

Timing: The prologue is pre-series. Chapter One will start in the middle of Season two.

I don't anything, just Thea.

Rated M for language and sex

"I'm leaving," said Greta. "With Klaus."

Thea blinked in surprise. When Greta had called and said she needed to speak with Thea as soon as possible, this isn't what she had expected. Now she knew why Greta had insisted on meeting in a public spot. She hadn't wanted Thea to make a scene. No doubt that was Klaus' idea.

Thea tilted her head. "What do you mean, you're leaving? It's the middle of the semester."

"He says it's time to move on," answered Greta. "And he wants me to go with him."

Greta said that last part with a smile on her face.

Thea inwardly cringed. She knew she should have tried harder to stop Greta from working with Klaus. But it had made Greta so happy. And Thea wanted her little sister happy.

"You're only a freshmen," said Thea. "You have your whole life ahead of you. Don't drop everything just to go off with some vampire."

She tried, and failed, to keep the disdain out of her voice.

Greta scoffed. "Klaus isn't just some vampire. He's an Original. He's going to change the world once he breaks the curse."

Thea's eyes hardened. "He's never going to break the curse. You're wasting your time."

Greta looked angry. "I'll find a way. Klaus believes in me."

Thea sighed, not wanting to argue. "Don't go, Greta. Please. At least finish school."

"Klaus needs my help now," said Greta.

"He's going to live forever, he can wait!"

"He said you'd try to stop me," said Greta, getting up from the café table.

"You shouldn't listen to Klaus," Thea answered angrily, getting up as well. "He's just using you to get what he wants."

Greta's eyes flashed angrily. "You're wrong. Klaus cares about me."

"Greta, come on," said Thea, her tone softening. "Klaus doesn't care about anything except breaking the curse."

"Why can't you be happy for me?" asked Greta. "Being in Klaus' inner circle is a great honor."

Honor is not what she would call it.

"Please don't go," pleaded Thea.

Greta shook her head. "You can't stop me."

Thea pursed her lips. She could maybe force Greta to stay. She could call on the coven and they could keep Greta from leaving. But what would be the point of that?

Greta was an adult, capable of making her own choices. Thea just hoped her sister realized what a mistake following Klaus was, before it was too late.

"You call me the second there's trouble," said Thea, looking Greta in the eye. "Do you understand? Original or not, I will do whatever it takes to save you."

Greta rolled her eyes. "I won't need saving. I never understood what you have against Klaus."

"Other than the fact that he's an evil vampire?" asked Thea, shaking her head.

"He's not evil," said Greta. "He's misunderstood. He's always been nice to us."

Thea clenched her teeth, not wanting to have this same argument again, especially if Greta was going away.

"Just promise me you'll keep in touch, okay?"

Greta nodded. "Sure."

She got up from the café table and threw some money down.

"I have to go," she said. "The plane leaves in an hour."

"What?" exclaimed Thea. "You're leaving now?"

"It was a last minute thing," said Greta, moving forward to hug a surprised Thea. "I'll call you soon."

"Okay..." Thea trailed off, too stunned to respond.

Greta released her and grabbed her purse.

"I'm not going away forever," said Greta, shaking her head at Thea's frown. "I'll see you soon."

Thea frowned and watched Greta walk away, down the sidewalk. She plopped back down in her chair, putting her head in her hands. What the hell had just happened? What was she going to tell her father? Her brother, Luka?

"Quite magnanimous of you," came a voice from behind her.

Thea shot up, turning around and putting one hand up toward the newcomer.

"What do you want?" Thea hissed, looking at Klaus with an unfriendly glance.

"Relax, love," said Klaus with a hint of a smirk. "I came to intervene if necessary, but I see I needn't have worried."

"Why are you doing this?" asked Thea. "Why are you taking her away?"

"I cannot stay here any longer," said Klaus, not elaborating. "I need my most trusted associates to accompany me."

He looked hard at her.

"It does pain me somewhat that you are not among them," he said, tilting his head.

Thea clenched her jaw, letting loose some of the anger she'd felt at Greta's decision, but that she hadn't wanted to unleash on her sister.

"I will never help you," Thea spat.

Klaus chuckled a little at her anger. "Never say never."

Thea bristled at his amusement. "Let's get one thing straight, Klaus. Original or not. Vampire or not. If you hurt my sister, I will find a way to end you."

Klaus just kept smirking. "As always, your charm is without equal."

And then he disappeared.

Thea sighed and sat back down in her chair and reached for her coffee, that was now cold. She stared in the direction that Greta had retreated, hoping she had made the right choice in letting her go.

Of course, if Thea had known it would be another two years before she'd see her sister again, and that the decision Greta made would change her family's lives forever, she probably would have dragged a bound and gagged Greta all the way home to Louisiana.

A/N: Let me know what you think so far! Next chapter will be a time jump to season two, but I will be incorporating flashbacks once Thea makes her way to Mystic Falls (you can probably tell there's more to the story with how Greta ended up with Klaus).