This is based on the TV show in Season 2. The episode after Isobel showed up at their door. Please Review!

Elena's POV
Elena walked downstairs. Jeremy was in the kitchen having some coffee.
"Have you seen Jenna?" Elena asked. Since Isobel came back last night, Jenna was having a difficult time.
"Yeah."
"Really?" Elena asked as she looked up from pouring her coffee.
"Yeah umm... she said she was going to the campus."
"Great! I'll be at the campus and try to explain everything to her." Elena picked up her jacket and left.

Elizabeth's POV
Elizabeth watched as Elena got into her car. It was amazing. It was like looking in the mirror. When Elena drove out of sight, Elizabeth started to walk down the sidewalk to her car. If I parked at their house, they would've known someone was there. Then I saw a guy coming up. He was cute and had a mysterious look. He looked familiar. Not that I had seen him before, but in a way that I knew him. Like I read about him or someone described him so well I knew it was him. Now I realized who it was. It was Stefan. I didn't know what to do. I can't let him see me! But he probably already did and was walking right up to me.
"Hey Elena!" he said as he hugged me tight, "How are you?" he thought that I was Elena! I didn't know what to do or say though.
"Umm...hey! Not so good. Jenna's still freaked out about Isobel." Stefan pulled apart. Then he looked at me. Before I knew what was happening he grabbed me by the neck.
"Katherine!"
"No! I'm...not-" He was choking me. I gasped for air. Then he let go of me.
"You're not Katherine." he said. He could tell I wasn't, "But you can't be Elena."
"I'm...I'm not either of them," I said slowly catching my breath.
"What?" he asked confused.
"Meet me at The Grill. Come at 3:00. You should bring Damon," I said and walked away. I went as fast as I could and got in my car.

Stefan's POV
"What do you mean it wasn't Katherine or Elena?" Damon asked.
"I knew it wasn't Elena by the way she hugged me. It wasn't Katherine though. She didn't act like her."
"It's Katherine. The manipulative bitch! She was probably just acting."
"She said to meet her at The Grill and to bring you."
"I would've come anyway," Damon said and got his jacket.

Elizabeth's POV
I was sitting down waiting for my coffee so nervous. What would I say? Could I trust them? Elena did. But that was different.
I saw Stefan walk in. He was cute, but the guy walking behind him looked older and handsome. It was Damon. I could tell. There was something about his face that made me feel different.
Stefan whispered something to Damon and pointed at me. They walked over to me.
"Thank you for coming," I started.
As much as Damon was hot, he looked like he wanted to rip my heart out. Then his face changed into less hatred but confusion.
"Yep. She's not Elena and especially Katherine. But the question is-who are you?" Damon said as he sat down across from me. Stefan took a seat next to him.
"I'm Elizabeth. Elizabeth Golmert. I told you to come here to ask any questions. I'll try to answer them."
"Why do you look like Elena and Katherine?" Damon asked first.
"I believe I'm also a doppelganger of Katherine."
"What are you doing here?" Stefan asked.
"I'm watching out for Elena."
"Why do you care?" Damon said.
"She's family. I heard about Klaus and I came into town a few days ago. I've just been watching out for her. I honestly care about Elena and her safety."
"So I suppose you're like her great, great grandma or something," Damon said.
"I want to help you. I'm not your enemy. Klaus is. We all want Elena to live and for Klaus to die."
"How do we know you're not lying?"
"I wouldn't be here if I was lying."
"Well I believe you." Stefan said.
"I believe you for now." Damon said.
"Can you do me a favor and not tell Elena about me. I'll tell her when I'm ready. I just wanna make sure she finds out from me rather than either of you."
"Well I won't tell her, but Mr. Gossip loves sharing secrets with his girlfriend." Damon teased.
"I won't tell her. Even if I wanted to I don't know enough." Stefan assured.
"Thank you. Both of you." I smiled a little.