Disclaimer: All characters from GA are NOT my own creations! Ok? There! I admit it!

A/N: THE SECRET REVEALED! dun dun dun...a nice flashback. I love those things!

All five interns were eagerly awaiting Dr. Shepherd's arrival to the hospital. As they sat in the outdoor courtyard, they tried to look nonchalant, hoping that he would get there on time so they wouldn't have to be late for work. This was getting very boring, until they heard a sound. Three sounds, to be exact.

"The charity cases are here," announced Alex monotonously.

Brianna, Scott, and Ivy were soon right in front of the interns.

"What are you doing?" asked Ivy, very bluntly. "Are you supposed to be here?"

"I wouldn't say that if I were you," said George, "because I can just as easily ask Dr. Bailey to assign you to Alex and I today."

Ivy fell silent and looked like she was mentally kicking herself.

"Dude, we're all checked in and stuff, so..." Scott started.

The interns quickly did a mental eye-huddle, and a decision was made.

"Why don't you sit with us?" asked Christina, in mock-cheerfulness.

coughMcDreamycough was heard from George's direction. Izzie slipped her hand under the table and pressed the "test" button on her beeper. Everyone jumped. She looked down.

"Scott, I'm getting a page from Olivia. Ivy, you're on coffee duty. I think you should go."

They were gone with a "Crap, I forgot to unplug her phone." from Scott.

"You might want to page Olivia. You know, to let her know why her cousin is going to be running up to her for no apparent reason," said Meredith.

Izzie grumbled and obeyed.

"Good morning, interns...and Brianna! Fancy seeing you here," he said, making meaningful "why is she here" eye contact with Meredith.

Brianna took one look at the entire thing and knew. "You think that Addison might be my mother," she said quickly. "I was thinking the same thing, so whatever it is you want to say, say it."

Derek was taken by surprise. Brianna hoped she wasn't blushing. "I have these," she said, placing some papers onto the table. "I got them last night. They might explain something. I haven't looked at them yet."

Derek nodded, amazed at this girl's sharpness.

Flashback
"I've never told anyone this before," said Addison. "I've never had any reason to, and I've never really wanted to."

Derek nodded. Addison was sitting up against the headboard. Derek lay down on his stomach in front of her, hand resting on his chin, like a child listening to a story.

"You think that Brianna is my daughter. I'm not stupid. The thought has been in the back of everyone's mind, especially since we have a grapevine that stretches the length of the country. Well, let me tell you something."

She paused and pushed her hair up out of her face.

"Brianna isn't my daughter."

Derek looked up at Addison, trying very hard to keep his face neutral. Rule #2 when trying to get Addi to tell you something: Do not speak with your face. It's the same as drawing conclusions.

"Lydia Davis is married to Luke Davis. Her maiden name is Montgomery. Lydia Montgomery is my sister, which makes Brianna my niece. And I didn't know that until she showed up yesterday evening."

Addison's eyes filled up with tears. Derek didn't touch her. Rule #3: No interruptions. At all. She had to have her space.

"Lydia was the black sheep in our family. My parents and her didn't mix. They had an argument one night, and she left. She's older than me by one year. I never heard from her again. We were forbidden to speak about her."

Now Addison's head was down on the bed, her head in her hands.

"The...the night she left, I followed her outside. I asked her what she was going to do, and she screamed that she didn't know. I gave her enough money for a cab. She had a job. I wasn't worried about her. I told her that I loved her, no matter what they said, and she told me that I would always be her little sister. She left."

She was sobbing now. Derek waited patiently for her to get herself together. Addison sat up again. She wasn't done.

"Fifteen years ago I got a call at work from Lydia, asking if I could come and see her at her apartment. I went, and she introduced me to her husband. She told me that they were having trouble conceiving, and that they needed a surrogate. She asked me if I would do it and I of course, I said yes. I carried Brianna full-term."

She paused and took a deep breath. Derek knew that this was the complication.

"My parents found out, of course. They knew I'd never get pregnant like that. They put two and two together and they demanded to know where she was. When I didn't tell them, they traced my phone. I just never knew that they hated her so much."

Derek waited for her to stop crying. When she did, she looked him straight in the eye.

"She thought that I told them. After I had Brianna, she left. Just left, like that. She left me a note. I have it somewhere, but I don't need it because it was 3 words: Betrayal. Never again. And that was the last time that I saw her. She didn't even listen when I tried to tell her that I'd never do that to her. You'd think that I would count for something, you know?"

Addison curled up into a little ball and cried. She was done. Derek sat next to her and she leaned sideways on his shoulder. He awkwardly patted her head and arm until she fell asleep. Derek slowly slid off the bed until she was lying down, eyes puffy, face red.

All five interns sat, stunned into silence. Brianna slowly took the papers and pushed them into the middle of the table.

"It's true," she said in a small, quivering voice. "It's all right here."

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