Disclaimer: I don't own Grey's, Addison and unfortunately I don't own Derek. A lot of the dialogue in this chapter was taken from an actual Grey's episode, I did not write it, I just thought the scene was too awesome not to include in the story.

A/N: As always thank you for the awesome reviews on the last chapter Addeklover, AiLing, Mony19 and mArTiNaMcBrIdEOx91. I appreciate it so much! I love this chapter for a lot of reasons because A) a certain sexy someone finally makes an appearance B) everyone loves a little backstory and C) for anyone who has seen this scene during the show knows that Kate Walsh and Patrick Dempsey rocked it. They are both some amazingly talented people. I am going home for Thanksgiving on Wednesday so if I don't post before then I hope everyone has a beautiful and safe holiday.

Chapter 5: It Happened One Day

"So you have him in custody correct?" Derek asked getting angrier by the second. When Alex Karev found him sitting alone in an on call room and informed him the police were here, he immediately headed for the waiting room anxious to find out what the hell was going on.

"Not quite sir, after he allegedly attacked your daughter, he ran out into traffic and got hit by a car".

"Allegedly, are you serious?" Derek said scoffing. "What hospital did they take him to?" he asked knowing good and well he wouldn't get a straight answer.

"As you know, they never take victims and suspects to the same hospital and I can't give you that information". Derek looked around the room before catching Mark Sloan out of the corner of his eye. He turned around just in time to watch him come around the corner and throw open the glass doors to the waiting room.

"What the hell is going on?"

"Mark not right now" Derek said looking at the police and then back at him.

"I had to walk into a hospital room and find my niece bruised from head to toe before anybody tells me?"

Derek looked back towards the cops. "We will keep you updated sir, as soon as he has recovered we are taking him in" the police officer said closing an open file he had in his hand.

"Thank you" Derek said, nodded towards the police officer and turned back to Mark.

"This is ridiculous; ever since Addison and I got together you have just booted me out of your whole family. You won't let me talk to your sisters, I didn't come to Thanksgiving last year…but this Derek…you could have at least told me she was here" Mark said throwing his hands in the air. Derek acted like he hadn't heard a word.

"Derek what are you doing?" Mark asked following him towards the nurses' station.

"Olivia" Derek said causing a strawberry blonde to turn around. "I need you to call around to Mercy West as well as Seattle Presbyterian. I am looking for someone that would have been brought in the last hour or so after being hit by a car. I just need his name".

Olivia nodded and Derek walked back towards his daughter's room.

"What the hell are you doing Derek? Leave it to the police" Mark said trailing behind him. Derek didn't say a word he just kept walking. "Listen, I am as pissed as you are and there is nothing more that I want do than rip this guy's throat out but this isn't the way to go. I have seen that look before, it's a lot of anger and a lot of rage and you're going to do something stupid".

Mark put his hand on Derek's shoulder to try and slow him down but Derek knocked it off before throwing open a set of double doors.

Addison and George got Ava all cleaned up and Callie came by and put a cast on her leg, on her wrist, and wrapped her ribs. After she cleared the CT scan by some miracle and her father stopped checking her for neurological problems every minute. She was finally set up in a room and allowed to sleep. As she fell in and out of consciousness she heard her mother, her father and her Uncle come in and out of her room, periodically one of them would speak to her or touch her arm.

After sleeping for almost twenty straight hours Ava awoke to the beeping of a heart monitor and her mother's cold hands on hers. Addison was fast asleep in a nearby chair with her head lying on Ava's bed. Ava slowly lifted her arm and placed her hand on Addison's head causing her to jump. "Hey" she said.

Addison forced a cracked smile and sat up. "Hi sweetie" she said pulling her chair closer to the bed. "How do you feel?" Addison asked already knowing the answer wouldn't be a positive one.

"I'm okay, just sore. It feels like there are weights tied to every single part of my body".

"Let me go get you something for the pain, it will take some of that edge off and hopefully make you feel better. Before Addison could go Ava latched onto her hand.

"Wait" she said attempting to push herself up with her one good hand.

"Mom, I am so sorry".

Addison sat back down in the chair with a confused look on her face. "Sorry for what?"

"For how I have treated you since dad left".

Addison just shook her head. "That's not important right now; we can talk about it later, when your better".

Please just let me get it out…I just want you to know that you didn't deserve it" she said shaking her head. "I put you through hell when I should have been there for you".

"Ava, you had every right in the world to be angry with me"

"You made a mistake, people make mistakes. I should have seen how unhappy you were before then, but I didn't. I was too involved in what I was doing and I let you down".

Addison took in a deep breath. "Ava you have never let me down. There isn't anyone in the whole world I am more proud of. You're strong willed, emotional and so passionate. You reacted to the situation, and I deserved it, I really messed up". Though only a few years old, the memory of that night had been permanently etched into both of their minds.

Ava had been in the lab at school all evening and sighed as she pulled up to the house utterly exhausted. She wasn't supposed to be home from the dorms until tomorrow but she finished up early and figured she would head home and surprise her mother despite being so tired. She couldn't help but smile when she caught sight of her father's car pulling in behind hers.

"Hey kiddo" he said jumping out of his car and grabbing his brief case.

"Hey Dad" she replied wrapping her arm around his waist as he met her in the driveway. "I didn't think I'd get to see you tonight".

"Yeah well, the hospital was over staffed and I didn't have surgeries scheduled so I figured I would take advantage of something that only happened once in a lifetime".

Ava smiled and Derek kissed her forehead, happy to have her home for the weekend. A bolt of lightning cracked in the distance unleashing a downpour. Derek attempted to cover Ava's head with his brief case as they both ran towards the porch.

"See what you did? Came home and brought the weather with you" Derek said jokingly before throwing open the door and walking inside.

Another flash of lighting illuminated the foyer and they realized that all of the lights were off. "Mom?" Ava yelled but only silence filled the house.

"I'll go see if she is in bed already" Derek said and Ava dropped her bags near the stair case and headed into the kitchen. She stopped for a moment and realized something felt different though she couldn't put her finger on it. She grabbed a glass of water and walked back towards the front door when she saw her Uncle Mark leap down the stairs feverishly trying to put his shirt back on and run out into the rain.

The silence was suddenly broken when she heard screaming coming from the hallway. "It was one time, I know that's what people say, I know that's what always gets said. I don't even know how it happened. I don't even know what I was thinking" she heard her mother say hysterically as she followed her father down the dark stained stairs. Ava moved around the kitchen table to catch sight of the big arm full of clothes he was carrying. "He was just here". She quickly ran over to the bottom of the stairs where her mother aggressively grabbed both of her arms. "I am sorry baby, he was just here, he was just here".

Ava immediately knew what had happened but for some reason her mind didn't want to acknowledge it. Her mother just kept running her hands down her cheeks and down her arms apologizing but Ava couldn't say a word.

"You screw my best friend and all you can say was he was just here?" Derek said throwing open the front door. Ava watched as her father threw all of her mother's clothes out onto the sidewalk and into the rain.

"Get out" Derek yelled. "Get out now".

"No" Addison replied.

"Get out of my house now" he shouted. Addison walked towards him and Ava moved to the bottom of the stairs and sat on the step, unable to stand.

Addison looked to Derek and back to Ava in total disbelief, silently pleading for a second chance. "Ava go upstairs" Derek said with a kind of force she had never heard before.

Addison quickly moved to the bottom of the stairs locking her arm on the banister so Ava was unable to get up. "She is not going anywhere and I am not going anywhere I am holding my ground, I'm holding my ground!" she screamed. "We don't quit, we have to work it out".Derek started to move towards her. "What are you doing?" she asked as Derek grabbed her off the stairs and dragged her towards the door.

In a desperate attempt to stay Addison latched hold of Ava's arm and wouldn't let her go. "Don't do this; please don't let him do this Ava. I love you, I love you sweetheart please" she turned back to Derek "Please".

Time stood still for moment as everyone stayed silent. Merely ten minutes ago they had been a perfect family. Now Ava couldn't help but look at the faces of her parents. Her once happy father had turned angry and broken. Her beautiful smiling mother had turn terrified and teary eyed. Before another word was said Derek grabbed Addison's arm and shoved her out the front door slamming it in her face. Ava could hear her mother's sobs and pleading over the pouring rain and it broke her heart with each beat. Her own tears began to fall and she looked up to see her father's tears for the first time in her life. She felt sorry for her mother but her sadness quickly turned to anger. Derek must have caught sight of the change in her eyes because he locked the door and despite Addison's pleading he wrapped his arms around her, kissing her forehead and apologizing profusely. "It will be okay Dad, it's not your fault" she said hugging him. Her emotions fluctuated unsparingly. Her mother's voice pierced through her ears and the image of her standing in the rain surrounded by her clothes killed her.

Derek let go of Ava and walked over to open the door. She walked in soaking wet and wrapped her arms around Derek. "I am sorry, I'm sorry Derek you have to give me a chance to show you how sorry I am." Addison just kept it saying over and over. Ava saw her father place his hand on her back and for a moment it provided her with the slightest bit of hope.

"You stay, I'll get my stuff in the morning" Derek said stoically, pulling her off of him.

"Dad, no" Ava added standing up and walking towards the two of them".

Addison tightly grabbed a hold of both of their hands once more. "Please you have to let me fix this please. We can survive this. We can survive this, Were the Shepherd's, were Addison and Derek" she said dropping Ava's hand and turning towards her husband.

"Were not Addison and Derek anymore" he said regretfully. Ava looked towards Derek for a sign of what his next move was going to be. He began to shake his head and kept his eyes locked on the floor. "I can't look at you. I look at you and I feel nauseous". Ava kept her eyes locked on his as he finally made eye contact with her.

Addison dropped his hand and held back her tears long enough to threaten him. "If you go now, if you go now we are not going to get through this, were not going to get through this Derek, please". Ava's heart fell in her chest because from the look in her father's eyes she already knew that chance was long gone.

When Derek turned and walked out the door Addison didn't move but Ava's mind began reeling. Without thinking she darted past her mother nearly knocking her over. The rain felt cold on her skin and she could barely see out into the street it was coming down so hard. "Dad!" she screamed down towards the street. He turned around before opening up the door and opened his arms and tightly grabbed hold of Ava. "I am sorry Dad, I am so sorry. Don't leave please, make her go, don't leave".

Derek looked at his daughter with sorrow in his eyes. He didn't want to leave her, in fact that's the last thing on earth that wanted to do but he couldn't stay.

"I have to go" he said climbing into his car and slamming the door shut. The image of his daughter in the rear view mirror would haunt him forever.

It felt like she stood in the street for hours. Eventually, soaked to the bone and shaking, she made her way inside. She pushed open the door and her mother was standing in the kitchen doorway. Addison walked over towards Ava with her arms stretched out, hair a mess and her eyes bloodshot red from all of the tears. Addison hugged her with the last of the energy she had left in her body, "I didn't mean to hurt him, I didn't mean to hurt you, I'm sorry". For a moment, just as her father had done, Ava gave in. She imagined her mother pleading for forgiveness. She imagined herself giving in, and hugging her and telling her that everything would be alright. Her heart told her to do just that but her mind told her what her mother did was completely wrong and when that happened the anger took over once more. Ava unwrapped her mother's arms from around her and walked upstairs.

"Ava, please" she said heavily crying once more, her chest heaving so hard for a minute Ava thought she was going to hyperventilate.

Ava turned and looked at Addison letting her own tears fall. "I am sorry Mom, you did this not me" she said hatefully. Once in the hallway she stopped when she was out of Addison's sight. Downstairs she heard her mom fall to the floor as the echoes of her cries filled the house.