A/N: So this is set after 4x15, if Addison had come back a little sooner than she did, and Sam was more of an ass than he actually is, at first, kind of, you'll get the gist I'm sure! It's going to be a long-ish fic and I'm sure I'll frustrate you more than once but trust me guys! Just trust me!

I wish I could lay down beside you
When the day is done
And wake up to your face against the morning sun
But like everything I've ever known, you'll disappear one day
So I'll spend my whole life hiding my heart away

Addison yawned as she climbed out of her car after the drive back from the airport, she took out the keys to Sam's house and walked across to his house, as she entered she slipped off her shoes and coat and walked slowly up the stairs, the door to his bedroom was slightly open and she could see the light of one of the lamps, she froze when she heard a moan that definitely didn't belong to Sam, and then one that did, her heart started to pound in her chest but she didn't stop herself from taking the extra steps to push open his bedroom door as slowly as she could, it felt as if her whole world was spinning as her eyes connected with the two people wrapped around each other in the middle of the bed, thrusting against each other.

"I guess I really know how Derek felt now huh?" she choked out causing Sam and Naomi to leap apart, pulling the sheets up to cover themselves "Oh god, I think I'm going to be sick" she said with a sob, bursting through to Sam's bathroom and leaning over the sink, she retched but nothing came up, with tears blurring her vision she stumbled back out of the bathroom and she moved as quickly as she could down the stairs, ignoring Sam's voice as he called out after her, as she reached the front door she scooped up her shoes and coat and struggled to get the door open, Sam took his chance to slip in front of her.

"Get out of my way" she growled "Get the hell out of my way"

"Addie just, just listen to me" he stuttered.

"I never, ever want to see you again" she spat "You are nothing to me anymore, you are, you are dead to me Sam, you promised me you wouldn't hurt me, you promised me you wouldn't be like them, you promised, you promised" she sobbed, hitting him in the chest.

"I'm so sorry, it just, it just happened, she was just there…"

"No" Addison almost screeched, cutting him off "When this happened to me, when Derek found me and Mark together, I said it was because he was there, I said that to him, and it was true, he was there and Derek never was, it had been years since he was there but, but me? I have always been there Sam, I have always been there for you, even when, even when we weren't together I tried to be there for you and the one time, the one time I need you" she said tearfully "The one time I need you, truly need you, I find you in bed with, with her, of all the people why did it have to be her?"

"I am so so sorry" he said with a slight whisper "Please just don't, don't leave me, please"

"I'm already gone" she whispered back, she shoved him out of the way and stormed over to her own house, as she slammed the door behind her Amelia skidded into her view.

"Oh" she said clutching her chest a little "It's just you….what's wrong?" she frowned as she noticed the tears streaming down her face.

"Did you know she was there?" she asked tearfully "Naomi?"

"Well, yeah, they're looking after Olivia for the weekend"

"Oh god" Addison choked out "They did it with Olivia in the next room?"

"Did what Addie?" Amelia asked worriedly.

"Please don't make me say it" she whispered tearfully "I keep seeing it and I can't, I can't say it…"

"Oh Addison" Amelia said rushing forward and pulling her into a tight hug "It's ok, it's ok, I'll make them pay alright? I will make them pay for this"

"Please don't" Addison sobbed "Please don't do anything stupid, I don't, I don't think I can be alone right now, please"

"Ok" Amelia whispered "It's ok, I'm not going anywhere, what, what do you want to do? I could get you some wine or…."

"No" Addison said instantly "No just, just promise me you won't do anything stupid"

"I promise Addie" she said softly "Why don't you try and get some sleep?"

"I'll try" Addison sniffled "I can't believe he did that Amelia, I really can't"

"I know" Amelia sighed "I'm so sorry"

"I don't know what to do" she said tearfully.

"Let's just, sleep on it" Amelia said quietly "Come on" she took Addison's hand and led her up the stairs where they both fell to sleep in Addison's bed.

~x~

"Addison" Amelia said quietly as she shook her arm.

"Hmm, what?" Addison mumbled tiredly.

"I've gotta go to work" she sighed "I won't stay the whole day, but I have to go in…"

"Go" Addison yawned "I'll be fine, I swear just, promise me you'll control yourself"

"I promise I'll try" Amelia said with a slight laugh.

"I guess that's the best I'm gonna get huh?" Addison said with a small smirk.

"Do you know what you're gonna do?"

"I, all I know is right now, I don't want to see either of them, other than that I don't know what I'm doing"

"I'll call you later" Amelia said squeezing her hand "Bye Addie"

"Bye" Addison said with a small smile, as soon as the bedroom door was closed she rolled over and pulled the covers up before falling back to sleep.

~x~

"Morning" Amelia said as she walked into the conference room and took a seat next to Charlotte.

"Morning" everyone replied.

"Isn't Addison supposed to be back today?" Violet asked.

"Addison won't be coming in today" Amelia said simply, her eyes glancing briefly to Sam's.

"Is everything ok?" Sheldon asked.

"Sure it is" Amelia nodded.

"Then why is there tension?" Cooper asked as he noticed the tense looks between Amelia, Sam and Naomi.

"Oh I don't know Cooper, I think maybe Sam could answer that question for you, or maybe you would do the honour Naomi, because I know you're sure as hell not going to make me say it" Amelia said with a sharp laugh.

"Ok seriously, what's going on?" Pete asked.

"You have no right to say anything…." Naomi said to Amelia.

"No right?" Amelia laughed as she stood up "No right! Were you the one awake half the night holding on to your best friend while she sobbed her heart out? No, you were the one fucking the man she loves" she spat "You do not get to tell me my rights, you do not get to tell me to do anything Naomi, you don't deserve anything from me, you have no idea how hard it is for me not to climb over this table and beat the crap out of you so don't you dare even start with me"

"Amelia, stop" Sam said shakily "Just stop"

"That's it Sam, jump in to rescue her" Amelia said sarcastically "Y'know what, screw this, I'm going to the hospital to find a surgery because if I don't cut something, well I'd guard your manhood asshole"

"Wait, wait, wait" Pete said firmly as Amelia started to walk away "Are you seriously saying Addison found them…."

"She came home early from Connecticut because she missed him" Amelia said quietly "Because she'd spent the whole week clearing out her mothers stuff and, making sure her father and brother didn't drink themselves to death, she came home because she wanted to climb into bed with the man she loves and have him hold her like he promised he would, she wanted to come home to him and when she opened his bedroom door, she found her with her legs wrapped around him, so yeah, I am seriously saying that Addison found them together, and I hope they both realise that they will never be forgiven for that" as she finished her sentence with a breath Amelia turned again and walked out of the now silent room, Pete slowly stood up and took the steps towards Sam, before anyone could breathe he pulled him from his chair and punched him in the jaw before storming from the room.

"You deserved that" Violet spat as she followed him, Charlotte, Cooper and Sheldon all followed after her, not even glancing to Sam or Naomi who was sobbing into her hands.

"What did we do?" she choked out "They all hate us"

"I think it's more me they have the problem with" Sam mumbled as he rubbed his jaw.

"You, you need to talk to her" Naomi sniffled "You have to talk to her"

"And say what Naomi!" he exclaimed "I apologised, what else can I say!"

"I don't know" she whispered.

"Well neither do I" Sam said quietly as he walked out of the room.

~x~

Addison sat on her sofa sipping on her coffee, listening to the sounds of the waves coming from outside, she turned her head when she heard the front door open and close "Amelia?" she called out.

"No it's, it's me" Sam said quietly as he moved into the living room.

"Get out" she said shakily "Get the hell out of my house"

"I just want to talk…."

"I don't want to hear what you have to say" she spat, she stood and put her coffee on the table in front of her, crossing her arms across her chest defensively "Get. Out."

"Addie please just listen to me, I know what I did was wrong, I know it, I can't even believe that I did that, I am so, so sorry, I'm not expecting you to forgive me but, you can't give up on us…."

"I didn't give up on us" she said tearfully "You gave up on us the minute you took her to your bedroom, now please just, get out of my house" she sighed with defeat "I want my keys back, and anything you have over there that's mine, leave it on my deck, if I come back to work you will not speak to me unless it's about a patient, and you can tell Naomi that if she even dares to breathe a word to me, she will not know what's hit her, ok?"

"Addie please…."

"I said ok?"

"Ok" he sighed "Ok"

"I want my keys back"

He took the keys from his pocket and put them on the side, she turned away from him and Sam took a moment before leaving the house.

Chapter 2 to follow….