Disclaimer: I do not own all characters, all characters from Grey's Anatomy/Private Practice belong to Shonda Rhimes and other creators!

Not beta read.

It was a normal night, no different than the ones that had become routine. My mom probably thought I was asleep and I'm pretty sure my dad forgot I was even there. The whole scenario could have been completely different if they'd know I could hear every word and see every movement, but odds are it would have turned out the same way. I know they both would have acted differently afterwards though, Mom would feel embarrassed every time she looked at me and Dad would be much more open with his disgust towards Mom in front of me. That night, that one rainy night in New York City, would change our lives forever.

I got home from school around 3:45 and got started on my homework. My parents have always been proud of me for excelling in advanced classes but the homework has never been the best. I finished about four hours later and wandered down to the kitchen for food. I saw a note from Mom lying on the counter, Be home after 9, leftovers in the fridge –Mom.

I grabbed a few slices of pizza and went to my room eat and take a long shower. When I stepped out of the shower I heard laughter coming from downstairs, and voices, I heard a man's voice in addition to my mom's.

"Addie, let's go upstairs," I recognized my Uncle Mark's voice.

"Mark, I want some wine, let's stay down here."

"Come on, Addie"

"Mark!"

"Just because we go upstairs doesn't mean we'll have sex, Addison, I know you're married, Derek is my best friend," I could almost hear my mom rolling her eyes as I did the same, Mark's sexual talk no longer phased me.

"It's you, Mark Sloan, you can't go in a room with a bed and not have sex."

"I take offense to that, Addison."

"Besides Adaline is upstairs and I don't want to wake her up if we haven't already," I heard my mom reasoning and glanced at the clock, realizing I probably should get to bed.

I heard Mark mutter a few words of agreement and rolled over, falling asleep. A couple hours later I was woken by the front door of the brownstone slamming loudly. I heard my Dad coming up the stairs for the first time in days and muffled noises from the master. What I would hear next would be life-altering events unfolding.

7 years ago

"Mommy," I asked, "Can Julie live at our house?"

"Julie as in your friend, Julie, from school?"

"Yeah."

"Why?" she asked.

"Her house is loud at night, she said her mommy and daddy are getting dewor-"

"Divorced?"

"Yeah..." I paused, "Mommy are you and Daddy ever going to get divorced?"

"No," she responded, "Daddy and I can get past anything we're Addison-and-Derek."

"Daddy said it was Derek-and-Addison," I told her.

"He did, did he?" she laughed before telling me that Julie could not live with us but she could spend the night if she wanted.

Present

I guess I should describe myself some. I'm 14 and in the eighth grade. I'm tall, like my mom, and have red hair, like my mom. I shared my mom's love of shopping, clothes and shoes and could spend all day doing stuff with her that Dad hated. But I loved the outdoors just like my dad and we would go on camping trips or day-long hikes in a park outside of the city without Mom. I had my dad's light blue eyes and, apparently, his confidence too. I've been told over and over again that I was the perfect mix of my two parents, I had their best characteristics in me.

My parents got married the month before their third year of med school and had me a few years later. As I grew up my parents grew up too… as surgeons. While I spent my days at preschool and daycare they spent theirs as interns at the hospital doing grunt work for residents and attendings. By the time I got to middle school they were the attendings and with that world-class surgeons. People would ask how they did it, raise a child and establish their positions as world renowned surgeons at the same time. They always said they were "Addison-and-Derek" that they could overcome anything. I doubted they could overcome this.

"Get out now," Dad said and I cracked open the door to my room taking in the scene in the hallway. Mark was pulling on clothes in a hurry and running out of th house, Dad was entering his bedroom which I had to assume Mom was in and, oh God, I hoped she was wearing clothes, that she could disprove what I thought just happened but judging from Dad's anger and the conversation I began hearing I was right.

"Derek. Derek listen to me," Mom begged, "Derek, you can't do this. Derek, we have to—we have to talk about this."

"No, we don't."

"You have to give me a chance to explain. What are you doing? What are you doing with my clothes , Derek?!" they entered the hallway and my view, "It was one time! I know that's what people say. I know that's what always gets said, but it's—I don't even know how it happened. I don't know what I was thinking," they were almost down the stairs now and I could barely see them, "He was just—he was just here."

"He was just here. You screw my best friend and all you can say," Dad opened the front door, throwing the clothes he'd been holding outside into the rain, " 'He was just here'? Get out."

"No."

"Get out."

"No. No, I'm not going. We're gonna just talk about this. We're gonna discuss this."

"GET OUT OF MY HOSE NOW!" Mom shrunk down and I creeped further out of my room to get a better view of what was going on.

"No. No. I'm holding my ground."

"Let's go!"

"I am holding my ground. We don't quit!" my mother was crying and yelling at the same time as my father physically lifted her up and removed her from the house, "We have to work—"

"Get out."

"What are you doing? Derek! No!" her voice was not quite as loud now, with the door separating her from everyone inside of the house. But you could still hear the crying, "Please. Please. Please. Derek. Please. Please. Please. Please."

The door creakily swung open revealing a hysterical Mom, "I'm sorry, I'm sorry. You have to give me a chance. You have to give me a chance to show you how sorry I am," as they hugged I began to retreat to my room, "I'm sorry, okay? Okay?" now he was pushing her out of the embrace, I didn't move.

As Mom's breathing began it's return back to normal and the situation appeared to be dying down Dad began to speak rushed, "I'm gonna go you stay I'll get my clothes in the morning."

"No, no, no, no, no. We can survive this. Derek… we can survive this. We're—we're Addison and Derek."

"I can't look at you. I look at you, and I feel nauseous. I just… We're not Derek and Addison anymore."

"If you go now… If you go now… We are not gonna get through this. If you go now… We don't have a chance. We don't have a chance…" Mom's voice started to change back to a cry, a plea, once again, "If you go now. If you go…"

It was with that that my dad opened the door and walked out, not just on my mom but also on me, on our family, on any normalcy that we could hope for in days to come. With that he left his life behind and he left ours destroyed; our lives, our routine, they were left in shambles. I knew that night was my mom's lowest point in life, her rock bottom; if she could she would go back and change that night, she would never sleep with Mark. But if Dad could go back, I don't know if he would do anything differently, if he would change a thing.

A/N: I know I went with the overused Addek had a child thing but I felt like I had lots of ideas so please just hang in there. I stretched out Addison and Derek's marriage as well to make their child in wedlock and a teenager. Also, this is my first story so please review with any critiques, comments or questions; they will be much appreciated!