Ok, so I have a feeling this little Addison/Amelia story arc may go on a little longer than planned, but the end result will be another baby for Meredith and Derek, so it's a good thing I guess. I wanted to go ahead and post the chapter for you guys since it's been a few days, so enjoy! I'll try to update soon!

Also I forgot to say last chapter that the idea to bring Addison in came from HeroesEmmaLee, so you can all thank her for the fabulous idea. ALSO we are trying to write a fic together, if I can ever get my act together and pm her back (sorry it's taking so long!) so you will have to look out for that soon.

"Derek, are you even listening to me?" Addison asked as Derek just starred at her. He shook his head a little,

"I'm sorry, what did you say?"

"I asked if you were even listening to me," Addison repeated.

"Oh, no, sorry. I was a little distracted by the fact that my ex-wife and baby sister are in my city," he said, sounding a little annoyed. Amelia rolled her eyes,

"Get over it Derek," she said, knowing he was about to freak out, "we're here and we're staying. So let's go save that woman. Where do I scrub in?"

"Oh no, you're not operating," Derek said as if she were crazy.

"Why not, the Chief asked me to help out, so I'm helping out."

"No you're not. This is my patient," he said possessively, kind of like his three year old did when she had to share her dolls.

"Derek," Meredith said warningly, feeling like she really was talking to her three year old instead of her husband. Derek sighed,

"Fine," he relented, "But I take the lead. What I say goes," he said, walking out of the room. Meredith looked at Amelia and Addison,

"Sorry about him, we had an interesting morning," she said before following Derek out of the room, leaving Addison and Amelia by themselves,

"Well this is going to be fun," Amelia said cheerily. Addison just rolled her eyes and left the room as well.

Lexie, Jackson, and Olivia had arrived at the hair salon shortly after leaving the hospital and as soon as they had walked in the door Olivia had started freaking out. She was currently hiding behind Jackson, clutching onto the leg of his scrubs as if her life depended on it and sobbing.

"Olivia, baby, what's wrong?" Lexie asked soothingly, trying to calm down her niece. The three year old sure could scream when she wanted to. Olivia said something, but she was crying so hard that it was completely impossible to understand her. "Are you hurt?" Lexie asked, trying to figure out what was wrong. Olivia shook her head no. "Well then stop crying for a second and tell me what's wrong." Olivia stopped the waterworks for a few seconds and looked at Lexie,

"I don't wanna haircut!" She wailed, beginning to sob again.

"I thought you wanted to surprise your mommy and daddy."

"Noooooooo!" Lexie looked at Jackson, who just shrugged,

"Alright, let's go then Liv, c'mon." Olivia instantly stopped crying as soon as Lexie said they could leave. She stood up and wiped her eyes, turning towards the door. Lexie and Jackson followed her out, apologizing to the employees for the scene the three year old had made.

"Where we goin now?" Olivia asked as they walked down the street.

"I guess we can go get lunch," Jackson suggested, wanting to take a break from eating food from the hospital cafeteria.

"Yay! Lunch!" Olivia began dancing around happily, "lunch, lunch, lunch, lunch," she sang as she ran in circles around the two adults. It was hard to believe that just a few minutes ago she was crying bloody murder. The trio made their way to a small restaurant not far from the hospital that was sure to have chicken fingers, about the only food Olivia would willingly eat at the moment. They were seated quickly and after taking their drinks orders their waiter said.

"What a lovely family." They tried to correct him but he walked away before they could get any words out. Olivia was oblivious to the comment as she colored on her menu and Lexie and Jackson simply exchanged a look and shrugged.

While they were at lunch Derek was discussing the procedure with Amelia, trying to decide the best approach. They had just finished yelling at each other and were standing in an awkward silence when Amelia blurted out,

"So where's that niece of mine?" she asked, talking about Olivia.

"Um, Lexie's watching her. I don't know where they are though, they'll be back in a little while probably," he told her as he examined the scans.

An hour later an exhausted Lexie and Jackson followed a hyped up Olivia into the hospital. The three year old had managed to somehow have extra energy today and was constantly bouncing all over the place. Not only was she incredibly hyper she had also decided that she wasn't going to wear her coat anymore, despite the fact that it was nearly freezing outside and all she had on was a pair of jeans and a sweater. When Lexie tried to put the coat on her niece it had quickly turned into another tantrum similar to the one at the hair salon. She gave up after five minutes of screaming, all of it coming from her niece, and let the little girl walk into the cold air without the coat. Now the two of them followed her into the hospital. They had to stop a few floors down from the surgical floor to pick up some lab results and while Lexie and Jackson were discussing the results they did not notice Olivia slip away from them.

As the finished up Lexie looked around for her niece,

"Olivia? Where'd you go?" Lexie asked worriedly to no one, "Jackson where did she go?"

"I don't know, I thought you had her," he said, panicking. This was not good; they could not loose Olivia, not if they wanted to live anyway.

"I didn't think she would wander off. Meredith is going to kill me!" she said worriedly.

"Ok, calm down, Meredith will not kill you. We just have to find Olivia before Meredith and Derek find out that she's missing," Jackson said, only half joking.

"Where do you think she went? She couldn't have gotten too far, she's only three."

"Ok, you go down that hall and I'll take this one. If you find her page me and I'll page you," Jackson said, taking charge of the situation. Lexie nodded and headed down one hallway while Jackson walked down another.

Meanwhile, Olivia walked down an unfamiliar hallway. She hadn't meant to wander away from Aunt Lexie, but it was boring and she was just gonna look around. But now she was lost and she was feeling a little scared. Not sure what to do, she just kept walking and eventually ended up in a hallway with a big glass window in it. Naturally, the fact that she couldn't see through the window made the three year old more curious than normal and she was determined to see through. Looking around she saw an abandoned rolley chair sitting by the wall. She quickly goes and rolls it under the window then clambers up onto the unsteady chair. She found that by standing on her very tip toes she could just see over the bottom of the window. . Looking in she saw three plastic looking boxes, each one holding a teeny tiny baby inside. They were even smaller than her dollies at home. The three year old was captivated by the tiny babies in the room and stood there starring for a few minutes.

Addison was in the room, attending to the baby boy that had been delivered by C-section while his mother was still in surgery. Addison looked on sadly at the little baby in the incubator before her. He had gone right into surgery after they got him stabilized, but he was born so early that the odds didn't look too good for him. Addison became aware of someone watching her. Looking up to the window she saw a little blonde head peaking over the top. She made sure a nurse was in the room then walked out the door that was next to the window.

"Hi there," she said to Olivia, causing the little girl to jump and almost fall off the chair. Addison caught the small child before she could fall, "You ok?" she asked. Olivia nodded, "That's good. What's your name?" she asked sweetly. Olivia starred at the woman, her mommy and daddy always told her not to talk to people she didn't know, but this woman was a doctor like mommy and daddy so it must be ok.

"Livia," she said shyly, causing Addison to smile. She looked at the little girl closer and noticed she seemed kind of familiar, but couldn't quite place it.

"Hi Olivia, I'm Dr. Montgomery, but you can call me Addison if you want," Olivia nodded, "Where are your mommy and daddy sweetie?" Olivia shrugged,

"I dunno. I gotted lost," she looked back towards the window, "Is that your baby?" she asked, pointing to the room.

"No, that's not my baby. I'm his doctor," Addison explained.

"Oh. He's sick?" Addison looked at the curious little girl,

"A little bit," Addison said gently, "Why don't we get you back to your mom and dad. I bet they're missing you," she said, grabbing Olivia's hand and walking her towards the nurses' station, "Excuse me," she said to the nurse sitting there, "I think this little girl lost her mom and dad. Do you think," before she could continue someone interrupted her,

"Olivia?" The voice said. Addison and Olivia turned towards the voice and Olivia's face lit up. She pulled her hand out of Addison and ran towards the woman.

"Aunt Zona!" she cried happily, launching herself at the pediatric surgeon. Arizona caught the young girl and straightened up, looking at Addison,

"Thank you for finding her," Arizona said gratefully. She had run into a very panicked Lexie after leaving a patients room and quickly offered to help for the little girl. She turned to the nurse, "Can you page Dr. Grey please. Lexie," the nurse nodded in confirmation and Arizona turned to Olivia,

"Why'd you wander off like that?" she asked. Olivia shrugged,

"Aunt Lexie was borin. Then I found babies! They were tiny. She takes care of them," Olivia told Arizona, pointing at Addison in reference to the 'she'. Arizona looked at Addison. She remembered her from when her own daughter was born and she came to help out,

"Dr. Montgomery right?" she asked, making sure she had the name right.

"Yes. And you're, I'm sorry, I forgot your name," she apologized. She had so many patients it was hard to keep track of everyone.

"Arizona Robbins," she supplied.

"Right of course. You're Callie's girlfriend."

"Wife now, actually," Arizona said happily, showing Addison the ring on her left hand. Addison grinned,

"Oh my gosh! Congratulations! That's great." Olivia was feeling a little left out now,

"Zona," she whined, focusing the attention back on her.

"Yes Liv?" Arizona asked exasperatedly, knowing she just wanted attention.

""Where's Aunt Lexie?"

"She's coming to meet us here. She'll be here soon," she said, shifting her to her other hip and focusing on Addison again.

"Are you here for Shepherd's case?" she asked conversationally.

"Yeah I am. We delivered the baby a few hours ago. But the outcome doesn't look good for mom or baby," she said sadly. Arizona frowned and felt tears pool in her eyes. The situation was very similar to the one she had gone through herself four years ago. Olivia looked at her honorary Aunt,

"Don't cry," she said sweetly, gently wiping away the tear that had escaped and giving Arizona a kiss on the cheek. Arizona smiled and hugged the small girl,

"Thanks sweetie," she said. Addison smiled, little kids always managed to make even the worst heartache better with a simple touch or smile. At that moment Lexie burst through the doors they were standing by,

"Olivia!" she cried in relief. Olivia jumped out of Arizona's arms and ran to her Aunt. Lexie scooped her into her arms and held her close to her chest, "Don't ever do that again," she said, kissing her face over and over, "You scared Aunt Lexie. But I'm glad you're safe," she assured her. Jackson was the next one through the doors,

"Oh thank god," he said, sounding very relieved. A lost little kid was never ever a good thing, but it was even worse when the child was basically your family. He hugged Olivia and she was beginning to like all of the attention and managed to pull a few tears in her eyes, "don't cry Liv," he said, holding her closer. She laid her head on his shoulder,

"I want momma," she said pathetically.

"Let's go find your momma," he said, walking towards the doors he just came through, leaving the three other women alone.

"I guess I should go with," Lexie said, turning to follow, now leaving Addison and Arizona alone.

Next chapter will be more Addison/Derek/Meredith interaction along with Addison/Olivia and Amelia/Olivia. How do you think everyone should get along? Drop me a review and let me know! Hope you like it!