Thanks everyone for the amazing reviews and kind words. Hopefully you've all started to recover from the season finale by reading lots of fluffy fanfics! That being said, here's the next chapter. Enjoy! :)

Arizona's POV

Callie was going to kill her, but she couldn't keep secrets from Tim any longer. She'd been a mess for the last week, and she was almost certain secret-keeping was to blame for the B she'd gotten on her biology test. So here she was, in Tim's car, waiting for him to finish gassing up, twirling her thumbs and trying to find a nonchalant way to say "there's a runaway in our treehouse, and I really like her!". Because she really did like Callie. She understood Callie, and Callie understood her. In a way that only people who had experienced a life like they had could. But it was more than that. She liked Callie in a way that made her stomach turn and her skin goose bump. And she found that for the first time in her life, all of her thoughts were consumed by Callie. It was a foreign feeling, but she welcomed it in, because the thought of Callie made her feel warm and delighted. And, if she was being honest, those curves of hers were insanely sexy.

"Who you daydreaming about?" Tim's voice interrupted, and Arizona felt her face get hot with embarrassment.

"No one!" She shot back, very unconvincingly. Tim laughed and raised his eyebrows in a yeah-right kind of way, and put the keys in the ignition. The car roared to life and Arizona bit her lip. Now or never.

"So, I have to tell you something." She said casually, and Tim jerked the car back into park, having barely moved ten feet.

"Yes! I knew you'd break!" He shouted, quietening when Arizona glared at him.

"I need you to take this seriously!" Arizona said, and Tim's face changed from one of excitement to one of extreme seriousness.

"I promise."

"This isn't one of those little things. I mean, it's not that big, but like, it's sort of big at the same time. It won't change our lives, well, I mean, it sort of can. It might be-"

Tim interrupted her with an index finger to his mouth.

"Shh. Arizona, chill out. You're rambling. Just spit it out."

"There's a runaway living in our treehouse and I really like her and I've been sneaking food out of the kitchen and bringing it to her."

Tim's eyebrows knitted together in total confusion and he signaled for her to stop again.

"Woah, I'm sorry, what?"

"There's a runaway living in our-"

"I got that part Arizona, I'm not deaf. Just, what?"

Arizona could see him processing, so she gave him a second before she decided to continue.

"Her name is Callie Torres. She's a year older than me, so a year younger than you. She's on the run. She's sweet and kind, and she gets me."

I don't think the fact that she gets me is necessary information in this situation, Arizona reminded herself.

"You've been keeping a person in our treehouse? Like a human..pet?" Tim said, and Arizona laughed at the ridiculousness of the sentence.

"No, not like a pet! Like a human being who needs help because she's had every single terrible thing thrown at her."

"Arizona, she can't live in our treehouse! We have to call someone to help her out."

Arizona Robbins was a calm person, a kind person. But not when someone wasn't understanding her. And if she'd learnt anything about having a sibling, it was that you could snap at them and they'd still love you. So she snapped.

"No! Do not do that. You can't call someone, because then she's going to be sent home, or to foster care, or worse, she'll end up on welfare somewhere working a part time job trying to come up with rent money!"

Tim sighed.

"Yeah, but what's she gonna do, live in our treehouse forever? You know she can't do that, Arizona."

"I know Tim. I haven't figured it all out. But I can't turn her in."

"Why not?"

Tears always hit Arizona at the most awful times. And now was one of those moments.

"Because that could very easily be me!"

The silence in the car seems to stretch on forever, but Tim looks like he's finally understanding her.

"Listen, I'll never hold the fact that you got a good life against you. I can't, I wish everyone got amazing parents. But people like Callie and I? We got dealt shit. We got dealt addicted mom's and runaway dad's. We didn't do anything to deserve it! We were just born into it. The only difference between me and Callie is that I snapped earlier, and that I ended up with you guys. What if I'd stuck around longer? What if I'd run away last week instead of six years ago?"

Arizona can tell she's won the battle, because Tim is nodding, but she can't stop, not yet.

"Imagine that it was me in that treehouse. Just, imagine it."

Tim nods, and wipes tears from Arizona's eyes with a big smile that comforts her.

"I'm in."

Matching smiles split onto their faces as Tim pulls Arizona into a crushing hug.

"Thank you Timmy."

Callies POV

It's been a little over a week since Arizona first found her in the treehouse, and given that she's on the run with no future prospects, it's been a wonderful week. On the days Arizona was in school, Callie roamed the woods, collecting berries and cutting a path from Arizona's house to the treehouse. She tried to keep as busy as she could when Arizona was away, but she found herself thinking a lot. Thinking about Arizona, mostly. She was without a doubt the kindest, warmest, and most real person Callie had ever met. And gosh, those eyes. There was something about her, and that ridiculous dimpled smile that cracked every wall she'd put up and left her wide open and raw. It was both terrifying and exhilarating. It terrified her because she was terrified to care. She'd learnt that caring meant opening yourself up to the possibility to be hurt, to be let down. And her past history of terrible let downs made her desperate never to be vulnerable. But Arizona, Arizona made her want to throw down her walls and burst out and take risks despite any kind of pain that might come from it. It was reckless and thoughtless, she hated it, but she couldn't help it. She wasn't even sure that she wanted to help it. She was sure she should have been more terrified about having these feelings for another person, but it wasn't terrifying. It felt rather simple.

"Stop whining, look! She cleared the path because you were too busy making out with your girlfriend to do it! So be nice."

Arizona's voice floats up from down below, and Callie races to the door in confusion. Who the hell is she talking to?

Her question is answered when she throws the door open and sets eyes on a tall, muscular blonde following closely behind. She doesn't have to ask to know who it is. Tim looks exactly like what she pictured in her head when Arizona described him. Tall, muscular, blonde with freckles and deep blue eyes. If she didn't know Arizona was adopted, she'd have sworn they were siblings. Matching blue eyes, blonde hair, and pale skin. The only difference between them is Tim's freckles and straight hair. Callie goes straight into panic mode, because she didn't expect to meet anyone other than Arizona anytime soon.

"Wait here, I'll be out soon." She hears Arizona say from the bottom of the treehouse, and seconds later a blonde head pops through the doorway. She's in jean shorts and a blue tank top, and it feels impossible to not stare. Her blue eyes are apologetic the second they lock onto Callie's, and Callie can't help but smile.

"Hey." She says, and it's breathless and quiet, because that's the effect Arizona has on her.

"Hey." Arizona answers, and for a second they are trapped in the most intense eye contact. It takes a shout from Tim to break them out of the moment, Arizona shaking her head as if to clear it.

"So I take it that's Tim?" Callie comments, trying to keep herself in check. She's terrified, and she knows that Arizona can see it under her calm exterior. Every extra person that she meets is a new person that could sell her out. Another person that could call the cops or child services. Every single person is a new link to the outside world she so desperately fled from weeks ago.

"Yes, Calliope, I am so so sorry, but I couldn't keep it secret anymore."

Arizona's blue eyes are brought to life by her blue shirt, and Callie finds that she can't even muster up the energy to be upset. Is she nervous? Yes. But angry? No. Not at Arizona. Not when those amazing blue eyes are so full of kindness and compassion. When Callie tunes back in, she realizes Arizona is still rambling, and it's both adorable and endearing at the same time.

"Arizona, it's okay. I understand."

Callie is rewarded with the most magnificent dimpled smile. Followed by a very unexpected hug. Before she's processed the smell of Arizona's hair and the feeling of her body against her, the hug is over. Then a soft hand reaches out and grabs her own, and she's being pulled towards the ladder. When she climbs to the bottom, there stands Tim. He stands there, almost awkwardly, having some sort of sibling conversation without the use of words with Arizona, who's glaring at him.

"Um, hello." He says awkwardly, covering it up with a massive grin.

"Tim, are you kidding me? You have every girl at school drooling over your feet and the best you've got is "um, hello?" Arizona chastises, and Callie can't help but laugh at the look Tim throws his sister.

"To be fair, this is my first runaway hiding out in my childhood treehouse!" He replies, and Arizona looks shocked and appalled, and punches him in the arm. He mocks pain and shrugs his shoulders, smiling at Callie.

"Oh, well then you've been missing out, we're the best kind." Callie comments, throwing a wink at Tim, who laughs and wraps a long arm around his sister.

"See, sis? She can take it." Tim comments, and Arizona's bottom lip sticks out in the most adorable pout in the world. "Yeah, that face? Won my parents over in like 2 seconds flat. Meanwhile I'm over here with my ugly mutt just trying to get some attention!"

His tone is light and joking, and Callie can't help but like him. She can see the protectiveness over Arizona already, and she likes that. She also likes the way he jokes around with her. It makes her feel a little less like a runaway and a little more like a friend or a family member.

"Well, you two chat. I have to pop into the house quickly before Mom and Dad get home from work and get some supper for Callie." Arizona says, taking the time to stop and give Tim the "be good" look.

He smiles at her innocently, and she rolls her eyes and stomps off in the direction of the house, taking a second to smile at Callie before she disappears.

"So, you're living in my treehouse, huh?" Tim says, and they both laugh as soon a the sentence leaves his mouth.

"It would appear so. By the way, I'm sorry that Arizona had to lie to you, I know she hates doing that."

Tim sits down on the forest floor, cross legged, pulling bark from a branch.

"No, it's okay. I get it. She needs the practice anyway, she's a terrible liar."

They share another laugh, and then they sit in silence. Tim continues to peel bark off the branch, but his eyebrows are knitted together. Finally, after a comfortable bout of silence, he speaks.

"She's an amazing person, you know. So if she trusts you, then I trust you."

They don't look at each other, but Callie can hear the sincerity in his voice.

"She's pretty incredible." Callie agrees, picturing blonde curls and sweet dimpled smiles. She's just about perfect.

"She was a lot different when I first met her." Tim says, and Callie doesn't say anything in response. If he chooses to share, that's his call. She would never make him talk about anything he didn't want to.

"She was like.. ten when I met her. She looked a lot like she does now, only smaller, and she didn't smile much, you know? I don't think we even knew she had dimples until a year later. She was so quiet, always in her head. I was twelve and I was loud and impulsive and unaware of the world. But Arizona...Arizona was aware. Too aware. It was like she forgot how to be a kid. She never played, she never acted bratty or ate too much candy. She was calculated. She was in control. I remember one night my parents left us alone together and I had gotten all this candy from the store and I wanted to jump on the bed. And she just stared at me, not a smile, and shook her head. I think it broke my heart. Because she was ten. And ten year olds love candy and jumping on the bed! So I dragged her onto that bed and I made her jump, and we jumped for hours. Then I gave her my candy and we giggled until my parents came home. That's the day I realized how precious it was to get her trust. Arizona doesn't hand it out easily. Not after everything she's been through. And I know it's deceiving, because she's sunny and happy and bubbly now. But she still doesn't trust easy. And you've known her a week and a bit, and she trusts you. So just, cherish it. And I really hope you aren't a crazy axe murderer on the loose or something."

Callie wipes a stray tear from her eye and takes a deep breath.

"I'm not." She says, because it's all she can manage to say right now.

She's even more in awe of Arizona. It's easy to be pushed down by life and give in and be miserable and distrustful in life. Running is the easy part, believe it or not. It's the trusting, the friendship and openness that's hard. She stands by her earlier convictions that Arizona is the most amazing girl she's met in her life.

"Well, good talk. If you tell Arizona I told you all of that, I'll have to take my treehouse back, by the way."

The charged atmosphere settles back into one of laughter and general comfort at that comment, and Callie sighs happily. She could get used to spending her days with both Robbins'.

"Wow, you're a hard ass. Don't worry, your secret is safe with me." Callie responds, and Tim reaches out and pats her on the back.

"Awesome. Oh and Callie?"

"Yeah?"

"The girls really do drool at my feet."

They laugh about that one for quite awhile.