(A/N - I hadn't written a one-shot in a while, so here is one!)

I was writing in my songbook one day, working on a new hit for Austin, when I heard a bell jingle, signaling that someone was walking into the music store that my father and I run, Sonic Boom. "Welcome to Sonic Boom," I said, glancing up. "I'll be right with you."

After writing a few more lines, I glanced up to see a girl walking around the shop, glancing at guitars. When I looked over, she smiled at me, and for some reason, she seemed extremely familiar. Her blonde hair was cut to just above her shoulders, and she had large hazel eyes that had a kindness to them - an openness.

Her smile was brilliant - but again, familiar. She was probably three or four inches taller than me, and about four years older. In all, I was extremely jealous of the girl in front of me - she is so pretty. But, I still can't shake the feeling that I know her from somewhere.

"How can I help you?" I asked, walking over towards her. "Are you looking for anything in particular?"

"Actually, I'm looking for a person," she said, looking me up and down. "Are you Ally Dawson?" I nodded my head slowly, wondering where I could possibly know her from. "Good, just the person I was looking for."

"Um, why are you looking for me?" I asked, raising my eyebrows. Despite the familiar appearrance, I have absolutely no clue who this girl is. A huge grin came to her face.

"Because," she explained excitedly. "You're my baby brother's girlfriend, aren't you?"

"Considering I'm not sure who you are," I said slowly, taking a few steps towards my phone in case she was a crazy murderer. "And that I'm not in a relationship, I would have to say, no, I'm not your brother's girlfriend. Who are you?"

"My name is Stellar," she said, extending her hand. "But, I go by Stella. And my brother is Austin. I'm Stella Moon, Austin's sister."

"Austin never mentioned a sister," I said, now picking up my phone, ready to dial 9-1-1. I'm not sure who this girl is, or what she wants from me, but Austin is my best friend in the world, and he has never said anything about having a sister.

"Probably because we aren't exactly on good terms," she said, sighing sadly. "Here, let me explain. I'm four years older than Austin - I'm twenty. Austin and I used to be really close, but I left for college two years ago, and after that, Austin kind of started hating me. He never speaks to me anymore when I come to visit, and he probably doesn't tell anyone about me."

"I need some proof," I said, crossing my arms. "That just doesn't sound believable to me. Austin would never hate anyone, especially not his own sister."

"Proof?" she asked, a small smile playing at her lips. "Okay. I can tell you that he is a musician - he can't write songs, which is why he has you, Ally, as his songwriter."

"A lot of people know that," I pointed out. "Austin is kind of internet-famous, and that's just general information. I'm going to need something deeper than that for me to believe you."

"Okay," she said, biting her lip. "His favorite color is yellow, he loves pancakes, and he is scared of umbrellas - even though he thinks nobody knows that. He has a chocolate sculpture of himself in his closet - which is probably disgusting by now. Oh, and he has a huge crush on you."

"No he doesn't," I said, as an automatic response. I have gotten used to it by now, because everyone assumes Austin and I as a couple. When we tell them that we are just friends, everyone that pushes that we would be 'so cute' together. It's kind of irritating, especially because I actually do like Austin - I just know he would never feel the same way. Stella - if that's her real name - sent me a knowing look, and I shook my head. "Look, that's all true. But, the only thing that you knew that his fans don't was his fear of umbrellas. How did you know that?"

"I told you, I'm his sister," she said, smiling. "I know a lot about him - I care way more than he thinks."

I was starting to lean towards believing her, when the bell above the door jingled again. "Ally," Austin shouted, running towards me and pulling me into our usual embrace. I wrapped my arms around him, enjoying the tight squeeze, before he pulled back, grinning widely. "Is your shift almost over? I was thinking we could hang out tonight." He glanced around the shop, until his eyes settle on the blonde girl in front of us. "Stella?"

I looked up to see Austin's eyes wide, multiple emotions flying around in them - confusion, hurt, and rage. "Uh, hey baby bro," Stella said, laughing awkwardly. "How have you been?"

Austin glanced over at me, looking for an explanation, but I just put my hands up in the air. "I don't know," I said, answering his silent question. "But, what I want to know, is why didn't you ever tell me that you have a sister?"

He glanced back and forth between Stella and I before gently grabbing my hand. "Als, I need to talk to you," he said, his voice sounding strained. He started pulling me towards the stairs, to go up to the practice room, and Stella shot me a confused look.

"We'll be back in a few minutes," I mouthed, and she nodded her head, taking a seat on one of the chairs by the entrance. Austin pulled me into the practice room, shutting the door behind him and taking a seat at the piano.

"So, Als," he said, rubbing the back of his neck. "How has your day been?"

"Don't avoid the subject," I said, wanting to know what was going on. He glanced around the room, looking at everything except for me. "Stand up," I commanded, my voice coming out harsher than I intended. Austin got a worried look and quickly obeyed, since I rarely show this side of me. I walked towards him until I had him pinned against the door, and he was staring down at me with a concerned expression. "Now talk," I said, folding my arms.

"Okay, yeah," Austin sighed. "That's my sister. She's twenty years old and off studying at Yale. I never told you about her, because we don't have a very good relationship. We did, until she left for college - but, that was before I met you. I didn't want to bring it up again, after we became friends."

"Exactly, Austin," I shouted, throwing my hands into the air. "We're friends. Best friends. At least, I thought we are - but, I guess not, considering you couldn't even tell me that you have a sister."

"Ally, we are best friends," he said, running his hands through his hair and leaning forward to hug me. I quickly dodged out of his reach, though, shaking my head. "Look, I just didn't want to talk about it, okay? I don't like my sister, and I don't like talking about her."

He knocked his head backwards against the door, obviously frustrated with himself. "Austin," I said, feeling all of myself soften a bit as I saw how truly angry he was about this. I put my hands on his arms, in hopes of calming him down. He stared down at me sadly. "I'm not mad, okay? I kind of wish I knew you have a sister, but, if you're not on good terms with her, then I understand why you didn't tell me." He smiled a bit, and I finally let him pull me into the hug. We stood there for a few minutes, enjoying each other's embrace, before I pulled back to look up at him. "But, now that I know this, I need to know why you don't like her."

"It's not important," he protested, shaking his head. "We have been arguing for two years, and it's not a relationship worth mending." I shot him a look, and he sighed. "Okay, I'm just mad, alright? My parents have never supported my dreams of being a musician - only Stella did. And then, she just suddenly gets up and leaves one day? I had nobody left to support my ideas, or my thoughts. I got mad, and we started arguing, and before I knew it, it got out of hand. It's beyong repair now."

"Austin," I said, shaking my head. "She has dreams too, you know. She cares for you more than you think-"

"And how do you know that, Als?" he asked, whirling around to face me. "How can you possibly know that when you just met her a few minutes ago?" I took a few steps back, scared. Austin rarely ever loses his cool, and he never yells at me. When he saw my fear, his body visibly relaxed, and his face softened. "I'm so sorry, Als," he whispered. "I shouldn't have yelled. I need to go."

With that, he dashed out of the room, down the stairs, and out of the shop, without even looking towards Stella. "I'm so sorry, Ally," she said, standing up. "I just came here to talk to you about Austin. I didn't mean for you guys to fight about it."

"It's fine," I assured her. "He just needs some time to cool down. In the meantime, I need to talk to you. Do you know why Austin is upset with you?"

"Truly, I don't," she said, shaking her head. "I know that it started when I headed off to Yale, but I don't know why."

"I know that your parents have never supported Austin in his musical aspirations," I explained. "But, he said you always did. He said that when you left for college, he didn't have anyone left to support him. I think he was just upset, and that slowly built up into what you guys have now."

She gave me a sad smile. "I have always believed he can make it in music," she said. "And look how far he has come already - how far both of you have come. But, I have dreams too - dreams that needed to be carried out by going to Yale. I never expected him to hate me for that."

"I'm sure he doesn't hate you, he's just mad," I said, giving her arm a squeeze. "I want to help you guys out - siblings shouldn't act like this. Let's go to your house, and I'm going to talk to him."

"Thanks, Ally," she said as I closed up the shop, and she led me out to where her car was parked. "Austin is really lucky to have someone like you in his life." I blushed, waving it off. "No, I'm serious." She gave me a huge smile. "Every time I have visited home in the past year since you two became friends, you're all I hear him talking about. He tells our parents about you, he talks about you when Dez is over, and sometimes, I hear him singing about you in his room."

"Austin doesn't write songs, though," I said, as we started the drive towards the Moon's house.

"Well, he sure writes a lot about you," she said, giggling. "I have heard a ton, and that's only in the few weeks I have been home for holidays and stuff. He really likes you, Ally, and I can tell that you like him too."

"Yeah, I do," I said, quietly, smiling at the thought of Austin writing songs about me. I'll have to ask him about that after we fix this mess. Soon enough, we were at Austin's house. I said a quick hello to his parents, before darting up the stairs to Austin's room. "Hey," I said quietly, shutting the door behind me.

Austin was sprawled out across his bed, a pair of headphones in - I could hear the music from here. He was tossing a small basketball up in the air, catching it, then repeating it. He turned his head a bit, and saw me. "Ally," he said, smiling and standing up, dropping the headphones and ball. "What are you doing here?"

"We need to talk," I said, trying to sound stern, but kind. I know that this isn't something he wants to talk about, but he has to.

"Okay, before you lecture me," Austin cringed. "I just wanted to say that I'm really sorry that I yelled at you earlier. I was just frustrated, and I took it out on you, and I shouldn't have. I never want to be the one to make you sad, Ally."

"I understand," I said, giving him a quick hug. "I probably deserved it anyway, after all the times I have shouted at you." He rolled his eyes, as I have lectured him many times - and another one was about to come. "Now, I came to say that you need to talk this out with Stella."

"Ally, it really isn't important," Austin said, flopping backwards onto his bed. "We haven't been talking much for two years, so why start now? It's not going to change anything-"

"No, Austin," I said firmly, feeling tears spring to my eyes. He heard my voice crack, and stood up again, worried. "It will change things. You know how I told you about my mother - about how she died in that car accident when I was fourteen?" Austin nodded his head. "Do you know what the last thing I said to her was? I told her that I hated her for cheating on my dad, and that I never wanted to see her again." I took a deep, shaky breath. "And I never did see her again, Austin."

"Ally," he said, quietly, wrapping his arms around me in a protective manner. I let only a few tears slip, before pushing him away.

"Austin, someone that you love can be taken away from you before you know it," I said, shaking my head. "And if that happens, and you and that person are on bad terms, you can't fix it later. I don't want you and your sister to be fighting, if you ever suddenly lose each other. Don't you understand that? I can't go back and fix things with my mom. You need to fix this now, while you can."

Austin watched me carefully for a few minutes, before nodding his head. "You're right," he said, giving my shoulder a squeeze. "I'm going to go talk to her." As he was walking out of the room, he turned back to me. "Oh, and Als? Your mom loved you, even if you did tell her you hated her. She knew you didn't mean it." I gave him a small smile, before motioning for him to go talk to Stella.

I flopped onto Austin's bed, and ended up falling asleep. It seemed like at least an hour, before I woke up with my head in Austin's lap, as he was running his fingers through my hair. "How did it go?" I asked him, sitting up to look at him.

"Great," he said, smiling. "I guess I kind of forgot that she has dreams for her own future. I thought that when she left me, she wasn't supporting me anymore, and she didn't care. But, we talked about it, and we're all good now. Better than good, actually. We're practically best friends again, just like when we were kids. Oh, and we talked about-" he trailed off, blushing. "Nevermind."

"What else did you talk about?" I asked, confused.

"Ally, thank you," he said, avoiding the question. "If it weren't for you, my sister and I would still be arguing." I nodded, glad that they made up, and glad that Austin was happy. "Als."

I looked up to see him watching me carefully, studying my face. "Yeah, Austin?" I asked, not breaking his gaze.

"I don't plan on losing you anytime soon," he said, taking one of my hands in his. "Hopefully, we will never lose each other. But, in case we ever do, I want you to know something really important - because if I lose you without saying this, then I have failed." I motioned for him to continue, as my heart started beating faster, wondering what he could possibly be saying. He sat there for a few minutes, obviously having a mental battle. "I'm in love with you, Ally."

I felt my mouth drop open, as a huge smile grew onto my face. "In love with me?" I asked, making sure he meant it. He nodded his head, as a smile started to creep onto his own face. "Good, because I'm kind of in love with you, too."

We both sat like that, grinning stupidly for a few more minutes, before we heard another voice. "Oh, just kiss her, already," Stella said from the doorway.

Austin rolled his eyes, but glanced at me for confirmation. I barely had the time to nod my head before Austin leaned forward, gently closing the gap between our lips. I have been wanting to do that for the longest time, but it felt even more perfect than I could have ever imagined. Eventually, Austin pulled away, wrapping one of his arms around me, while using the other to shoo Stella out of the room.

I just laughed and grabbed the hand that he was waving, intertwining our fingers and kissing him once again. "Thanks for everything, Als," Austin whispered against my lips.

"No problem," I whispered back. "Oh, and I heard that you write songs about me. Care to share?" Austin just chuckled, as he once again closed the space between our lips.

(A/N - well, what did you thiiiiiiink? :D do you guys have any requests for future one-shots? Leave me a request in a review!)