Disclaimer: I own nothing, if I did I wouldn't be at university.

A/N: Okay, so I've jumped on the Anderberry!Sibling AU that tumblr created. Not entirely intentional, but it just worked out this way. I have a bit more of this written, but my beta wants me to write this as a chaptered fic as opposed to a one shot - so she made me end it where I ended it. If I get enough of a response to the story I will put out more chapters of it, though as opposed to being a continuous story it might just be one shots of different events. Anyway, review and let me know one way or the other. I hope you enjoy the story!

Kurt knocked on the Berry's door, dreading seeing the disaster that is another Rachel Berry party. After the one in Junior year Kurt had strategically been grounded every other time a party came around. This time though was Rachel's birthday and Kurt had no good excuse to not attend. Kurt went to knock again when the door finally opened, and instead of Ms. Berry he was greeted by her brother Blaine.

'Blaine!' Kurt smiled and pulled him into the hug, Blaine quickly returning it. 'I didn't know you would be here tonight, Rachel said you had a Warbler reunion or something of the sort that you had to attend.'

Blaine was grinning widely and hadn't released Kurt from his embrace. 'I did, but I cancelled, I mean it's my sister's birthday, I couldn't exactly miss that, could I? Plus I haven't really had time to hang out with you lately, so really, this is just an excuse to spend more time with you,' Blaine said squeezing Kurt's sides.

Kurt squirmed a little, before batting Blaine's hands away. He makes it so hard to not like him, he just has to be the sweetest person in the world, Kurt thought. 'Stop, I'm ticklish! You know that! Also I know, we haven't hung out in forever, you're never here when I stop by anymore, and senior year has been busy for both of us. I must say, your sister does take up a lot of my time.'

'Rachel does occupy most of your time I have noticed. Hopefully tonight she will spend around Finn so instead I can steal you away and not have her eavesdropping,' Blaine said, wrapping an arm around Kurt and pulling him inside, only then noticing the bag in his hand. 'Oooooh, did you bake something? Please tell me you baked something and that I can steal some and my darling sister wouldn't notice.' Blaine made grabby hands at the bag.

Kurt was swatting them away, whilst simultaneously trying to remove himself from Blaine's arms to get the present further away from him. 'What are you five? Stop it, Blaine!' That's when Blaine started tickling Kurt's side and Kurt couldn't help the giggles coming out of his mouth. 'Blaine you n-need t-to st-stop, please?'

Blaine kept his arms on Kurt's waist, 'Do you promise to give me some cake?'

Kurt went to reply but another voice answered, 'Blaine get your hands off of my friend and my cake. Go downstairs, I'm sure the boys are missing you.' Blaine and Kurt both exchanged a confused glance, and Kurt just shrugged.

'Okay sis, whatever you say. See you down there Kurt.' Blaine smiled before heading down to his basement.

Kurt raised an eyebrow at Rachel before pulling her into a tight hug, 'Happy Birthday Rach! How is everything down there? Not too out of hand?'

'No, everything's fine,' she replied with a frown still on her face, 'What were you and Blaine doing? You were up here for ages.'

'Not really, I mean I just got here and we were catching up. What's up with you Rach? Since when do you care if Blaine and I talk.' Kurt had noticed lately that she had been trying to get them to spend less time together. Kurt figured it was because she noticed he liked Blaine, but I mean, she had told Kurt that Blaine was interested in a guy from Dalton, so it shouldn't matter how Kurt feels if Blaine isn't interested.

'No reason, I just don't like to be neglected on my birthday,' Rachel said with a pout.

'Naw! I'm sure you won't be. Let's go downstairs, I'm sure everyone's missing you and you don't want to miss any of your party just for little ol' me.'

When they got downstairs Kurt immediately made eye contact with Blaine who smiled in his direction before raising his eyebrows in question, hoping for an explanation about Rachel's weird behaviour up stairs. Kurt shrugged in reply, and made a 'she's crazy' notion with his finger which made Blaine grin in reply.

It was then that Kurt realised everyone was drinking. Excellent, just what I need to spend my Saturday night doing, looking after drunk people. Two hours later and everyone at the party was looking a bit sloppy except for himself and Blaine. Kurt really shouldn't have been surprised when someone, Santana most likely, shouted out that they should play Truth or Dare. Everyone replied with some kind of cheer, which meant that Kurt would be stuck playing Truth or Dare with a bunch of intoxicated teenagers.

'OKAY!' Santana shouted to the group after they placed themselves in a haphazard circle. Kurt only just noticed that Blaine had sat next to him, and flashed him a quick smile that was hastily returned. 'I'm going first bitches. And I am directing my question to the lady of the hour, Ms. Berry. Truth or dare?'

'Truth.'

'Have you had sex with Frankenteen yet?'

Blaine looked like he was going to be sick, 'I didn't realise that by agreeing to this game I would be subjected to the horror story that is my sister's sex life,' Blaine whispered in Kurt's ear.

Kurt couldn't help but let out a little giggle, quickly replying with, 'Well you're not alone, don't forget that Finn's my brother now. This is territory I thought I never would have to worry about.'

Rachel noticed the exchange and was distracted by it. 'Come on Berry! Tick Tock, Tick Tock.'

'Oh uhm, yes I have,' she said, not taking her eyes off of Kurt and Blaine who hadn't even noticed her staring and had continued to whisper to each other. 'Oh it's my go now, I chose, Mercedes, truth or dare?'

'Uhm, I'm going to go on the safe side, and say truth.'

'Did you and Sam really hook up this summer?'

Mercedes blushed before nodding, 'Yeah we did.'

Sam cut over her, 'We're actually still together.' The couple smiled at each other before quickly kissing.

'Awww, that's so adorable!' Kurt whispered to Blaine.

'They do look good together. Just look how happy they are,' Blaine said. Kurt turned and made eye contact with Blaine before smiling.

'Who would have guessed that you are such a sap?'

Blaine scoffed, 'Oh, don't even try to pretend like that isn't the sweetest thing ever.'

Kurt reluctantly nodded his head, only now noticing that Mercedes and Sam had stopped making out and Mercedes had picked Puck, who had apparently picked dare judging by the lack of clothes he was wearing and the fact that Mike and Sam were doing body shots off of him.

'There you go chocolate lover,' Puck said, 'Now it's my turn, Blaine, truth or dare?'

Blaine noticed that Puck's eyes looked calculating, like he was planning something. 'I'm going to have to go with dare, who knows what you people could make me reveal if I said truth.'

'Okay, I dare you to make out with Hummel,' Puck said with a proud smirk on his face like he had just invented cheese or something.

'NO! No, absolutely not. I am the birthday girl therefore I can veto any dares and I veto this one,' Rachel interjected.

Santana snorted, 'We never agreed to those terms. Plus I wants to see these two get their mack on. It would be totally hot.'

Both Blaine and Kurt blushed in embarrassment as the entire circle seemed to contemplate them for a bit.

Tina nodded, 'Yeah it would be hot.' Mercedes and Quinn quickly agreed with Tina.

'I love both of my dolphins, and they should love each other.'

'Look, I don't want to see my brother and my best friend kiss.' Rachel tried again to veto the dare.

'Then you can leave the room Berry. This is going to happen, whether you like it or not.'

Kurt was a little hurt by how much Rachel clearly didn't want him to kiss Blaine. I mean it was just a kiss, it wasn't like anything would happen from it. And Rachel knew how much Kurt liked him, thanks to Mercedes, so she would know how much it would mean to him just to have this moment.

Rachel pouted before saying, 'Fine, but only 10 seconds, and no tongue.'

Santana shot her a death glare, 'Thirty seconds and tongue.'

Kurt raised his hand and waved, 'Do mine and Blaine's opinion count for any of this?'

'No,' both girls said in unison.

'Well that's good,' Kurt murmured to Blaine who just laughed in reply.

'Okay boys, you have 20 seconds and you have to use church tongue.'

Blaine cocked his head to the side, 'Church tongue?'

'Little bit of tongue, but nothing grotesque Blaine,' Rachel said in a know-it-all tone.

Blaine turned to Kurt, mimicking Rachel's facial expressions and making Kurt giggle. 'Less talking, more making out!' Puck shouted.

Blaine's eye's flickered between Kurt's eyes and lips before he leaned in and captured Kurt's mouth in a soft kiss. After a second Blaine cupped Kurt's face pulling him closer and running his tongue along Kurt's bottom lip. Kurt was so caught up in the kiss that he nearly didn't notice when Santana's countdown finished. He wouldn't have noticed at all if Rachel Berry hadn't pulled them both apart. 'It's been 20 seconds,' was all she stated, before going back to sit with Finn.

Kurt and Blaine just stared at each other for a minute before Rachel once again broke their moment, this time telling Blaine that he had to choose someone for truth or dare. The rest of the game was a bit of a blur, Kurt knew that he had seen some really disturbing things, and knew more about his friends' sex life then he really wanted to. After about an hour the game broke up so that everyone could have some cake, and then Rachel set up karaoke which meant that the rest of the night would be listening to mediocre singing as his friends got steadily more inebriated.

When it hit around midnight Kurt went upstairs to get a drink of water. It was clear that everyone was on their downward spiral, Rachel had already passed out on the sofa, and a lot of the couples had curled up in their respective beds for some cuddling. Santana, Puck, Brittany, Artie and Quinn were the only ones still drinking and even they were slowing down.

Kurt just filled up his cup with water when he heard the basement door opening and someone walking towards the kitchen. Maybe Quinn has realised that unless she wants to feel like hell she'll need to drink at least 3 litres of water. Kurt was pleasantly surprised when he realised it was Blaine that had come up stairs. 'Hey,' Kurt said softly.

'Hey, sorry for crashing your party in the kitchen, but the people downstairs aren't the best conversationalists right now.'

Kurt chuckled. 'I guess they wouldn't be. Though let's be honest, Santana, Puck and Brittany are never really good for conversations.'

'True.' An awkward silence descended on them, and they could hear faint shouts of 'Shots, shots, shots.' Blaine shuffled a little, 'Want to go outside and sit on the porch steps? It might not be so loud.'

Kurt agreed quickly, 'They have to stop soon right? I mean I would like to sleep at some point tonight.'

'You and me both,' Blaine replied. 'Kurt, look I have something I want to tell you, that if I'm being honest with myself, I've wanted to say for a while.' Kurt noticed that Blaine's hands were picking at a loose seam in his jeans and placed his hand over Blaine's to make him stop. Blaine locked eyes with Kurt, and slowly raised a hand to cup Kurt's neck.

'Blaine, what are you doing?' Kurt murmured not taking his eyes off of Blaine's.

'Something I should have done years ago,' was Blaine's reply before he moved in and kissed Kurt firmly on the lips, tilting his head immediately to deepen the kiss. Kurt felt Blaine's tongue against his bottom lip and this time Rachel wasn't there to stop them so Kurt opened his mouth deepening the kiss even more. Kurt pulled back slightly and sucked on Blaine's lower lip before biting it gently which caused Blaine to moan. Kurt pulled back and rested his forehead against Blaine's. Kurt licked his lips and noticed Blaine's eyes following the movement.

'Okay,' Kurt said, then swallowed trying to make his voice sound more solid, 'Okay, what?' Kurt asked.

'I liked you the moment I met you last year, Kurt. I've tried to make myself stop because Rachel told me you weren't interested. But I can't help it Kurt, and you're just so damn witty and beautiful and I could keep denying how much I care for you except then we kissed tonight and it was like 100 fireworks went off in my head at once.' Blaine took a deep breath, 'I also thought after the kiss that you might be interested a little.'

'Woah, wait, back up. You've liked me for how long? Rachel told me that you were interested in a boy at Dalton, and that you are just naturally flirty.' Kurt looked confused, 'Why would she lie to us?' Kurt asked.

'Are you saying you like me too?' Blaine asked hopefully.

'Yes, you moron, of course I like you, that's why I stay here more often than Rachel coming to mine. I just needed an excuse to see you and talk to you. Well at least until you came to McKinley and now I see you on a more regular basis.' Blaine's face lit up in a grin before he pulled Kurt in again to kiss him.

Kurt couldn't say how much later it was, kissing Blaine was like entering a place where time ceased to exist. When they pulled apart for air, Kurt glanced at his watch and realised it was just past 2am. 'Wow, its 2am already,' Kurt stated in shock.

'Huh, time sure flies when you're having fun,' Blaine said with a wink in Kurt's direction.

'Oh my god, I can't believe you just said that.' Kurt nudged Blaine's shoulder though there was a silly grin plastered on his face. Blaine stood up and offered Kurt his hand.

'Kurt? What are we?' Blaine asked, keeping a hold of Kurt's hand.

Kurt looked at their clasped hands, 'I'm not sure Blaine, can we talk about it in the morning? We're going to have to talk to Rach about this as well you realise.'

Blaine sighed and nodded, he knew he wouldn't get a straight answer out of Kurt. 'Come on then, bed time. I'm sure you can crash in Rachel's, she won't mind.'

'Good idea.' They both headed inside, Blaine not letting go of Kurt's hands as they made their way upstairs to Rachel's bedroom. They pushed open the door to see Rachel and Finn on her bed making out messily.

'Oh gross, gross, gross. I did not just see that. Ew,' Blaine stated cringing, he looked at Kurt to see his face twisted in disgust.

'That is something that I never wanted to see, nor ever want to see again, that was nasty.' Kurt sighed and rubbed his head, 'Also, now where am I going to sleep?'

Blaine was studying their hands, 'You could always crash in my bed. No funny business, I promise.'

Blaine expecting Kurt to say no, didn't stop studying their hands. 'Is cuddling counted as funny business?' Was all Kurt asked, pulling Blaine towards his bedroom.

'Wait, you'll stay with me?' Blaine asked slightly shocked.

'Well, to be honest, there really is nowhere else comfortable to sleep. Plus, just count it towards more time that we can hang out,' Kurt stated with a grin. 'I'm going to quickly get changed,' Kurt said leaving to go to the bathroom to put his pyjama's on and when he got back to Blaine's room, Blaine was already under the covers snuggled in on one side. 'You look adorable.' Kurt smiled.

'I'll look even more adorable when you come cuddle me.' Kurt laughed getting into the bed on the other side. Blaine quickly pulled Kurt tight against him. 'Sleep time now.'

Kurt giggled, 'you really are adorable.'

'Mmmm, that's what my dad's say.' Kurt snuggled in closer, I could really get used to this.Both boys drifted off to sleep, comfortable being in each other's arms.

Kurt was rudely awoken by a horrible screeching noise the next morning. It was only when he became more conscious that he realised that it was Rachel. 'Whaa?' He looked down to see Blaine slowly waking up. Kurt couldn't help but notice how adorable Blaine looked rubbing his eyes. Blaine finally woke up enough and made eye contact with Kurt, 'mmm morning,' he said with a grin.

'What are you both doing in here!' Oh, that's right, Kurt remembered, horrible screeching, woke him up.

'How are you yelling and not severely hung over?' Blaine asked, keeping his arms around Kurt.

'Well finding your brother and your best friend in bed together is a pretty sobering sight,' Rachel stated, glancing between both of the boys. 'Are you going to explain to me why you two are sharing a bed?'

"What's your deal Rachel?' Kurt asked, 'We shared a bed, because when we went to go to sleep you and Finn were occupying your bed. Also, that was more of your sex life than I ever wanted to see, just fyi. So, Blaine asked if I wanted to share his bed, and I agreed. It's not a big deal Rach.'

'Yes it is, because you are my best friend, and he is my brother. Now get out of bed, breakfast is ready.'

Kurt and Blaine exchanged a look of disbelief before getting out of bed and following Rachel to the kitchen where the rest of the glee members were assembled. Though they all looked half asleep, or half dead, Kurt couldn't quite work out which. Needless to say the morning was spent avoiding Rachel's death glare and talking to Blaine only when she wasn't looking. For that reason Kurt left fairly shortly after breakfast, helping Finn to his car so they could get home and Kurt could avoid Rachel's hostility.

'It was a great night Rach, thanks for having us. I'm sure Finn shares the same sentiments, but he seems to be a bit comatose right night.' Kurt pulled her into a hug. And Rachel latched on.

'Nothing happened between you and Blaine right? Like you're just friends?' Rachel asked whilst keeping a tight hold on Kurt.

'What would you say if something had happened?' Kurt asked, making it seem like pure curiosity.

'I don't know, it's just, you're my best friend you know. And I don't want to share you with Blaine. I already have to share all my stuff,' Rachel said, pulling back. Kurt just sent her a small smile, but didn't deny that anything happened. Kurt didn't want to lose his friendship with Rachel. She was his best friend, and they had plans to go to New York together.

'Rach, you know you're my best friend too. And I don't mind sharing you with Finn, just some food for thought. Anyway, I'll see you tomorrow.'

Hey Kurt! It's Blaine, I know we didn't get a lot of time to talk this morning, so I was wondering if maybe you would like to go on a date with me next Friday night – xB

Blaine, look I've been thinking, I don't think it would be wise for us to date. Or talk about what happened Saturday night. – Kurt.

What? Kurt, you said you have liked me for as long as I have liked you, what's going on? Why the sudden change of mind? – xB

Kurt bit his lip, he didn't want to hurt Blaine, but Rachel clearly didn't want them to be together, and if it meant sacrificing his happiness to keep his best friend, Kurt would do it.

No reason, just drop it Blaine. - Kurt

Blaine frowned at his phone, and put it aside, trying to push the hurt feelings down. Something must have happened, Rachel must have said something to Kurt, because no way would Kurt have this much of 360 degree turn around without her interference.

Meet me in the choir room before school. Please. – Blaine

Kurt re-read the text again before pushing open the door and seeing Blaine pacing nervously in front of the piano. Kurt cleared his throat, gaining Blaine's attention and making him halt. 'Hi,' Kurt said nervously, quickly closing the door behind him.

'We need to talk,' Blaine stated, he wasn't letting Kurt weasel out of this conversation again like he did Sunday night.

'No we don't, like I said then Blaine, there's nothing to talk about.' Kurt's tried to stay as emotionless as possible, but his shaking hands betrayed him.

'You can't pretend Saturday night didn't happen, Kurt. Or Sunday morning for that matter! It doesn't work that way,' Blaine said, moving in front of Kurt, essentially pinning Kurt between the wall and himself so that Kurt couldn't run again. 'We kissed.' At this Kurt blanched and looked down at his hands, Blaine continued on, 'We also slept together.'

'Yes, we kissed and slept in the same bed. What's your point?' Kurt said, still speaking to the floor. It was Blaine's damn eyes that got him into this mess and he wasn't about to make the same mistake twice.

'My point is that we kissed Kurt! Come on, you can't deny that we have something! Don't pretend like you can't feel this,' Blaine stated, stroking Kurt's arm and watching as goose bumps appeared in its wake.

Kurt shook his head, moving his arm away from Blaine's, 'Whether I feel this or not is irrelevant Blaine, this isn't going to happen so just let it go.' Kurt went to move back to the door to the choir room but Blaine blocked his path, raising arms on either side of Kurt's head.

'What does that mean, Kurt? Why do our feelings not matter in this? You want to be with me that much I can tell, so what's holding you back?' Kurt could feel Blaine trying to make eye contact with him but he kept his eyes focused on the floor. 'Look at me Kurt,' Blaine said, before placing a finger under Kurt's chin and raising his face so that Kurt was looking him in the eyes. 'What's stopping you from being with me?' Blaine whispered. Kurt didn't know how it happened but all he knew was that he was once again kissing Blaine. His stupid eyes, Kurt thought, it's always his damn eyes.

Kurt turned his face away and felt Blaine chasing his lips. 'I told myself I wouldn't do that again,' Kurt said, his voice breathier then he would've liked.

'Please, Kurt,' Blaine practically whimpered looking at Kurt with tears in his eyes.

'Your sister,' Kurt replied. 'She doesn't want us to be together.' Blaine went to protest but Kurt merely placed a finger over his mouth. 'Don't even try to deny it Blaine, she's been lying to us for months about each other's feelings. Not to mention that I'm only allowed over when you are definitely not going to be there.' Kurt looked away from Blaine's eyes only to look back seconds later. 'Also did you miss all of Sunday morning when she death glared us because we shared the same bed. She's my best friend Blaine, I can't do this to her. I want to, god knows I want to, but I can't.'

Blaine took a deep breath in, 'So that's all you need? You just need her approval and you'll be with me?'

Kurt laughed, 'You make it sound like it'll be easy.'

Blaine moved his hands up and down Kurt's side where they had been resting. 'She might not have wanted for us to develop feelings for each other Kurt, but if she knew that we truly cared about each other then I'm sure she would be happy for us.'

Kurt's fingers moved to play with Blaine's hair whilst he spoke hmm, his hair is really soft, he needs to forgo the gel at some point, 'And how do you know that?'

'Oh come on Kurt, she loves us. Once she realises that us being apart makes us miserable she will want us to be together.' Blaine looked at Kurt through lowered lashes, 'Being without you Kurt would make me more miserable than you could imagine.'

Kurt let a small smile show, 'I don't know, I think I have a vague idea.' Kurt shifted his hands moving them to Blaine's shoulders, when Blaine suddenly pulled him into a tight hug. 'School's going to start soon Blaine.' He felt Blaine's nod against his neck.

'I know, but just a few more minutes, please?' Blaine pulled back to look into Kurt's eyes.

'Argh, you know, don't you?' Kurt said smacking Blaine's arm lightly.

Blaine let a small smirk show, 'Know what, Kurt?'

'That your damn eyes make me melt!'

Blaine chuckled, 'I may have worked that out last night when you kept trying to avoid my gaze.' It was then that the bell decided to ring, bringing them back to reality. 'One more kiss? I am going to talk to Rachel a.s.a.p. I wouldn't want you to become someone else's boyfriend before I have the chance to talk to her.'

'There is no one else Blaine, but I will take the kiss.' Kurt leaned forward then capturing Blaine's lips in a kiss, Kurt sucked Blaine's bottom lip and bit down lightly remembering it had made him moan last night. Kurt was happy to hear that it still had the same effect today, before pulling away.

'That's not fair,' Blaine whined.

'Nothing's fair in love and war, darling.' Kurt said before dashing out of the room to head to class laughing.