Hello! Thanks for reading, now before you start; this is only my second fic, and my first A/B/O fic, so go easy. I have read a lot of them, but I have never read an origin story about it. I thought I would give it a go. Anyway, please read and review, I just put this up as a teaser, I will come back to it when I finish my first fic, because as my fiance pointed out 'you don't want to be one of those people that get half way through a story, and then stop'. He is right but I'm not gonna tell him that ;)

Oh, WARNINGS FOR - Sex type stuff, swearing and some slight intolerance?

I just wanted to put this out there to get a general reaction.

Read and Review! Tell me what you think!

Love!

Chapter One

"Gabriel, Castiel, get the hell up! Your gonna be late!" Anna's voice filtered up the stairs, rousing Cas from his dream addled sleep. It had been a rough night, once again troubled by mysterious figures and hot touches. He winced when he felt the tell-tale ache of morning wood, he was a teenager but seriously, come on. Every morning for the past month, he'd woken up hard and aching, no matter what he tried. Having a quick wank the night before, a long session with his computer, in the shower, nothing!

Every.

Single.

Morning.

"Just five more minutes…" Cas heard the muffled groan from under his twin brothers blankets. Yet another reason having incessant morning wood was problematic. He not only shared a bathroom with his brother, but also a bedroom, which wasn't all that big. It had caused multiple occasions of embarrassment for Cas. Gabe took every chance to remind him of his problem.

"Cassie, get up, I don't wana see your fuckin tree stump this morning." Aaanndd cue the brotherly love.

Grumbling in reply, he threw the blankets back and stumbled blindly to the bathroom, closing and locking the door behind him. He knew it was impossible to pee in his situation, so he started the shower and stripped off, hoping the movement would distract him into deflation.

As with every morning, he was wrong.

Sighing in resignation, he stepped under the hot jets and took himself in hand. After so many mornings of it happening, it had become almost an automatic response as soon as he was in the shower. Grabbing some shower gel, he slicked himself up and rubbed fast, hoping to get it over and done with quickly, so he could continue with the rest of his routine. It was sad, really. It was supposed to be exciting, relaxing. Instead it happened so frequently he viewed it more as a chore than anything else. As well as a nagging feeling in the back of his head that told him it wasn't normal. Maybe he should ask Anna…

A loud bagging on the door interrupted his thoughts, good fucking god, he'd come without even realizing it. Wow.

"Cassie hurry the fuck up! We've got half an hour before we gotta leave." Cas hurriedly washed himself down, finishing rinsing his body and hair. He was still thinking about talking to Anna about his problem when he opened the door and Gabe barreled past him. His brother slipped behind him, pushed him forwards into their room and shut the door behind him.

Twenty minutes later, they were all seated around the table, munching quietly on their breakfasts. Cas wondered if he should wait until Anna and him were alone, Gabe already knew about his problem, but he wanted to spare his brother, and himself, the embarrassment of talking about it frankly. He would ask Anna after school, when she returned from the hospital.

School was an oppressive nightmare.

Sure, they went to a fairly good school, it was nice and progressive, but it didn't stop the stink eye from the footballers or the girls all wanting to be his 'best friend'. Just because he dressed well, took care of his appearance, did his work and handed it in on time, everyone just assumed he liked guys. If he was totally honest with himself, he didn't know what he liked; it hadn't really crossed his mind much. He was eighteen in a couple of weeks, and he'd never even been kissed. Anyone else might have been horrified, his brother reminded him constantly, but no one had taken his fancy. He wasn't the kind of guy that gave human physical connection no meaning. When he eventually did meet someone he wanted to be physical with, he wanted it to mean something.

"Hey, Cas. You coming to the party tonight? Gabe's gonna go, so I thought I'd ask you." Lisa, a brown haired girl in his year, sidled up beside him in the cafeteria. His tray with half full of the sloppy crap they tried to call food. He would only eat half of it, his appetite all but having disappeared this past month. He wasn't going to the party, Gabe had mentioned it, but as he thought more about it, it was a perfect opportunity to talk to Anna, alone, about his morning… problem.

"Sorry, Lisa. I have a… prior engagement. Have fun." Cas smiled, but it didn't quite touch his eyes. He had no love for the people of this school. They were all self-involved dick bags that were only interested in the next craze, or who was popular that week.

It pained him.

They had only been at the school a few months, having moved so Anna could complete her residency, and already Gabe had made many friends, but that was just his personality. He was out going, funny, charming when he wanted to be, or when he wanted something, and most importantly, he knew how to talk to people without offending them. Cas lacked that particular personality trait. He was almost the total opposite of his twin, he didn't like talking to people, he found it stilted and difficult to pay attention to people he had no affection for. He preferred his books, his writing and the company of his family, as annoying as they could be at times. He never had to prove himself to them, as he felt like he had to do at school to all the mouth breathers that occupied it.

Fifth and sixth period flashed past, and finally the last bell rang in a jubilant buzz of triumph. He'd gotten through another day, thank Christ for that. Shouldering his way down the hall, he narrowed his eyes at the scruffy shape of his brother leaning against his locker.

"Gabe." He greeted his twin, shoving him out of the way to put his books away in his locker.

"Sup, Cassius. I hear you're not coming tonight. Why not? Give you a chance to get out, I know this great guy that wants to get to know you a little better, if you know what I mean." Gabriel twitched his eye brows suggestively, but stopped when Cas slammed his locker door loudly.

"How many times do I have to tell you, Gabriel! NO!" Cas shouted, surprising his brother into speechlessness and shock. His eyes were wide and his mouth was hanging open. Cas looked around quickly, luckily the hallway was mostly deserted, and only a few people gave them funny looks at the outburst. He closed his eyes, trying to calm his erratic breathing. He had not meant to shout at his brother, but everything just… overwhelmed him, at that particular moment. Damn teenage hormones.

"I'm sorry, Gabriel. I didn't mean to do that. I – I don't feel well, so no, I'm not going tonight. I hope you have a good time though." Cas put a comforting and apologetic hand on Gabe's shoulder, squeezing gently when he looked into his brothers golden brown eyes.

"Nah, man. Its ok. Finals and everything must be pretty stressful for a high achiever like you. I'll see you later for dinner." Cas gave him a parting pat, and walked off, leaving his confused brother in his wake.

Walking out the school doors, he spied Anna's car parked in the middle of the lot. Making his way over to it, he saw his sister look up and beam at him, waving behind the window. He loved his sister; she had been their lighthouse in stormy seas since their parents had died. Looking after her younger brothers, while completing her residency to become a doctor was not an easy feat, but she seemed to be managing. They helped out where they could, but she still insisted on picking them up from school whenever she could, to give them a sense of normality she had said.

He opened the back door and flung his bag in, before climbing in the front.

"Hello, Anna." Cas smiled at his older sister, instantly calmed by her presence. She always had that effect on both him and his brother; she was the calming constant in their lives, which was lucky as they were constantly in need of it.

"Hey, Cas. How was your day?" Anna asked as she pulled out of the parking lot, turning the car in the direction of their house. Cas thought about telling Anna that he hated the school, the people there and almost everything about his life here in this stuck up, materialistic city. But he didn't want to heap more stress on her already exhausted shoulders. He could tell she was tired, the strained smile, dark smudges under her eyes and the yawning was also a dead giveaway.

"It was alright, the usual stuff. Gabe's going to a party tonight, but he'll be home for dinner. I ah, I wanted to talk to you, actually, without Gabe there." Cas cleared his throat nervously, suddenly horribly embarrassed about the conversation to come. Anna was a medical professional, but she was still his sister. He watched as Anna's eyebrows rose in surprise.

"Oh? Gonna give me any clues?" She smiled at him cheekily, clearly thinking whatever it was, can't be that serious. Cas cleared that up right way.

"It's, ah, medical. Can we talk about it later? Please?" The last thing he wanted was to start discussing his erectile malfunction on the road home. At least in the house, he had the option of running away when the topic got too cringe worthy. Anna looked mildly taken aback, but steadied herself before nodding, eyes on the road.

At home, he headed straight to his room, to get his homework over and done with. He didn't understand why people, mainly everyone else in his class, insisted on leaving their work until the last minute, or those who didn't do it at all. It didn't take very long; he only had history, math and English to finish tonight.

A while later he heard the door slam and Gabriel's voice echo downstairs.

"Honey's! I'm home!" Cas just rolled his eyes, his brother was always so boisterous and crass. He supposed that was what drew others of his year group to him, he made people laugh. He wasn't jealous, friends weren't that high on his list of important things. They just took time away from his studies and the other things he liked doing, alone. That reminded him of the fact that he hadn't had an erection all day. It brought a huge smile to his face, maybe his problem was going away. He was still going to talk to Anna though, he was smart enough to know that just because a problem didn't rear its ugly head for a few hours, didn't mean it's gone for good. Finishing his homework with a flourish, he closed his laptop and headed down stairs for dinner, in a decidedly better mood.

It didn't last long.

Gabe greeted him at the table, with a shit eating grin and an attitude to match.

"You know, Cassie, that guy I was talking about? He's hugely disappointed you're not coming tonight. He was really looking forward to meeting you." Gabe had an evil twinkle in his eyes that Cas did not like.

"He's only going on what you tell him about me, Gabe. I'm sure you embellished quite liberally. I'm sure he'll live." Cas thanked Anna for the food placed in front of him, immediately felt guilty that he hadn't come down earlier and helped her. He had his fork halfway back to his plate when Gabriel spoke, and he froze.

"Well, he loved your picture, so there's that too." Gabriel gave an evil cackle when Cas choked on his mouthful of food, dropping his fork which clattered over his plate.

"WHAT. PICTURE. GABRIEL." Cas was glaring at his brother, jaw clenched. He liked his privacy, Gabe knew that, and yet he still took a picture and showed someone he didn't know, without his consent. He didn't have face book or any of those other social media crap traps that everyone else seemed to have, so his image was not splashed all over the internet. Gabriel grinned in glee as he fished out his phone, fiddled with the screen and shoved the surprisingly clear image in Cas' face. As he started to identify the blurry outline of his own body, he realised it was one day last week, when in his haste to run to the shower before he blew his load in his pants, he'd forgotten to lock the shower door. Gabriel had come in, claiming to have forgotten something…

Oh my fucking GOD.

Gabriel had snapped him, mid moan, one hand on the wall in front of him, the other, thankfully out of the picture, on his cock. It was the most intimate, and embarrassing, photo Gabriel could have possibly taken.

He couldn't breathe, he couldn't see, all he felt was heat and anger and –

Wait, what the fuck?

He touched his face, blinking slowly as his hand came away wet. He was fucking crying. What the hell was wrong with him?

"Uh, you ok, Cassie?" Gabriel asked quietly, he had leaned forward, and had put a hand on Cas' shoulder. He still couldn't hear properly, but he could hear Anna tearing strips off Gabriel, telling him what stupid prank to pull on Cas, how he was banned from the party tonight, and that she didn't care what he thought, he was to go to his room after dinner, and stay there or so help her...

He finally found his voice after about five minutes, for some reason more ashamed of crying than the prospect of some stranger seeing him in his most vulnerable moment.

"Does it look like I'm ok, Gabriel? Are you FUCKING SERIOUS? I have never been more mortified in my life. Why, why? Why would you do something like that?" He was on the verge of tears again, god fucking damnit, but he held them at bay, his anger acting as a wall they couldn't breach.

"Look, I'm sorry, ok? I didn't think you'd react that badly. I didn't even show him the photo; I just wanted to play a trick. I'm really sorry, Castiel." Gabriel was looking down at his hands, shame and sadness covering his face. Cas unfroze, with the use of his full name, he knew his brother hadn't meant anything by it, and if he hadn't shown anyone the photo, then no harm had been done. He startled his brother by wrapping his arms around his shoulders, drawing him into a hug.

"It's ok, Gabe. I have no idea why I reacted like that. I should have just punched you and been done with it." He turned to Anna, who looked just as shocked as Gabe. "Anna, if it's alright, I think Gabe should still go to the party." Anna gave him a questioning look, but when he raised his eyebrows back at her, she caught on pretty quick, remembering their conversation in the car.

"Oh, whatever, fine. But be back by midnight or that's it for the month, alright?" She glared at Gabriel, who shrunk under her gaze. Cas smiled, she will make a wonderful mother when she has her own.

Gabriel jumped up from his seat, grabbing their empty plates and running into the kitchen. How he didn't drop anything, Cas will never know. He swatted at his brother as he bounced back into the room, putting sloppy kisses on his and Anna's heads.

"I'll see you later! Don't wait up!" With that, he was out the door, hurricane Gabriel silenced once more.

Anna just shook her head, laughing quietly. "So, do you wana talk here, or in the living room? I vote couch, because I am beat!" Castiel nodded his head and followed her into the other room, flopping down onto the couch opposite his sister. She leveled him with a professional look. "Anything you tell me will stay between us, Castiel. You just tell me what's troubling you and I'll try and help, ok?" Castiel smiled, once again grateful for such an understanding and patient sibling.

"Alright, I just want to say this is horribly embarrassing for me, and I wish I didn't have to come to you with this, but I trust you, so here it is." Cas took a deep breath, steeling himself for the embarrassment that was to come. "I know as a teenage boy, it's normal to get, ah, certain, things in the morning, but every morning, without fail, for the past couple of months, I've woken up with it. I have also started getting… night sweats and just… a feeling that something isn't right. Anna? What is it?" Cas looked with concern at his sister, who had gone remarkably pale and was shaking. He was instantly concerned for himself, thinking he had just described some awful disease and that he was pretty much on his death bed.

Death by boner. Huh. Worse ways to go.

Anna cleared her throat, still pale but she seemed to have regained her composure somewhat.

"Cas, have you told anyone else about this? Do you have any other symptoms? I know this is very personal, I'm sorry, but have you, ah, leaked at all?" Cas was staring at his sister in shock, what the fuck was she talking about?

"Leaking? From where, exactly? Of course I haven't told anyone. It's awful and embarrassing. Is there something wrong with me? Do I need to go to hospital?" As Cas stopped speaking, Anna shot forward, grabbing Cas' hands in hers.

"No! Oh my god no. You cannot go to hospital, you can't tell anyone and to be honest, I have no idea what's wrong. I'm going to tell you something, Cas, and you have to promise me you won't tell anyone, ok?" Anna was looking at him with pleading eyes, fingers almost painfully digging into his hands.

"I promise, Anna. Just please tell me what's going on." Cas was more than a little scared at this point, Anna's words and actions were cause for concern. He watched as she sat back, letting go of Cas' hands, running her own through her bright red hair.

"We had a kid come in, a couple of weeks ago. Pretty much your age, he had just turned eighteen. His parents brought him in because they just didn't know what to do. He had a raging fever; he was sweating, incoherent, delirious. They thought at first he was on drugs, but then we stripped him, and he was, like, leaking, everywhere. At first he kept rambling and mumbling that he was on fire, that he was so, well he said fucking horny, but we didn't understand what was happening. We didn't know what drugs to give him, because we didn't know what was wrong. We ended up putting him in one of the padded psych cells, because when we strapped him down, he screamed the place down saying that he had to touch himself, had to have something in him. We were beside ourselves. So he went in the cells, with a sedative, and he just, well, touched himself, over and over. He kept crying that it wasn't enough, was never enough, that he needed something more. It was horrible. Eventually he exhausted himself, but his parents were so distraught, and mortified. They said up until a few days ago he'd been a normal kid, good at school, quiet, no trouble. Then he started complaining about incessant morning wood, fevers, night sweats, and a feeling." Anna was sobbing by the end of her speech, and tears were falling down her cheeks.

Cas was frozen, not willing to accept that his symptoms where a harbinger of what he would experience. He cleared his throat.

"So, um, what happened? Did he snap out of it?" Cas asked hopefully, maybe the kid was ok, it can't have been that bad, could it?

"He was in there for eight hours, before it happened." Anna closed her eyes, and Cas gulped, preparing for the worse. "We got a call to have him ready on a gurney or in a wheel chair or something, because he was being transferred to a 'specialist facility'. Ten minutes later, I was waiting with another one of the residents, when these two big guys in FBI type suits marched up and took him. They looked all kinds of shady but we couldn't do anything because the call had come from the hospital director. But the weird thing was, I was looking out the window and in the ambulance bay, they had parked their big black, equally shady looking SUV. The kids parents were there to, they were forcing them into the car along with the kid. Another car pulled up and two more guys jumped out, carrying a little kid, the parents grabbed the kid, I assume it must have been theirs and they all got in and drove off." Anna snuffled slightly, eyes red and bloodshot. Cas wished there was something he could do, he was hopeless in situations like this, emotions were not his forte. He awkwardly patted Anna's shoulder.

"So, the government kidnapped him and his family? Because he was out his mind, crazy horny? That sounds a bit strange Anna." He didn't doubt his sister's sanity; he just found the whole thing a bit far-fetched. Anna had been working very hard lately…

"Castiel! I am not insane! I know what I saw. I looked through his paperwork later, and do you know where they transferred him?" She gave him a glaring look, slightly off putting considering she was still crying.

"Where, Anna?" Cas asked quietly. He knew he wouldn't like the answer. It was going to be something horribly cliché like…

"Location: Undisclosed." There it was. He'd seen this movie before. It involved running, a lot, and probably someone dying.

The fear bubbled up inside him, threatening to eclipse his already slipping grasp on his sanity. This conversation was not going the way he had hoped; in fact it had gone in a whole direction he hadn't, in all of his very large imagination, seen it going. He suddenly felt the need to comfort his sister, to make her feel safe and comfortable, even though inside he was freaking the fuck out.

"Alright, that is strange, I'll give you that. But what does all of this have to do with me? I haven't, ah, leaked anywhere, and just because he had similar symptoms to me, doesn't mean we have the same thing." He squeezed Anna shoulder, smiling softly. "Everything will be fine, Anna." She just nodded, laughing softly.

"Just please, Castiel, if anything changes, please tell me. You aren't going anywhere near a hospital until I'm sure you're not gonna be carted off and never seen again." Anna closed her eyes, running her hand over her face, once again sifting her fingers through her copper strands.

"I will, Anna. Um, is that all? I'm really tired and you should go to bed as well, we'll talk more in the morning, ok?" His phone beeped twice, indicating a text, startling them both out of their tense conversation. He swiped it open, expecting the only person who had his number, and was not disappointed. It was a picture of Gabriel's smiling, happy face, with his arm wrapped around another person. He looked at the text Gabe had sent with it.

This was the guy I was gonna hook you up with bro. Your loss ;)

He stared at the picture, assessing the guy Gabriel had attempted to pimp him out to. He was fairly attractive, in a moody, wrong side of the tracks kind of way. He had short, dark blonde hair, tanned skin and the greenest eyes Cas had ever seen, even though the glaze of the photo. A shot of arousal ran through him, and he tensed, awaiting the tell-tale swell of his erection. His reaction must have alerted Anna, because she grabbed the phone out of his hand and whistled appreciatively. Mother figure or not, she was still his sister.

"Wow, what a hotty! You sure you don't wana catch the end of that party, Cas?" She grinned cheekily at him, nudging him in the ribs as she handed his phone back. He looked at the picture again, and another pulse of arousal shot through him. What was it about that guy?

He said goodnight to Anna, retreating to his room for what was probably going to be another fap fest, in order to placate the sex gods currently inhabiting his pants. After brushing his teeth and getting ready for bed, he peeled off his tee shirt, already too hot to be clothed. His phone buzzed again with another picture, this time of the mystery man and Gabe laughing at something he couldn't see.

He felt his heart clench at the sight, and he felt his stomach grow warm and soft. It was an unusual feeling, one he hadn't experienced before. He had just grabbed the bed sheets to pull them back when he felt it, a warm wetness easing down his body, and for a moment he thought, in horror, that he had suddenly developed stomach flu. A slight cramping feeling, somewhere near his perineum, and then… warmth, spreading slowly out of his small opening.

He placed a shaky hand, palm down on the bed to steady himself, and brought the other behind himself, slipping his fingers under the elastic of his sleeping pants, and around to his hole. Very slowly, he eased his hand down the cleft of his ass, breathing out a shuddering gasp when he felt a watery, lubricating substance touch his fingers. He ventured further still, and when his finger touched his fluttering hole, he gasped loudly when he felt another volley of liquid leave his body.

Fuck. He was leaking. Well that just about summed up his life.