An AU fic, but most of what happened in the show has actually happened in real life. Except in this version, Bobby is undead/immortal (think Davey Jones without the sea, instead he can leave his house/yard once every 10 years). He made a deal with an ANGEL to live as a central knowledge unit. Dean and Castiel have been together since season 5 (in my last story 'Teaching an Angel to be Human') and their 'togetherness' is out in the open. The threat of the world ending is gone, but the Winchesters and Cas are still hunters for their own little team. Cas is still a full-fledged angel, btw.

Warnings: Dean/Cas coupling, my very first attempt at Mpreg, and AU type stuff. Don't murder me over the differences.

Ooo-ooo-ooo-ooo-ooo

"I'm starved!" Sam groaned loudly, "Cas, wanna go with me to the diner?"

Castiel looked up from where he had been gathered in his thoughts. "No thank you, Sam. I'm all set. I just watched an educational segment on the female pelvic exam. I'm rather nauseated."

Sam chuckled to himself, heading out the door while the angel stood up and decided to walk out to the back porch to get some fresh air. Maybe he'd been stuck in the house too long. It'd been raining all week. The sound of it pattering on the porch roof was relaxing, but the weather made it unpleasant to go out in. Yes, normally rain or snow had no effect on Cas, but lately, especially today, he wasn't feeling like himself. He was cold, then hot and sweaty. His heart fluttered for no reason and he was developing headaches. The nausea was new, just kicking on hours ago. But it hit like a train.

When Dean came home from his 'day job' of setting well-behaved supernatural beings up with ordinary human lives, Cas had just left the bathroom. He hadn't vomited since back when he was human for a short time. Dean noted that his angel's face was pale, and he looked tired. Though Cas didn't have the need for food, his vessel still had a stomach full of bile to facilitate vomiting.

"You okay, Cas?" he asked, clearing the space between them to pull the angel toward him, sharing warmth between them.

Castiel nodded, he felt like he did when he entered the room of Pestilence, without the internal bleeding. His lower abdomen was tender to the touch, but it was nothing terribly painful.

"You sure? You look like Hell."

"Thank you, Dean. Now I feel better." Cas replied with noted sarcasm. Damn he's so moody lately. I can't crack a joke without him getting offended. I thought being with a guy would spare me the hormonal problems.

"Jesus, are you on your period?" Dean asked, regretting having said it almost immediately. Cas sighed in clear annoyance.

"No, Dean. That would be impossible. Now if you'll excuse me, I'm going to sleep." He said gruffly, turning to walk to Dean's bed.

Dean's eyes widened. He's going to sleep? Why?

"When did you start sleeping?" Dean asked, unable to contain his immense confusion.

"Four days ago. Anything else you want to take down?" Cas replied sharply. He sounded like he did back when he got hammered drunk and was being an ass to everyone, back when God abandoned him down here on Earth.

"Hey, are you okay? I'm sorry. I'm not trying…I'm just trying to fit the pieces together. You're sick, and now you're sleeping? I'm just a little worried, Cas."

Castiel sighed again, this time it was a soft sigh, one of forgiveness. He returned to where he was before, in front of Dean, embracing the taller man, placing a kiss on his cheek before resting his head against a strong shoulder, closing his eyes for a moment.

"I'm sorry, Dean. I don't know what got into me. It's probably some sort of vessel bug. I'll be okay. I just want to sleep now."

Dean walked with his angel, helping him into bed and laying beside him, snuggling the weak body before him.

Ooo-ooo-ooo-ooo-ooo

Weeks went in just like this, with Castiel very tired and vomiting before it all seemed to stop. Dean had been on the verge of making Cas see a doctor. That would have been odd to go to an actual hospital, but Bobby had connections with people that could provide medical assistance to demons. Why not angels?

But the last time that Cas threw up, he seemed to go back to his old self. He was relieved by it, being that Dean, Sam, and undead Bobby were up his ass so much about his health. Castiel loved that they were concerned, but they didn't act this way when a human was sick. Yes, it was very odd for him to be ill, but the constant pokes and prods for answers didn't help.

Ooo-ooo-ooo-ooo-ooo

"Do you smell that?" Castiel asked from Bobby's study. Dean wasn't home but Sam and Bobby both were present in the same room. They sniffed the air and noted that all they could smell was dusty old books. Castiel insisted that he smelled honey. Bobby and Sam both assured him that the closest source of honey was maybe two miles away.

"Yes, that's where it's coming from." Castiel agreed. He could smell the honey from that far away. The scent was sweet and natural, almost made him hungry just to smell it.

"You can't really smell two miles away." Sam scoffed, not quite stating and not quite asking.

"It must be this new soul that's inside me." Castiel said calmly, to which both Sam and Bobby locked eyes on the angel in concern.

"What are you talking about, Cas? What soul?" Sam asked. It was odd how nonchalant Castiel was when he said this. Normally, people would panic about having a 'new soul' in them. It didn't seem to phase their angel at all.

"I have a soul in my vessel. I know it isn't mine, because I don't have one. I'm wondering if a ghost got confused and tried to walk through me. Everyone knows that entities with no substantial body can pass through an angel within a vessel. It's like a sinkhole."

"You're saying that there's something human trapped in you?" Bobby asked, concerned and confused.

"I'm not sure. I know something is different. I can feel it." Cas said, very sure of himself, yet also rather confused.

After two hours of running hunter-invented tests to find out what foreign spirit got lost in Castiel's void, they were no closer to finding the answer than they'd been. It wasn't a demon. None of the demon artifacts caused the slightest irritation. It wasn't a ghost. It seemed like it was nothing. Cas was the only person that could sense anything amiss at all, and as far as Bobby and Sam could see, it wasn't something of a different world.

"Maybe you have a flu. Do parasites have souls?" Sam asked, knowing how foolish that question sounded before even asking it. Both of the other men in the room shook their heads to say 'no.'

"Sam, it feels like one of you. Not dead. It's…alive. Alive and somehow, somewhere in here." Cas started, jerking his thumb toward his torso.

"Maybe you're pregnant." Sam laughed, drawing a sudden snap in Bobby's eyes. The old man stood and started looking through his books, no longer interested in what Sam was joking about.

"That's not possible." Cas replied, not getting the joke. It isn't possible. Angels don't reproduce, at least I don't remember knowing of it. And the human male form I'm in doesn't have the needed organs for harvesting any young.

"Apparently it is." Bobby said, looking up from a book he was scanning.

Both the angel and Sam looked at Bobby like what he was saying had to be a practical joke.

"What?" they said in unison.

"Cas, I've been doing some research since when you started getting sick. Dean was worried. I couldn't put my finger on it until... Sam, get the hell outta here, ya idjit." Bobby continued, sending a curious Winchester out of his study before continuing his speech with a now scared angel.

Ooo-ooo-ooo-ooo-ooo

About 20 minutes later, Castiel emerged from Bobby's study, into the kitchen where Sam was waiting in earnest. Cas's bright blue eyes met with Sam's before looking away with a sigh.

"Well, what's going on?" Sam asked, trying to be delicate about the insane lore that might be coming true right before his eyes. Without trying to, he gave Castiel a quick looking over, not noticing anything different about his appearance, other than a more healthy look to his skin, which Sam brushed off as just Castiel's normal glow, and that Sam hadn't noticed it as much until after Cas had been sick.

"Well…Bobby thinks I might be… with child, Sam." Cas said, voice full of embarrassment.

"What? Really? How? Are you? I mean, how do you find out? How far along-" Sam was the only one excited at this moment. All of his questions bombarded the angel's already scattered thoughts.

"I don't know, Sam. I don't know. This isn't something that happens…not often. Bobby said there was only two other records that contained validity. Apparently, the eclipse last month had something to do with it."

"How?" Sam asked, thinking that this sounded too much like the X-Files.

"Apparently the other two Nephilim were conceived by intercourse during an eclipse. Last month…Dean and I… we mated during the eclipse, outside, in direct contact when the eclipse was total. Dean thought it would be…just a great idea." Cas said, terribly uncomfortable with discussing he and Dean's sexual escapades with Sam.

"Were the others…men?" Sam asked. This seemed so strange. They'd heard of shape shifting hybrids, and many other supernatural hybrids. He'd never heard of angels and humans, in male form, creating children, though.

"No, they were women. Angels fell to Earth in the Epistle of Jude and impregnated human women. There's only two cases that were actually followed in old lore."

"So…how does that work with you not having the…stuff you need?" Sam asked. He didn't know everything about women and pregnancy, but he did know that there was always an egg and uterus involved, unless it was due to asexual reproduction.

"I'm an angel, Sam. I think we can throw human logic to the wind, here. My internal organs adapt to my needs. I can have my heart punctured, be blown to bits, and I can survive. It's not far-fetched to believe that I can possibly develop new organs were none were previously."

"This is…out of this world, man." Sam smiled, scoffing to himself, trying to control anything offensive he thought might hurt Cas. He'd been around pregnant human women before, and sometimes they were a little sensitive. "So, you're pregnant?"

"I don't know for sure. I know I feel strange."

"Can you take a pregnancy test?" Sam asked, pointing to the door, silently offering to go to the store and pick one up.

"No, Sam. I'm not a woman. Bobby is gathering up some things. He thinks he has a way of checking to be sure. He assured me that it would be non-invasive and not painful."

Without thinking, Sam's hand extended forward, flattening a palm over his friend's stomach, earning him a very surprised look from the angel before him.

"Sam, please. This is strange enough without the touching."

Ooo-ooo-ooo-ooo-ooo

Sam went with his friend into Bobby's study, nearly 30 minutes after their little talk. He could see that Castiel was a mess, a confused mess. Sam and Bobby were both just as confused, but the two of them felt that they needed to maintain an air of calm. Cas had been asked to lay back on the old bed that Adam slept in years ago, before he became Michael's vessel. He'd pulled his shirt up to his ribs and twitched when Bobby placed a cold stethoscope against the exposed skin of his abdomen. He moved the end around a bit, pressing in at certain points, while Sam looked on like a concerned dog, eyes darting from Bobby to Cas.

"Balls, there it is." Bobby muttered, taking the ear pieces out and sitting the steth down on the floor. "You got two heartbeats."

Castiel sighed, a long, sad sigh. He sat up and pulled his shirt down, almost imagining that there was a tiny lump of something he could feel inside. No, it wasn't his imagination. There was nothing visible happening, but as soon as Bobby mentioned another heart beating, the angel mentally connected with whatever it was causing this heartbeat. It was something very small, and very much in need of his care. It felt just like any other human that he could sense, but tiny, almost ignorable before today. It had a heart, a spirit, and there was rapid cell division taking place. It was almost like watching the human solar systems form so long ago, and now it was within. He knew that Bobby was not wrong. Though this made absolutely no sense, it was true to say the least.

"Are you sure, Bobby?" Sam asked. "Is there anything else it could be?"

"Not unless he grew an extra heart by his liver." Bobby replied smartly, muttering 'idjit' under his breath as he walked out of the room.

"Cas?" Sam whispered, breaking the silence that hung over the room. His friend hadn't moved or looked up from the floor since he sat up.

"How am I going to tell Dean?" Castiel begged, wanting a way out. This can't be happening. It's impossible. My vessel is male. Dean never wanted this. He always said things like that, since the time he left Lisa and Ben, he didn't want to put himself in that position again. He's going to run. I'm going to be alone, and this thing… "He's gonna…leave me." Cas sobbed, hormonal, emotional, and overwhelmed.

Sam had never seen anything like this, but when Death returned his soul, he used it everyday. He could see Castiel's point, and the reason behind his sudden worry. Sam knew that Dean loved Cas, but he'd also heard before that Dean expressed he didn't want to be a father. This was one of the strangest conversations the younger Winchester brother had ever been privy to. Standing there at an awkward crossroad with a friend, his brother's boyfriend, and an angel, all the same guy. He'd never seen Cas drop so much as a lip quiver of worry or sadness. Now, the pillar of self-control smashed inside, and Castiel's usually stoic nature was frazzled, leading the man to sob like a 10 year old girl.

"No." Sam said, not sure of what else to say as he sat down and placed an arm around his friend's small, trembling frame.

"Yes…I know it." His voice cracked, causing him to squeak and bury his face into Sam's shirt. "He's going to bolt. I was so happy. Why did this have to happen? It doesn't make sense, and it just shouldn't be. I'm going to be all alone."

"Hey, I don't think so. He loves you. More than anyone else. He's not going to leave you. You just have to take this one step at a time. Tell him."

"What if you're wrong? What if-"

"Look, if I'm wrong, and he leaves you, you can count on me. Right?"

"Thank you." Cas sobbed again.

"Yo!" Dean yelled excitedly, bursting into the room. His eyes widened in surprise, seeing Cas leaning into Sam for support. Sam motioned to his brother, pointing out that he and Castiel needed to talk.

"Cas?" Dean whispered, loud enough for the angel to hear him. Cas looked up at Dean with bleary eyes.

"Whoa? Somebody die?" Dean asked, looking at Sam for some sort of answer.

The angel shook his head to say no, sucking in his lips and taking a deep breath, standing and approaching the love of his life.

"What do you have going on? You've been acting freakin weird, man."

"Dean, you know… I love you-"

"No, no no. Don't get all Jerry Springer on me. Is it somebody else? You sneaking around on me?" Dean asked in defense.

"Stop. No, I'm not seeing anyone else. You know I'm not."

"Well? Sammy?" Dean stood expectant. Sam slowly backed away, still in the room but noting that he wasn't going to take part.

"I don't know how to say this. The house is going to be a bit more 'crowded', if you catch my meaning." Cas started, coaching himself mentally to take deep breaths.

"Oh, dammit! Did Sammy bring home another stupid dog?"

"No."

"Cat?"

"No."

"Pig, ferret, demon-"

"Dean, no. I meant for us…because…I'm pregnant." Castiel stated as quickly as he could string the words together. Saying it out loud sounded even stranger than thinking about it.

"Ha! Nice one, Cas. You're getting better at this joking thing."

Cas shuffled uncomfortably, looking from Dean to somewhere off in the distance. This was not going to be easy to prove. "I'm serious. Your spawn is growing in me, quite rapidly as it were."

Of course, Dean didn't believe this a bit. It wasn't possible, and he was sure that Bobby and Sam were playing along with an elaborate prank. When nobody laughed, Dean jerked his head to the side, raising an eyebrow as usual when he was confused. "Cas, it was funny for a second. Knock it off."

"I wish it were that simple. I'm not joking. I don't know how to explain. I don't understand it myself. But something alive is taking up space somewhere around my vessel's intestines."

"Maybe you just have to take a dump." Dean stammered.

"I think I would know the difference." Cas said, looking sickened. "As much as you didn't want to have children, this is happening. I'm no happier about it than you are. I know how freakish I am." Cas muttered, looking at the floor, starting to lose his composure. His eyes were starting to well up again, and he was trying anything to remain in control.

Bobby and Sam stood in the same room, arms crossed and uncomfortable. Neither of them wanted to get in on it. Both actually would have rather melted into the walls. Balls, Bobby thought, why wasn't melting into the walls something the undead could do? It happened in the movies.

"Freakish? Ya think? Cas, you're a dude! A duuude."

"I'm sorry!" Cas snapped, trying to pretend that his voice didn't squeak.

Before Dean could say another stupid thing, a flutter of wings told him that his Cas was gone, and now all that stood before him was an irritated Bobby, and sullen Sam.

Ooo-ooo-ooo-ooo-ooo

"Meg?" came a gruff voice in the dark.

"What are you doing out here, by yourself?" She emerged from around a tree with a smile crossing her face. It was strange. Cas used to hate her, used to think to himself how much she smelled of sulfur. Now, her smell and her tactless demeanor didn't bother him anymore. He owed Meg an awful lot for how she'd assisted the Winchesters and himself in the past.

"I could ask you the same question." Castiel replied as Meg sat down beside him on his usual bench in the park. This was the first time he'd gone to this particular place at night. It was even more peaceful than during the daytime.

"Hmmm, up to no good, I suppose." Meg replied playfully. "I missed jah, of course."

This brought a smirk to the angel's lips. As bad as he was feeling at that moment, Meg did have a very genuine way of speaking.

"We're not alone." She whispered, eyeing the surrounding area. Cas could see her eyes working apart the darkness, sniffing. "I smell…human. Did you bring your Ass with you?"

"No, Dean's not here."

"Eww, then you obviously didn't wash off after your last…encounter. I smell him all over you." Meg said, wrinkling her nose even though she wasn't disgusted.

"It isn't that, either." Cas sighed, and noticed her eyebrow raise. She looked at him, up and down, trying to scan out what might be different, same way that she scanned the darkness of the park only moments ago.

"Well, its coming from you, its human, and its Winchester…so…" She was piecing it together, now. Meg was not a stupid demon. Manipulative, maybe. But she wasn't stupid.

"Well, everybody else knows. I might as well tell you that…I'm…expecting a baby."

Meg's eyes grew to twice their normal size. She made an awkward snorting noise, and then tried to blink away her confusion and surprise. She definitely did not like when she was at a loss for answers. No, of course she'd never heard of male angels having babies, and had no idea what Cas was talking about to save her life, but she would never let on.

"What's next, Clarence? Weddin' Bells?" She joked, but stopped when she noticed that he wasn't happy about this. That's weird. Isn't reproducing usually good news for humans…or angels living human lives.

"Not all is well in paradise, Meg." The angel whispered, lowering his gaze to the grass. He felt one of Meg's arms slip around his waist while the other stroked fingers through dark, soft hair when he leaned into her comfort. This was a strange scene indeed, one that Meg reserved only for Cas. They'd become friends over the years. Meg was not soft-hearted. Frequently, the two of them shared a love/hate relationship, but generally what the two of them had was what any modern human would call an 'epic bromance' save for Meg being female. Generally, she couldn't care less of humans or their stupid feelings, but she felt that Castiel shared an understanding, more of a kinship with her.

"Tell me what happened." She whispered, trying to mask the tone in her voice that said all too clearly that she was already furious with Dean.

Castiel explained to Meg to the best of his ability, surrounding the mysterious conception of his and Dean's child. He expressed his concerns to her, regarding whether or not he or the child would survive, how long gestation would last, what labor would be like, everything. He told her about Dean's reaction, to which she promptly broke the arm rest off the park bench. They talked about it until the sun was peaking over the horizon. She convinced the distraught angel to return to her apartment with her, and told him that he could stay with her as long as he needed.

For a demon, Meg was an incredible host. Her apartment was clean, well-furnished, and it smelled like apple cinnamon. She had an unusual amount of candles burning to mask why she smelled of sulfur. She was even quite successful in the Scentsy candle business in her spare time. Imagine that, demons selling sweetly scented wax.

Her spare bedroom was set up as perfectly as a catalog, to which she explained that even as a demon, she was still a girl. She liked order and tidiness. This little place in which she lived gave her the freedom to be creative, something that centuries in Hell never allowed. Cas caught himself feeling very amused at her decorative skills, aside from the snake tank that was just outside of the living room. Of course she would have kept a snake as a pet. She was a demon, afterall, and a demon that was very fond of symbolism to boot.

"Get some rest, babe. I gotta go to work." Meg muttered, pulling on a striped shirt and grabbing her DMV work badge off the door handle to her room. Yes, Dean had gotten her a cover job at Castiel's request. She was one of the reformed, 'on good behavior' supernatural beings.

"Meg?"

"Yeah?"

"You don't find any of this weird?" Castiel asked her, from the spot on the feather-down bed he was resting on.

"I'm a demon. Weird is my everyday."