Title: Beast of Burden

Author: Sesshomaru-gal

Fandom: Supernatural

Summary: One night of fun leads to nine months of misery for Dean.

Characters: Dean, Sam, Bobby, Castiel.

Chapters: 4

Status: Finished

Disclaimer: All Supernatural characters are the property of the CW network and Eric Kripke. I do not own any rights to the show. This fiction is for entertainment purposes only and I do not make any money off of it.

Notes/warnings: This is actually my first fic but I had to fix the format before I could post it. VERY GRAPHIC!demonic mpreg, long graphic birth, tortured/suffering Dean, profanity. I am very cruel to Dean in this particular fic, so be warned. This is not a wincest story. For those of you who are still willing to read this, thanks, and I hope it doesn't prevent you from reading my other fics. I don't know where this idea came from but it is the only really graphic/dark fic I intend to write.

Chapter 1

Venedy, IL

Dean and Sam are having a few drinks in a local bar after wrapping up their latest hunt. Eight men had been killed in the last couple of weeks and the brothers came to find out what or who had been killing them. They had come to the conclusion that it was a succubus that would make love to the men to harvest their sperm and kill them after the session. After they finally located the succubus they successfully killed her. Sam was finishing his drink while Dean was hitting on a pretty girl sitting at the bar. She had dark, brown and wavy hair, deep blue eyes and dimples on either side of her mouth when she smiled. She stood about 5'9" and had an angels voice. Dean asks if Sam wants him to hook him up with one of the girls friends but Sam declines, saying he will be waiting for him back at the hotel. It's late when Dean finally comes back to the hotel, clearly satisfied with his evenings antics.

One month later, Bobby's place

Sam and Bobby are sitting at the table eating bacon and eggs that Bobby had fried up. Dean comes back out of the bathroom and sits at the table. Bobby looks over at Dean.

"You hungry? I can fry you up some eggs if you want."

Dean glances at him, looking really pale.

"No, thanks. Not hungry."

Sam takes in Deans color and frowns.

"Dean, you should really eat something. You're not looking so good."

Dean sighs, starting to get annoyed.

"I'm fine, Sam. I'm just not hungry."

"Dean, you've been sick for weeks now. I really think you should see a doctor."

Dean stands up from the table, really agitated now.

"I'm not seeing a doctor. I'm fine, so get off my back."

He gets up from the table and heads for the door.

"I'll be outside."

He slams the door behind him as he exits. Sam looks over to Bobby.

"Bobby..."

"I know. Something's not right with him. Maybe we can talk to Castiel, see if he knows anything. Why don't you go outside and see if he's OK, he's been in and out of the bathroom all morning."

Sam gets up and goes outside. He wishes Dean would see a doctor. He just hasn't been himself. Last week a gorgeous girl was hitting on him at the bar the three of them went to eat at and he totally blew her off, said he wasn't in the mood. In all their lives he had never known Dean to pass up a pretty girl. He walks up and down the rows of junk cars looking for Dean when he finally finds him. Dean is standing with his right hand on a stack of cars, leaning against them with his left hand over his stomach. His eyes are scrunched shut and his face is a sickly green pigment. He quickly squats down next to the cars and vomits up what little there is in his stomach right as Sam reaches him.

"Dean! Are you OK?"

Extreme vertigo washes over Dean.

"I'm fine, Sam. Would you two just drop it?"

Bobby and Castiel come running up and Bobby addresses Sam.

"Is he OK?"

Bobby helps Dean into a standing position as Dean continues to hold his stomach with his left hand. He doesn't let go of his arm because Dean is really unsteady on his feet and he's afraid if he lets go Dean will just fall over. He really doesn't look good and hasn't been sleeping much, almost every night Bobby can hear him up getting sick. Dean rolls his eyes and answers before Sam can say anything.

"I'm fine! Will you back off?"

He jerks his arm away from Bobby and starts to head back to the house when Bobby grabs him again.

"Now I've had enough of this attitude, boy! You're going to stand here and listen to what Cass has to say. He thinks he knows what's wrong with you."

"I'm not in the mood for this, I'm going in."

Bobby moves in front of him and prevents him from leaving.

Sam's frown deepens as he sees something in his brothers eyes.

"You already know, don't you?

Dean glances at him for a second then snorts and turns away as Castiel starts explaining.

"About a month ago you two were on a hunt in Illinois. There was a succubus that was harvesting from men and then slaughtering them."

Sam speaks up, knowing Dean won't.

"Yeah, we found her and killed her. So?

"She wasn't the only one. There was another one, her mate. A lot of people don't know that a succubus and an incubus are really the same creature. They morph back and forth between the two forms based on their needs at that moment. The girl Dean met at the bar before you two left was the mate of the one you killed. She has actually caused trouble for many other hunters before Dean. They take the form of a succubus to harvest the sperm and morph into an incubus to implant it into the hunter."

"Wait, you're saying Dean is pregnant?"

"Yes."

They all look at Dean. A fresh wave of nausea washes over him and he rushes into the house. He barely makes it to the toilet before his stomach heaves. The others stay outside a few moments as Castiel's words sink in. Sam finally breaks the silence.

"So what do we do about it? How do we stop it?"

"There's nothing we can do but wait it out. That particular succubus goes after hunters that she feels need to be punished. She targeted Dean because he took the final shot to kill her mate. She instills this on them and makes them carry it to term. Their bodies start going through a transformation to allow them to deal with the labor and birth by the end of the first trimester. When it's time she comes and renders them unconscious while she collects the child. The contractions are strong enough to expel the child while the hunter is unconscious."

"So, he's basically going to turn into a woman?"

"No, the soft tissues surrounding his pelvis will just morph to allow the child passage. Everything else will remain the same."

"If she knocks them out for the labor how is it a true punishment? Wouldn't she want them to feel the pain and discomfort?"

"She feels that carrying the child to term will cause them enough misery without dealing with the actual birth. Also, in knocking the hunters out, she has full control of the situation without any interference."

"So we just wait around until she comes back?"

"Normally, yes. However, when Dean figured out what happened he went in search of her and killed her. So you and Bobby will have to help him through the labor and delivery. She is the only one that we are aware of that has done this and a succubus only collects the child they implant into someone, they never collect another succubus' child."

"Wait, is that where Dean went a couple of weeks ago? He just left and wouldn't tell us where he went. He was gone for a week."

"Yes. I believe he was trying to force her to stop it or tell him how to. When she refused he killed her, not knowing he would eventually need her for the delivery."

"So it's not impossible, he will deliver. He's just going to feel everything."

"Yes. I will help if I can. I will go try to find more information."

"Thanks, Cass. I guess we should go back in and see if he's OK."

Castiel leaves while Bobby and Sam go back into the house. Dean is sitting on the bathroom floor with his right arm propped on the side of the bathtub and his forehead is pressed into his arm. His eyes are closed tight and his left arm is held tightly over his stomach. He is really pale and drenched in sweat. He keeps getting cold chills running through him and feels faint. He is breathing heavy when Sam comes in and kneels down beside him. He starts rubbing Deans back with his right hand.

"Dean, why didn't you say anything? We can't help you if you keep this kind of stuff from us."

Dean turns his head to look at Sam, looking absolutely miserable. It is only at this moment that Sam sees something he hadn't seen before-Dean was scared to death. All this time that Dean was snapping at him and Bobby, it was only a facade to hide his fear. Dean is slightly panting and takes a minute to answer.

"You can't help me, Sam. There is nothing we can do about this. Besides, would you have believed me if I had said anything? I mean, how many times have you heard of this happening?"

"It would've been hard to believe at first but we would've figured it out eventually and we wouldn't have been so hard on you. We would've tried to make you more comfortable."

A tear runs down Deans cheek before he replies.

"It doesn't matter. I'm stuck with this and there's no stopping it."

He turns his face back into his arm and closes his eyes as cramps start painfully intensifying. He starts breathing heavy as he waits for the cramps and dizziness to pass. Sam continues rubbing Deans back, feeling his body shudder from the intense cramps.

"Come on. You need to lay down. Lets get you to the couch."

"No. I want to go upstairs. It's quieter up there and I'm getting a headache."

"OK."

Sam helps Dean up and gets him upstairs into bed. He comes back down to find Bobby sitting at the kitchen table. He goes to the fridge and takes out a couple of beers for him and Bobby and sits down at the table. He takes a drink from his beer as Bobby starts talking.

"How's Dean?"

"Miserable. I've never seen him this sick before. Cramps were really hitting him hard by the time I got him to bed. If he's known about this for a couple of weeks already why didn't he say anything?"

"Well he's scared, Sam. This isn't exactly normal. He has a lot to deal with over the next several months. I don't want him hunting until this pans out. He doesn't need to be out there getting careless and end up getting hurt. I don't want anything going wrong with him. He needs to just take it easy and relax."

"The way he looks today I don't think we will have to do much convincing. He looks like he just wants to lay down anyway."