Dean and Sam arrived in the bunker and walked to the kitchen. Jacks plate of food was left untouched. Dean grabbed his sausage and ate it like a hungry badger. Sam back handed his chest.

"That's Jacks'," he scolded.

"You didn't take me out on our breakfast date," he ate another piece. Sam shook his head at him.

The brothers walked around and eventually found their friends in the library. Dean acted cool. He sat in a chair and tried to put his feet on the table. It was difficult and awkward with his belly, but he got it and it was very uncomfortable. Luckily Sam forced his feet down so he didn't have to hurt his pride. Jack sat next to Castiel who was simply standing. Cas just watched Dean.

"Jack and I've been talking," Cas stepped forward,"and I want to stay here to help you with your pregnancy and your pup," the brothers looked at the boy. He averted his eyes.

"I don't think that's such a good idea," Sam turned to Castiel.

"I understand that you guys don't want me here because of my plan for the nephilim," Cas looked to Dean, "but I want to help you, Dean. I'm willing to give up my search for it," Deans heart raced. Dean looked at Sam. Sam pushed his lips together and lifted his eyebrows unsure of what to say.

"Hey, ah, Jack," Sam called out. He met Jacks gaze. He jerked his head back, gesturing for him to follow. Jack nodded and they left.

Dean and Cas were left alone. Dean leaned over and rested on the table.

"Why do you want to stay?" He asked.

"To help you raise your pup," Cas answered.

"Why do you want to help raise my pup? I can do it on my own. I don't need an alpha,".

"I know you don't. You're strong and perfectly capable of protecting yourself and your pup on your own," Dean smirked. "But you have to admit you're in a dangerous job. Even if you kept your pup in this bunker it's whole life, things will still be after it. And it will take one slip up to... it just takes one mistake to end a life. I want to be there to prevent that mistake or become the barrier between the world and the pup. I want to help you protect your child,".

Dean looked at Cas.

"You'd help raise this pup even if it wasn't your own?" Dean wondered what Cas could possibly get out of this.

"Jack isn't mine but..." Cas paused and looked around for words, "he is," he turned to Dean hoping he would understand what he meant. Dean shook his head.

"You don't have to step in as alpha, like you did with Jack,"

"You don't understand, Dean. I'm not looking to do that," Cas answered, "Plenty of children have been raised by one parent and they turn out amazing. It being your pup, I'm sure it will have no problem not having its alpha sire,". Dean looked to the ground. He rubbed his face and shook his head. "I want to be there for you, Dean. Like I said I want to help you,". Dean was quiet in thought. He covered his mouth thinking. It took a moment but he finally spoke up.

"You'll stop searching for the nephilim?" he didn't look at Cas.

"Yes," Cas answered. Dean was quiet again.

"You want to help,"

"With all of my power,"

"And what do you want in return," Cas gave him a confused look.

"Nothing," Cas blinked away the surprise, "I would never ask for something in return. I just want to help you,". Deans cheeks grew flushed as he smirked.

"I like your deal better than Crowleys," Dean joked.

"What?" Cas asked. Dean told him how Crowley wasn't dead and how he raised a spirit to get Dean alone and make him a deal to be his bonded beta in exchange for the pups safety. Cas did not like that.

"So not only is that demon alive; he wants you to bond with him," Cas's voice didn't change much but Dean could tell he wasn't happy. "You're not considering it are you?"

"Honestly... I did think about it. It made me sick to- become his omega- but he was right about a few things... kinda along the same lines that you were talking about," Dean tried to stay vague.

"Did you tell him yes?"

"No. Like I said: it made me sick," Cas relaxed.

"Bonding- huh," Cas looked away from him. He paused, thinking, "Dean, why did you pretend to be in heat?" He asked. Dean took in a deep breath and looked around for an answer.

"I..." how was he going to answer? I wanted to remember having sex with you? I wanted to be fucked by you? I wanted to be your cocksleeve for a while? "I wanted... to be close to you,". Cas smiled a little. They both just looked into the others eyes. Dean smirked and chuckled, "if you bonded with me when I asked we wouldn't have to worry about Crowley," he joked. But Castiel just looked at him. It was quiet.

"Do you want me to bond with you?" Cas asked. Dean looked right at him. He wasn't sure if he was attempting to make a piss poor joke or not. Dean couldn't let his hopes get up but he had to try.

"Yes,".

Cas nodded and reached for him. Cas kissed his neck, and started pulling Dean to his room. As they entered they wasted no time getting undressed. Cas was naked first and quickly turned his attention to Dean who was still playing with his belt. Cas pulled Deans arms back as he undid the buckle himself. Cas pulled the belt quickly. It slid out of the belt loops and fell on the floor. He pulled down both his underwear and pants. Dean stepped out of them but was pushed on the bed, bent over, holding himself up with his arms. Cas leaned down and started eating him out. Everything was happening so suddenly. His eyes filled with over stimulated tears as Cas's tongue licked up the producing slick. Dean knew that he wasn't playing around. Cas had been gentle and tender the past week when he was eating his meal, but now he was an animal. He licked and gummed and sucked as if he was in danger if he stopped.

"Ca-Cas- slow down," Dean could barely speak. Castiel didn't listen. He stuck three fingers inside him along with his tongue. Dean gasped as the fingers all explored him, touching every wall and nerve they could get to. "Too- m-much," he was choking on air. His knees buckled and he fell on the bed. Cas exited him to push him up onto the bed. Dean was on his elbows and knees, his ass sticking in the air, dripping with Cas's' saliva and his own slick. Cas returned his mouth to his slit and soon came back the fingers. The more Cas played with him, with wider Deans legs opened. Dean didn't notice but with his free hand Cas was getting himself ready. His knot was already big. He pulled out of Dean and quickly flipped him on his back. He put the omegas legs up laying against his shoulders, then quickly thrusted in giving Dean no time to adjust. Dean moaned loudly as the knot entered him, almost already catching. Cas shoved his tongue down Deans throat as he moaned. After whining Dean kissed the angel back. They fought back and forth for dominance. Cas was winning. Cas wasted no time playing around. He pulled away from the kiss and gripped onto Deans hips. He pumped into Dean at a fast pace. Deans breath hitched with every thrust into him. He wrapped his hands around Cas's' wrists. Cas's' knot was finally stuck inside of Dean, and he pushed it in more, trying to get any amount of friction in him.

"Show me," Cas didn't mean to order him.

Dean instinctively lifted and turned his head for the alpha. Cas went down and started sucking on his gland. Deans heart raced. Cas started gumming at the spot, loosening and numbing it. The muscles became warm and relaxed. Dean moved his hands and clawed at Cas's back, bracing himself. It was going to hurt. Everyone said it did. But they also felt euphoria and nirvana while being bonded. Dean took in a breath as venom bubbled into Cas's teeth and saliva. Cas thrusted in, and nipped at the numbing flesh. Deans would have started begging if he didn't start to orgasm. His toes curled and his legs shook, his walls spasmed around Cas' cock. Cas felt his own climax coming. It was almost time. He wasn't thinking, his mind was almost gone. He didn't feel like an angel, he felt human. And he liked it. Out of his sexual experiences, being with Dean was the best. He wanted his omega to need him. He wanted his omega to beg for him to knot him. And his Dean was happy to oblige. He felt so close to him. He never wanted to be away from him. He wanted to make him his. He was going to make him his.

He scraped his teeth against Deans, now tender, flesh. Dean couldn't feel it, all he could feel was the electric shocks riding through him. Cas was right on the edge.

"Knock knock! I hope you two aren't having too much fun in there," someone knocked on Deans door.

Cas was spooked and came inside of Dean. It only took a few seconds but it was too late. His teeth no longer felt warm with venom. He was pissed. He tried to get off of Dean to see who ruined it but was still attached to him. He looked at the man below him. Deans pregnant belly was covered in his own seed. His chest bounced up and down regaining his breath. His face flushed red, and his eyes were closed loosely. Cas was disappointed that he didn't bond with his love. Then Dean opened his green eyes and looked at him. His hand reached behind Cas's head and pulled him down. A disappointed Cas was ready for a kiss, but Dean lowered his aim. He went right for Cas's scent gland and bit him. It stung him, but he was mostly confused. Dean licked at the little blood that trickled out. Dean had marked him.

"Dean," Cas whispered. Dean started to tear up.

"I want to be with you," he whispered back. His words shook the Angel. Cas started to get angry again. He forcefully turned Deans head and sunk his teeth into him. Dean jerked up and gasped. Cas just sunk his teeth in lower as Dean struggled under him. Cas knew it would be useless but he had to do something.

After a minute of clamping down on Dean, he finally let go. Blood dripped from his mouth as he looked at the marking. Dean took in sharp breaths as he reeled from the painful bite, tears falling from the corners of his eyes. Cas looked at his face. He was hurting. Cas's' body moved before he could think. He started licking up the blood from the mark as if he would if it was a bond. He started to leak his scent to comfort the omega. Deans jerking breaths became slower and deeper the more he inhaled and the more Cas cleaned him.

Dean milked Cas's knot as Cas cleaned up Deans mark.