Crowley smiled at Dean. His eyes temporarily glanced at the slightly exposed marking on his neck, before returning back to Deans eyes.

"Having fun?" He asked. As soon as he said it, Cas knew it was him who stopped their bonding. He wasn't going to call him out on it. He wasn't sure on how Dean felt about his brother and Jack knowing that they were sleeping together and considering bonding.

"Shut up," Dean looked at the bags on the table. He looked up at the red head, "this for me?"

"You and the babe,".

"What's a 'babe'?" Jack whispered to Sam. Sam shrugged.

Dean smiled and started opening up his gifts as if he was a child. Sam looked at Cas. Castiel watched Dean with a smile on his face.

"Ah, Cas," Sam spoke up. Cas looked at the taller man. Sam turned and walked away. Cas looked at Dean who was trying to figure out what damn flower he was holding was. He left him and followed Sam into the infirmary, away from everyone else. Sam was leaning against the counter as Cas walked in.

"Shut the door behind you," he did. Sam didn't want to ask this. He wanted to live in blissful ignorance. But it was too dangerous for Cas to be around if he was still planning on killing his niece or nephew.

"The nephilim," Sam took in a sharp breath, "are you going to kill it,"

"I promise to stop my search for it,".

"Yeah. I heard that,". Cas nodded and started to leave. "But Cas... what would you do if... you found it,". Cas looked at him then looked down.

"I won't find it," Cas shook his head.

"You know Dean and I... we have to protect it. Raise it. Train it. Just as we did Jack. At some point- it's going to be in the bunker. We are going to be protecting it," Cas stared at Sam, pleading.

"I know... I should never ask this but... why don't you just leave it alone?" Sam closed his eyes and shook his head.

"Please don't ask me to choose you over a pup. You know I can't do it,".

"Sam-"

"No- Cas," Sam got off the counter and ran his fingers through his hair, "you know what happened last time. The world was in turmoil- Jack was going to be used as a weapon. We have to be the ones to raise the pup! And we need your help!" Sam furrowed his brow and frowned, his face begging Castiel, "you don't have to kill it. Please, Cas. Dean can't do this alone! He needs his alp- he needs... you," Sam wanted his friend to understand. Cas paused, and looked down.

"You said that the world was in turmoil, that the child will be used as a weapon. That's going to happen all over again. Hundreds of thousands of people dying, rioting, scared to go out of their homes, all because you can't see past a pups face. This pup is dangerous. I understand that letting it go, and letting it be raised by someone else than you two is a plan that will turn out badly, but you have to let it go so I can stay with Dean," Cas rationalized.

"We know that- but it's a risk we're not going to take. We're not going to let it go so you can play alpha with Dean!"

"I'm not wanting to play, Sam. I want to be Deans alpha,". Sam paused. He looked at Cas. Cas looked back at him. "What?" Cas asked confused. Sam tilted his head.

"Do... you want to be Deans alpha? Are you... in love with him?" Sam didn't know if he was right. It was off on a limb but maybe... Cas looked straight into Sams eyes. There was silence. Cas pursed his lips into a slight frown. He nodded his head slowly. Sam finally understood. Cas and Dean loved each other. The morons loved each other and didn't know it. They didn't say anything because they're too scared to lose the other. Sam put on a stern face.

"What if it was your pup? Your pup the nephilim?" Cas scowled.

"Don't joke like that Sam,".

"I'm being serious. You love Dean but what if it was yours? What if it was your pup Dean was carrying, would you kill it then?"

"I don't even know why you're asking this," Cas turned away, flustered and frustrated.

"Answer me!" Sam was determined to find out if he would kill his own pup. Cas looked back at Sam. He led his head up.

"I would kill my own pup for the greater good," he doubled down. Sams blood boiled. He saw red.

"You- you fuc- piece of shit," Sam cursed, "Get the hell out of here!" His voice boomed so loud you could hear it in the next room. Cas stood his ground.

"I'm staying,". Sam jumped towards him and punched Cas's' jaw. Sam held his aching fist in his other hand. "You know that won't stop me,", Sam scowled. He paused standing there with Cas staring at him. He slowly walked to the counter, turning his back to the Angel. He dug through the drawers.

"Cas- you're my friend. And I'm going to ask you this one more time," he found it. A scalpel. He slit his wrist with little effort. He took his blood and started drawing on the white counter. "Leave now, and don't come back,". Cas didn't blink.

"No." He stated, "I'm not leaving Dean. I'm not leaving my omega,". Sam sighed as he finished the sigil. He turned back to Cas and looked at him, holding his bleeding wrist. Cas's eyes trailed down to his wound. He was caught by surprise. He looked back at Sam. The taller man lifted his cut hand above the sigil. Cas looked down on the counter. He saw the drawing in Sams blood. His eyes shot open as he lunged forward.

"Sam- wai-" Sams hand crashed down on the bloody mess. As soon as his hand hit, there was a bright flash of light.

Sams eyes were closed for what seemed forever. All he could hear was his blood dripping off of him. He was the only one in the room.

Suddenly there was a rushing of foot steps to him. Dean busted in, looking around.

"What the hell was that?" He demanded. He was followed by the others: Crowley, Rowena, and Jack. Deans eyes went straight to his wrist. He rushed forward and grabbed his arm. He briefly looked at Sam then to the counter. His face morphed into a stunned look. He turned his attention back to Sam. He dropped his hand forcefully.

"What the hell did you do?" Sam pursed his lips and said nothing. "Sam- what the hell did you do?! Where's Cas?" He started yelling. Jack walked up and saw the Angel banishing sigil. He looked at Sam in confusion.

"Sam... why did you do that to Cas?" He asked more gently than Dean did. Sam closed his eyes. His lips shut tightly.

"He said he would kill it," it was almost a whisper.

"What?" Dean demanded again. Sam opened his eyes and looked to his brother. He really didn't want to tell him.

"I asked him. If it was his pup, would he still kill it," Sam spoke in a low tone. Dean glared at him, his mouth slightly agape. "He said- if the nephilim was his own- he would kill it,". Dean froze for a second. He only stared at his brother. He swallowed and shook his head gently.

"You're wrong," he pulled from his brother, backing away. Sam frowned.

"I'm sorry Dean," he shook his head, "I wish that I was lying. I really do," he reached out, and grabbed his brothers shoulder. Dean jerked away from him. He looked at him. His eyes prayed for his brother to tell him something different. But he didn't. There was silence.