This is a Samifer and Dean mpreg oneshot. I used the name Lucifer, but just know that his vessel is Sam. Also, I wanted this to go up early this morning, but last night I rediscovered '90s and early 2000's boybands and couldn't stop.
Suggested by: PrincessPeach211
Dean's glass clinked as he set it down on the table a little harder than he meant to. He immediately filled it again, and downed the amber colored liquid. Self hatred filled his mind.
Lucifer looked at Dean from across the room, just waiting for Dean to look up and notice him. Even though he was possessing Sam, and had complete control over his body, Sam's feelings for Dean were able to infiltrate his power. Lucifer walked forward.
"Heya Sammy," Dean said. His voice was soft, almost heartbroken.
Lucifer thought about letting Sam have what he desired.
"Dean, are you aware of how Sa— I mean, I feel about you?"
Dean looked at Lucifer oddly, "What do you mean?"
"Stop me if you don't want this." Lucifer slowly leaned in until his lips touched Dean's. Lucifer wasn't surprised that Dean kissed back after the initial shock passed over. He figured Dean felt the same. Why else would a man hate himself so much? Dean pulled away, breaking the kiss.
"Sammy, is this real?"
"Yes, Dean, what I feel for you is definitely real. Now, let me get your mind off of everything, okay?" Lucifer said. Dean leaned back in, connecting their lips and wrapping his arms around Lucifer's neck.
***
Dean woke up the next morning in bed. He could sense someone behind him. Quickly, he racked his brain to remember who he brought home last night. ...Sam. A smile formed on his lips as he remembered the events of the night before. Finally, everything was out in the open, and everything was fine. Dean got up and went to the bathroom for a shower. Once Dean was out, Sam went it. The brothers didn't exchange any words. They didn't talk about what happened the night before. Nothing.
***
Two weeks later, Dean woke up in the middle of the night and ran to the bathroom. He felt like he was vomiting his guts out for an eternity. After he was finished, he rested his head on the cool toilet bowl. Lucifer walked over and stopped at the doorway.
"Are you okay?" Lucifer asked.
"Yeah, I think so Sammy. I don't know what's wrong though. I didn't drink that much earlier, did I?"
"I'm not sure. I wasn't keeping track."
Dean eventually made it back to bed. He was exhausted.
The next morning, he woke up again with a pounding headache. He still pushed through and helped Lucifer with their next case.
Lucifer went out to get lunch for himself and Dean. He walked into the motel room with hamburgers and fries. He set the bag down in front of Dean. Dean immediately wrinkled his nose at the smell. His face turned a slight shade of green.
"Sammy, what the hell is that?"
Lucifer gave him a weird look, "A hamburger and fries?"
"What the hell is wrong with me?"
"I think you should go to a doctor," Lucifer suggested.
Dean figured he'd take Lucifer's advice and got into a doctor the next day.
"So, Mr. Winchester, I'm not quite sure how to explain this, but you're pregnant," the doctor said.
Dean was shocked, "Are you sure?"
"Yes, I'm quite sure."
The doctor explained what to expect and do over the course of his pregnancy, then sent him home.
"Hey Sammy, I'm back," Dean said as he walked back in.
"What did they say was wrong with you?"
"I'm... pregnant," Dean still couldn't believe the news.
Lucifer was just as shocked as Dean. He already knew that he was the only person Dean has been with lately.
"I'm guessing you already know it's yours?" Dean continued.
"Dean, I have something important to tell you."
"What is it Sammy?" Dean walked in and sat across from Lucifer.
"That's the thing, I'm— I'm not Sam. I'm actually Lucifer; Sam is my vessel," Lucifer said carefully.
Dean couldn't believe what Lucifer told him. "Why the hell did you keep this from me?"
"I didn't plan on doing anything with you. I was just going to pretend to be Sam for a while then let him go. Everything would go back to normal, but his feelings for you were too strong. I thought if I gave in, they would disappear."
Dean smiled, "Sam really does love me?"
"He does. His feelings are strong enough for me to feel them. They've never diminished."
"And you're eventually going to leave his body?"
Lucifer nodded, "But not before this," he got down on one knee, "Dean, will you marry Sam? I know he wants it."
Dean stared at Lucifer in shock. Tears burned his eyes and streamed down his cheeks, "Is he in there with you?"
Lucifer nodded, "He's never left. He know everything I've done since he became my vessel."
"Then tell him that I said yes, 1000 times yes."
