Oh baby. (Dean x Lucifer + Baby Sam)

Mind.

Dean and Lucifer were together for years now. After the whole thing woth being Sam's vessel, there was no way that Dean could ever say no to being the devils boyfriend.
Sam had recently gotten in a car crash, and Dean was full out pissed that he couldn't see him, and that his baby brother didnt listen to when to go to sleep. That's the reason he got in the crash.

Sam was waiting for Dean and Lucifer to pick him up, and now Dean was driving Lucifers car, instead of the impala. Since Sam wrecked Baby and which Dean was clearly pissed about.
He pulled up, and Sam got in, giggling and smiling softly, which was very usual for Sam. Usually has groggy and snappy when he was like this.
Dean frowned but smiled after, "Heya Sammy boy." Dean says, making Sam perk up and giggle.

"Hi!" He says, real jumpy and cheery. Dean smiled softly as he held Lucifers hand, and drove back home.
Sam was a bit fussy when they came home, making Dean stress a bit. He yelled at Sam about crashing Baby, and Sam was all over Lucifer, whining and lightly flailing his arms up at him, wanting to be picked up.

Lucifer refused and Sam started to cry, making him and Dean wonder what the hell was going on with him.
"Baby. Sweeetie." Lucifer says, calming Sam down, picking him up, and surprisingly, Sam was light.
Dean lightly frowned and rubbed his eyes. "Sammy we don't have time for this." Dean growled, making Sam whimper.

Lucifer sighed and nodded, looking at Sam, "Your brothers right Sammy baby." He says, as Sam whimpered, leaning on Lucifers chest, saying, "Mommy.." Dean frowned, growling. "Sam Winchester, stop playing games!" Dean yelled. Sam teared up and started to cry, whimpering softly.

"Dean Winchester..." Lucifer frowned, calming Sam down. "Dean. Here take Sam, I'll go call the doctors about Sam." Lucifer says, handing Sam iver to Dean.
Lucifer grumbled as he came back a few minutes later. "So. Sam has the mind of a toddler. And so. It's permant." Lucifer says.

"Great my brothers a fucking toddler!" Dean yelled, making Sam cry.
Lucifer picked Sam up, sighing softly. "Baby boy shh...its alright.." He says, looking at Sam.
Sam nuzzled up under Lucifers chest, then yawned cutely, pouting softly.
"Hi baby boy." Lucifer smiled, kissing Sam's head.
"M-mommy.." Sam yawned a bit.

Around the middle of the night, Sam woke up crying, and Dean groaned, getting up as Lucifer was already in Sam's room, calming him down.
"Baby boy..its Alright mommas here.." Lucifer says, holding Sam in his arms.

Sam had a pacifier in his mouth, sucking on it as he closed his eyes, Lucifer holding him like a baby in his arms.
Lucifer sang him a song, making him fall back asleep, Dean smiled, walking in. "As his vessel I think your very great with a baby Sammy." Dean says.
"You mean our baby Sammy?" Lucifer asked with a giggle.

"Yes honey. Our baby Sammy. Or our baby boy." Dean smiled, sitting beside Lucifer, as Sam woke up. "Hey baby boy. Daddy didnt mean to yell at you, Daddy was just mad because he had a rough day." Dean says.
Sam pouts and hugged Dean, smiling and nudging his head under Deans chin. "Daddy..." Sam says, with a whine.
"Just go back to sleep Sammy baby." Dean says, as Sam does, and Lucifer watched at the sight.