Summary: Sam walks in on Dean and Castiel in bed and can't accept them so he leaves them and goes off alone, leaving Dean heartbroken. In the midst of the Apocalypse, the vessels are apart and both vulnerable to attack. PLEASE REVIEW!

Disclaimer: I don't own Supernatural or its characters.

A/N: Hey! This fic is going to have a non-understanding!Sam and quite frankly Sam is gonna be a bit of a bastard at times. This will contain vulnerable!Dean and caring/loving!Castiel. ENJOY! xxxx

The Danger of Being Apart

-One-

Dean and Castiel had been together secretly for a few months, and were in love. That is strange for Dean Winchester, yes, but there was no denying he loved Castiel and Castiel loved him. As they lay naked in bed, Castiel beneath Dean, they shared a tender kiss before Dean began to thrust, pressing his forehead to Castiel's and looking into his bright blue eyes. Their kisses were deep, passionate and loving, their touches soft and gentle and their movements languid. The room was freezing thanks to the cold January weather and broken heating so the couple were under the bed sheets as they made love.

"Dean," Castiel whispered as Dean's thrusts sent shivers down his spine, "I love you, Dean."

"Love you too," Dean replied, leaning down and connecting his lips with Castiel's again, both of them moaning into the kiss as they moved closer to climax.

Their bodies rocked together, hands gently caressing each other, lips romancing each other. Dean could feel his orgasm pooling in his abdomen and he sped up a little, soon after, both of them tensing as they came. As they slowed to a stop they shared loving kisses and touches, both their heads snapping round as the motel room door opened and the light came on.

Sam stood in the doorway, shock plastered all over his face as he stared at the couple in bed.

"What the fuck?" He began, slamming the door shut.

"Sammy…" Dean warned as he pulled out of Castiel and kept them both covered with the sheets, "Please…"

Sam shook his head and grabbed his unpacked bags. Since the Winchesters had only gotten to that motel that night, they couldn't be bothered to unpack which at this point was a blessing for Sam and a curse for Dean.

"Sam…" Castiel said softly.

"You shut your mouth." Sam growled, pointing a warning finger at Castiel.

"Hey, that's enough." Dean said, "Don't talk to him like that!"

"Fuck you." Sam snarled, checking his wallet for money and then heading towards the door.

"Sammy!" Dean called, his heart racing with panic as Sam headed out of the door, "SAM!"

Dean jumped out of bed and threw his boxers and jeans on, rushing out into the cold air. Castiel threw his boxers and pants on too, moving to the motel room door.

"Dean, come back inside!" Castiel called, Dean ignoring him and running through the snow barefoot.

"Sammy, please!" Dean cried, "Please!"

"Fuck you, Dean!" Sam yelled, "Don't call me, don't talk to me, stay the fuck away!"

That's when Sam looked over to Castiel who stood looking sick with worry by the door.

"AND THAT APPLIES TO YOU!" He screamed, looking Dean with disappointment in his eyes (yeah, fucking disappointment, like Dean and Castiel were wrong).

Sam turned and walked away, Dean calling his name until Sam had disappeared from sight.

The older Winchester shivered with the cold, jumping when he felt Castiel's hands on his shoulders.

"Give him time, Dean." Castiel said softly, his heart breaking at the sight of tears in his human lover's eyes, "Come away…come on."

With tears now falling down his face, Dean let Castiel take him inside, feet hurting from the cold of the snow and body shivering from the ice wind outside. Dean thought Sam would be understanding, would be happy for him. Clearly not, and that broke Dean's heart.

-TBC-

NAUGHTY SAM *Slaps his wrist* POOR DEAN! *Huggles him* Hope you enjoyed this! Reviews are lurved! xxx