Chapter Text
The first time Dean and Castiel have sex, it's on the violent side of passion. They bite and claw at each other, as if trying to merge together. The hunt could have been Dean's last, if not for Castiel's intervention. As Castiel dumped the body of the last creature to the side, he and Dean locked eyes. When Castiel extended his hand to help Dean stand up, they kind of collided without knowing who started it. Castiel instantly zapped them to the motel room, leaving Sam behind. "Fucking finally" he said before heading back to the impala, to get supplies to clean up the mess. In the morning he sent Dean a text saying "Not going back to the bunker for a few days. You guys enjoy the honeymoon".
The next day both are hesitant, both wanting to get close to the other without doing too much. But that night, back in Dean's room in the bunker, they hold each other tight, as if their lives depend on not letting the other go. Dean falls asleep with his head tucked under Castiel's chin, and the angel stays awake, wanting to remember every second of this happiness he is finally granted. The love bites on his chest are already disappearing, and he is scared memories will be all he's left with.
As the week pass, they slowly become sweeter. Touching each other for no reason apart from touching, Dean lightly kissing Castiel when he says something cute, watching TV together. And when Sam is about to come back and Dean become nervous again, Castiel grabs the hunter's hand and tells him "If you go back to being distant from me just because your brother is back I swear I will kick him out."
Sam is not kicked out. However he often goes on hours-long walks.
The new, gentler side of their relationship is most visible in the privacy of their bedroom, when Dean slowly thrusts inside Castiel, Castiel carding his fingers in his lover's hair as they pant and moan, whispering the occasional "love you" as if it is a secret they are cautious to tell. They both fall asleep, Castiel spooning Dean, and neither can imagine anything better.
They still go hunting as a trio. But once in a while, when the creature seems obvious and easy, Dean and Cas will go by themselves. And once they go back to the motel, still full of adrenaline, they fuck like that first time. Except now they know it's not the last time.