
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8374912.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Castiel/Dean_Winchester
  Character:
      Castiel, Dean_Winchester
  Additional Tags:
      Dubious_Consent, Gaslighting, Deepthroating, Daddy_Kink, Age_Play,
      Underage_Sex, Rough_Sex, Rough_Oral_Sex, Bottom_Castiel, Top_Dean, Guilty
      Castiel
  Stats:
      Published: 2016-10-25 Words: 2999
****** You Are My Greatest Sin ******
by babyboyplaid
Summary
     Cas met Dean on an online chat room late one night. Now, he can't
     imagine life without him.
Notes
     Please, please pay attention to the tags. They list out a few of the
     triggers in this fic. For clairty, this fic involves an underage (17)
     Castiel with an adult Dean. There is inherent dubious consent in this
     dynamic, not to mention how messed up consent is in the relationship
     anyways. There is implied abuse and there are some very rough moments
     in the fic. Please do not feel bad if you need to turn away from this
     fic.
     Other information: Dean is still a hunter but Cas is a human boy
     living in Oklahoma with a preacher for a father.
See the end of the work for more notes
     Cas’ phone vibrated in the pocket of his jeans, like a reminder of his
guilt. He just kept his head bowed as his father continued to drone on with
Grace, blessing the food they were about to consume. It wasn’t that Cas didn’t
believe in God, it was just that he had different views that his devout father.
It didn’t help that his father was also a preacher and took everything
literally. With his phone vibrating in his pocket, he was reminded that what he
was doing was quite possibly against everything his father wanted from his
seventeen year old son. However, Cas couldn’t quite be bothered to care about
that. Not when Dean was involved.
     Once Grace was said and Cas had managed to chew through a good chunk of
his food, he excused himself and went off to his bedroom-- the exact place
where Cas had met Dean. Well, not exactly. It was where Cas’ computer was and
that was how he had met Dean. Late one night, Cas was hanging out in some
chatroom for gay guys and soon enough, stumbled into Dean.
     Dean was exactly the enigma he needed in his life; he needed the man to
get him through the dark and confusing angst of his teen years. Even though
Dean was nearly twice Cas’ age, he figured that just meant that Dean had more
experience and could help him get through his feelings. It was an added bonus
that he had a really nice cock. When he got turned on, Cas could ignore the
feelings in his gut; could ignore the guilt that was stirring deep in his soul.
It was when the moment was over that he knew he would be left with the crash of
his feelings; knew he would have to worry about his father finding out somehow
that he was sleeping with a man, and an older one than that.
     As he made his way over to lay out on his bed, Cas pulled his phone out
and smiled at the phone. Dean was drunk and he could tell that much. The words
weren’t exactly spelled right but that just meant that Cas was going to have an
even better time with Dean. They worked out the plans for their get together
and Cas was practically giggling as he rolled out his plan.
     Dean was going to come and pick him up.
     As the night went on, Cas listened for the sound of his parents going to
bed. Once he heard them close up into their room for the night, he hopped out
of his bed and pranced over to his dresser. He was sure to quickly change into
the baby blue briefs he kept stashed in the back of his underwear drawer. They
were the ones that Dean had bought him and they were the man’s favorite. Which
meant they were Cas’ favorite. He wiggled his perky little bottom into them and
then pulled on his jeans and a tank top that would show off his midriff if he
put his arms up into the air. It made him feel all kinds of ways to imagine
Dean’s eyes on him; to imagine that he was wanted by Dean. That was an
incredible moment for the teenage boy. And of course, his cock hardened with
glee at what it meant when Dean wanted him.
     Soon enough, the time came and Cas opened his bedroom window and slipped
out onto the ground below. He practically ran the length of the lawn out to the
road and half a second later, that ever so familiar dark Impala drove up and
Cas’ heart nearly jumped clean out of his chest. Dean was in there.
     He pranced around to the other side of the car and slid into the passenger
seat. With that, they were off again. No time for people to be seeing this and
such. Cas had a wide grin that stretched the span of his face and he raised
himself up to place a small kiss on Dean’s cheek.
     “Missed you, old man.” He smirked with his lips still against the rough
stubble of Dean’s face.
     “Missed you too, little brat.” There was a smile on Dean’s face. He could
feel it.
     The words didn’t exactly come out perfectly pronounced and Cas could smell
the whiskey rolling off Dean. But he didn’t mind. If anything, he wish he could
have a glass with Dean right there in the car. Cas would do anything for the
man, would do anything to see that approving look in his eyes.
     The tires rolled them up onto the interstate and Cas settled back into his
seat, putting his feet up on the dash board. He got the distinct impression
that Dean wouldn’t be one to normally allow that considering the man’s
relationship with the car. But when you were cute as fuck and let the man bury
his cock in your throat on the regular, you got special privileges.
     They chatted idly about how things were going. It was mainly Dean nodding
as Cas went on and on about how much he couldn’t stand his life. How no one at
school got him, how his parents drove him crazy. Dean would pipe in
occasionally with some story from his life. In all honesty, he loved the tales
of where Dean went in his life. He had some kind of job with the government
that he wasn’t allowed to talk about, obviously. But it took him all over the
place and Cas loved to hear the stories that he was allowed to hear about
Dean’s travels. What he wouldn’t give to be on those travels with him.
     Eventually, they pulled up to a motel and that was another thing. Dean
didn’t have a home. He just hotel hopped and when he was coming into Cas’ area,
he would hit the boy up. It wasn’t that they stayed out of touch when Dean was
on the road, it was just that they didn’t talk every minute of every day. They
would exchange pleasent messages for periods of time and occasionally have a
call here and there. Those mainly consisted of Cas whining and begging Dean to
swing through Oklahoma. And he did, from time to time.
They hopped out of the car and Cas took a look around. The parking lot was old
and cracking and the sign seemed like it was hanging on its last hinge. But he
was with Dean and that was all that mattered. Walking up to the room, it wasn’t
as bad as Cas would’ve expected from the exterior. It was cozy enough. God, it
smelled like Dean and it was all Cas could do not to bury himself in the sheets
to soak up the smell; imprint it into his brain and carry it with him like a
security blanket.  But of course he couldn’t. Plus, Dean had other ideas and in
the moment, Cas liked those ideas better.
As the door closed behind them, Dean’s fingers found their way into Cas’ hair
and pushed Cas face first up against the wall. Dean was right there behind him
though and Cas was just wiggling his bottom back into Dean’s crotch just to
feel the swelling there. And god did it fill some deep seated need in Cas.
“Gonna be a good boy for Daddy?” Dean growled, grinding up into Cas’ ass.
“Gonna be the best.” Cas said, his breath nothing more than a breathy moan.
That was perhaps the best known summary of their relationship: Daddy and boy.
Dean was there to provide the structure and support, Cas was there to provide
the entertainment and company and it all just worked out wonderfully.
Sometimes, Cas went deeper into their dynamic than he was sure he should. Dean
never said anything though; there was never a complaint from the older man when
Cas did things like perch atop the end of a bed to watch cartoons or scribble
silly little drawings into the backs of Dean’s notebooks.
Dean’s hands were there exploring the inches of Cas’ skin, tracing familiar
patterns and finding new ones to trace into Cas’ flesh. They stayed like that
for a long moment, just grinding against the wall before Dean was ushering Cas
further into the hotel. When they got next to the bed, Dean’s lips connected
roughly with Cas’ and his little tank top was all but torn from his body a few
minutes later. With that, Dean brought his lips down to Cas’ nipples and held
the boy still as he began to torturous process of sucking on them.
It was stimulation overload for Cas but Dean was just there, holding him still
against the squirming as he sent overwhelming jolts of electricity through Cas’
body. He wanted to move away from the sensation but he’d promised his Daddy he
would be good. Cas wasn’t as fond of Dean when Cas had managed to misbehave
somehow. That was a side of his Daddy that he didn’t exactly like to draw out.
And so that just leaves Cas standing there on the spot, squirming into his
Daddy’s arms as the man has his way with him. It’s not that he doesn’t like it,
it’s just too much for him to handle sometimes. It’s over soon enough and Cas
knows he will be onto better things any moment. Dean manages to wiggle Cas out
of his jeans and smirks approvingly when he sees Cas’ underwear choice. Dean
just gives his rear a firm smack and Cas bites his lip, pressing a kiss to
Dean’s cheek.
“Wore them just for you, Daddy.”
“Such a good boy for me.” Dean practically purrs back.
And when those words roll off of Dean’s tongue, they land like little ecstasy
bombs all over Cas’ flesh and they travel deep into his gut to set into flight
the butterflies he craves. Dean thinks he is a good boy and that is all that
matters to Cas. All he needs to hear in life are those words. And when he looks
up at Dean, his eyes are so full of admiration that he has to wonder why Dean
coughs low and looks away. A second later though, Dean’s lips are rough on his
neck and any thoughts in Cas’ head just go away. The man fills every inch of
his brain.
Slowly, Cas feels Dean urge him down onto his knees and he knows his prize is
just about to come. Cas is instantly mouthing at the denim fabric that encases
the man’s cock and Dean just lets out a slow growl. He keeps a firm grasp on
Cas’ hair as he pulls his zipper down and lets it flop out. He doesn’t even
unbutton his jeans and fuck if that isn’t turning Cas on even more. With that,
Cas takes the head into his mouth and just lets it spread his jaws apart. He
lets the musky saltiness fill up the space of his mouth and his whole world
becomes about Dean’s cock.
Eventually, he has worked his way up to moving his head up and down the shaft
and Dean is just letting a slew of moans fall from his lips. It isn’t until
Dean’s grip tightens in his hair that he knows he's in for the real treat. Dean
forcefully pushes Cas all the way to the base of his cock and holds him there,
constricting the boy’s airway. His world begins to blur as he gags on the
obtrusive member in his throat but he doesn’t move away; he lets his Daddy hold
him there until the man has decided it is time for Cas to move. When he is
finally allowed off of Dean’s cock, he is coughing and spluttering and his hair
has fallen to splay across his face. A sharp slap to the face brings him back
into the moment and he suddenly remembers his protocol.
“Th-thank you, D-Daddy.” He says in a shaky breath and god, that makes him
slick the front of his briefs up even more.
And then the cock is back in his mouth, gagging him once more. Cas is loving
the way Dean roughly thrusts into his throat, using the boy’s dark hair as a
gripping place to make sure he doesn’t get away. Not that Cas would move away
anyways, but he is definitely loving the way it feels. His Daddy is in control
of the moment and he would not have it any other way.
Before he has a chance to process what is happening, he is being hoisted off
the floor and thrown onto the bed. As he suspected, the sheets do smell of Dean
and he buries his nose in them, drinking it up while he can. Dean yanks the
briefs off of Cas’ legs and squats to spread the boy open. Cas lets out a shaky
moan when he feels his Daddy’s hot breath on his sensitive hole and he knows
what is coming. A second later, he feels the man’s tongue lapping at his
entrance and his stubble is roughly rubbing into the sensitive flesh of his
bottom. Cas bites the sheets in an attempt to muffle a cry but it is useless
when Dean presses his tongue inside the boy. Cas’s head falls to the side and
he lets out a lewd moan. There isn’t a favorite part of their ritual for Cas
but this definitely ranks as one of the better moments.
Dean takes his time to work Cas over and he has sunk into an abyss of ecstasy
and moans. There is nothing but pleasure in the moment and that is all he
needs. Dean knows how to treat Cas the right way and there aren’t words to
express his gratitude for that. Dean is buried deep in Cas’ ass and Cas could
not imagine a better feeling in the world. Soon, Dean takes a harsh bite on
Cas’ bottom and he lets out a little squeak. When he hears Dean chuckle, he
knows his Daddy is taking sadistic delight from this. There is a sharp slap to
Cas’ bottom that follows shortly and he whimpers as he rolls onto the bed.
Dean reaches down and grabs Cas’ by the head, dragging him up to look up at
Dean. He places a finger below Cas’ chin and just keeps that devilish smirk on
his face.
“Who do you belong to, boy?”
“You.” Cas says softly.
“Who’s the only person that really cares about you?”
“You.” Cas reiterates for Dean.
A slap to his face sends Cas tumbling back onto the bed. “Don’t you forget it
either.”
Cas knows this is just what Dean likes during sex. He likes to play rough and
Cas is more than ok with that. He watches with hazy eyes as Dean undresses and
then he is there on top of Cas, pinning him to the mattress. His breath is hot
on his cheek and he can smell the whiskey again. He almost can get a buzz off
the smell alone. Or maybe it’s just Dean.
Before he knows it, he is being turned over and his face is pressed into the
pillow as Dean lines up his cock and lets it sink into Cas’ body. The only lube
on it is Dean spitting a few times and it sends a fiery pain up into Cas’ body
but he gets the impression that Dean just gets off on that as well. It isn’t
long until Dean is letting out little grunts as he moves his cock in and out of
Cas, fucking him without remorse. Dean couldn’t seem to care that Cas was in
pain, just that he was getting pleasure out of the boy’s body.
And somehow, that turns Cas on even more.
Cas just bites down onto the pillow and he blushed fiercely as the voices of
the boys from his school ring in his head. Pillow biter was an insult but in
the moment, it was so true. Dean pounded away at Cas though and he just let his
mouth move from the pillow, letting his cries of pain and pleasure fill the
room. This elicited more pounding from Dean and before he knew it, he was
coming against the sheets, making a mess between himself and the mattress.
He could feel his hole clench around Dean’s cock and that earned a few deep
growls from the man. He wasn’t finished though and the onslaught to Cas’ now
sensitive hole continued. Cas just fell limply to the bed as his Daddy finished
up from his end. He heard a few telling moans and then felt Dean’s hot come
shooting out deep into him.
Cas had done his job. He had made his Daddy happy.
They laid in the quiet aftermath of the sex and Cas just blinked at the wall a
few times. If his father knew that his son was getting fucked in some seedy
hotel, he was sure the man would blow a gasket and die. Perhaps he should let
his father in on the little secret. Soon enough, they got dressed and had to
make the dreaded drive back to his place. Out on the road, Cas turned to Dean
and gave him a sad little frown.
“You be good, kiddo.” He tapped Cas’ chin with his finger.
“I’m the best.” He smirked.
With that, he was off across the lawn again. It wasn’t until he had climbed
through his window and looked back that he saw Dean still sitting there. He
wished he didn’t have to leave the man but now was not the time. He would be
eighteen in a few months and maybe he could get Dean to let him run away with
him then. Until then, all he could do was give a little wave and watch the red
tail lights of that Impala fade off into the distance.
End Notes
     Comments are love, my friends.
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!
