Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/4372394.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Dean_Winchester/Sam_Winchester
  Character:
      Sam_Winchester, Dean_Winchester
  Additional Tags:
      Panties, Voyeurism, Bathroom_Sex, Top_Dean, Bottom_Sam
  Stats:
      Published: 2015-07-19 Words: 1644
****** A Huge Mystery ******
by brotherhugs
Summary
     Dean/Sam fucking in a bathroom and that's all you need to know.
Notes
See the end of the work for notes
It wasn’t supposed to happen. You usually don’t fuck your 17 year old little
brother till his writhing, almost every night. Dean doesn’t even know when it
started. When his gangly little brother suddenly looks a whole lot better than
the women in his porn mags. He doesn't know why, the holy grail of porn mags
looks like fucking cooking magazines now. Or why he can only get off while
thinking about Sammy. Thinking about how tight and warm he feels wrapped around
his cock. Or how he whimpers and makes little gasps of “Ah, Dean,” when he eats
his ass out sloppily. It's all one huge fucking mystery to Dean.
He also doesn't know how he ended up in a cafe bathroom with Sam on his knees.
The build-up to this point is kind of a blurry mess to him. All that matters is
that he has him kneeling on the grimy floor with his shaking hands struggling
to unbutton Dean’s jeans.
“Slow down baby, its okay.” Dean murmurs down to Sam, whose cheeks are ruddy
and his eyes have a glint of desperation. His lips are already bright pink and
plump, Dean can only imagine what they will look like when his cock is sliding
between them.
Sam's hands tremble but he's more calm as he removes Dean's pants. His hair
flops in his face and Dean reaches down gently to stroke it away with
tenderness that would be surprising to anyone else to Sam. He pushes into
Dean's palm, greedy for contact.
Once Dean's pants and boxers are out of the way, Sam leans forward and licks
the tip of Dean's cock. He's already worked up and breathing hard from one
touch. Sam looks up at Dean with hooded eyes and licks from the base of his
cock up to the tip, then taking it into his mouth with a little grunt of
pleasure. Sam widens his mouth to accommodate Deans girth. He struggles to get
Dean deeper, it's still hard to suck him, even after all the late night
blowjobs. His eyes water and his throat burns but, if this isn't the hottest
thing ever.
"F-fuck Sammy. You're such a good boy for me taking my cock down your throat
like that," Dean says with a deep tone. Dean doesn't know who gets off harder
to his dirty talk. Little mutters of " Good boy," and "you're doing so well for
me, sweetheart," make the two brothers come harder than ever.
Sam keen's high in his throat and Dean feels the vibrations run up his cock and
make his brain turn to mush. Dean grabs onto Sam's silky hair and gives it a
good tug, he knows how much he loves that. He even came once just from Dean's
cock in his mouth and his hands in his hair.
Sam is now sliding up and down his cock with his fist jerking the part he can't
take. He rocks his hips into Sam's mouth. Dean's core tenses and his cock
twitches "Baby, I'm gonna ugn-fuck-" His sentence is cut off when Sam takes his
hand away and forces his head down lower, " If you want me to fuck you, you
need to stop."
Sam pulls off so quick, Dean's sure he has whiplash. His breathing is heavy
when he says softly "Please,"
"What do you want, baby boy? My fingers? Or do you want me to slide those
little panties I know you have on, to the side and slip my thick cock in that
tight ass?" Dean whispers down to him.
The panties thing was fairly new. He had found a pair of lacy, red panties
stuffed in the corner of Sam's bag a couple weeks ago. Of course as soon as he
found them he had Sam ride him with them on and the little string in the back
pushed over so he could have access to his little pink hole. At first, Sam was
a blushing mess when he mentioned them but now he wore them almost everyday.
"I-fuck- I want your cock," Sam whimpered and reaches down to unbutton his
pants. Dean leans down and grabs the small tube of lube, that they bring with
them everywhere.
Once Sam's jeans were out of the way, Dean picks Sam up by his firm ass, shoves
him into the wall roughly with a firm squeeze to the globes of his ass. His
panties are rough on his fingertips. Sam's legs are wrapped around Dean's
waist, his back is pushed against the gritty wall. He has to reach back
awkwardly to get to Sam's hole with his slick fingers and his muscles are gonna
regret this but, Christ if it isn't worth it.
As Dean's fingertip slide in, Sam twists into the contact, back arching away
from the wall, bare chest pressed against Dean. Dean kisses and sucks down
Sam's throat, passing over older love bites and creating new ones, setting his
claim. He adds another finger slowly and Sam curses.
"F-fuck. Dean, more." he crooks his two fingers and points upwards to the spot
that makes Sam scream. The upward thrust of his thick fingers send a rush of
pleasure down Sam's spine. His abs clench as Dean spreads his fingers apart to
prepare him for the wide girth of his cock. Dean's knuckles rub against his
lace panties stretched to the side and his cock twitches. Sam's hips are
pushing into Dean's hand, begging for more. Dean slips in a third finger
slowly, sliding in easily considering all the lube and maybes the fact that he
fucked Sam with his fingers until he came untouched.
Dean's fingers push in and out, curving up to hit his sweet spot almost every
time "Is three enough for you to take my cock, baby boy?"
"Yeah- uh fuck yea." Sam's body jolts as Deans fingertips slam into his
prostate. He slams his head back onto the wall, his mouth in a wide O. He
wasn't gonna last long with the constant pressure to his spot. Moans and
whimpers are streaming from him, his cock is bright pink and dripping precome
onto the floor.
"Turn around, baby." Sam can feel the vibrations from Dean's voice and shivers.
Dean slips his finger out, lets go of Sam's ass to set him on floor and reaches
behind for more lube as Sam turns around to face the wall. Sam can hear Dean
uncap the lube and can definitely hear Dean grunt sharply as he rubs the slick
substance on his cock. "Fuck" Dean mutters.
Deans presses up against Sam, his right gripping the base of his cock, leaning
up to put his cock head in Sam. Dean can hear Sam's sharp intake of breath when
it slips in. Sam's breathing gets harsher as Dean slowly slides his full length
into him, resting once he's fully sheathed in his tight heat.
"You're so tight for me baby." Dean whispers against his clammy neck. His voice
sounds strained, as if he can't control himself. Sam whimpers when Dean starts
slowly rocking his hips, little swings of his hips while his hands grip Sam's
waist and he grunts into Sam's neck.
Sam can tell he wants to slam his hips into him, but is controlling himself.
Dean's hips slowly speed up, his thrusts deep and hard, balls slapping against
his taint.
Sam's breath is punched out of him, little 'ah-ah-ah's' slipping out of his
plump mouth that still faintly tastes of Dean's sweat and precome. Dean moans
at the feeling of Sam wrapped around him, so tight and hot and the scratch of
lace on his cock. Their bodies start moving faster, Sam rocking back into Dean,
greedy for release. Sam's hole seems like it's sucking Dean in. Dean can tell
that Sam is already close from his deep thrusts by the change in his moans. His
whimpers somehow getting higher and louder, body tensed up and his hand clawing
at the wallpaper. Dean is nearly there too. This had to be the hottest thing.
Fucking his little brother who is in damn panties, in a cafe bathroom, the
chance that anyone could hear Sam slowly being taken apart by him.
“You close baby? Gonna come just from my cock and the fact that anyone could
hear how desperate you are to come apart from me fucking you against the wall
like you're some slut?"
"De-dean!" Sam's abs clench and he swears he everything goes white when his
cock twitches and he spurts in his panties. Everything disappears but Dean as
he clenches tightly around him. His mouth is wide open, low whimpers coming out
each pant.
Dean hisses at how tight get when he comes. The pressure around his cock is
amazing. Its better than any girl or anyone he's ever had a one night stand
with. Its fucking Sammy under him, coming and that makes everything even
better.
"Ah- fuck. I'm gonna come" Dean breathing speeds up and he moans loudly while
shouting "Sammy!" as he shoots into Sam, fingers gripping his waist, bound to
leave finger shaped bruises.
They both pant as Dean collapses and presses Sam further into the wall. Dean's
cock is softening in him so he slowly pulls out, Sam’s thong slapping back to
the correct place, lace stretched over his hole which is leaking Dean’s come.
Sam’s tense body slowly relaxes, his limbs feel heavy and weighed down, the
side of being fucked, hard.
“Jesus Christ, Sammy”
***
As they walk out of the cafe, with Dean’s arm wrapped around Sam’s broadening
shoulders, and Sam limping out, hole sore and come leaking out into his
panties, Dean thinks maybe this whole deal with Sam isn't a big mystery when he
gets to drive off in the Impala with their hands clasped and elated smiles on
both of their faces.
The End.
End Notes
     My first fic and I have a F- in English so I hope you had fun reading
     that.
     - s/o to Heaven for encouraging me :') (her vine is @/wincestual)
     _ thx to all of my 0 fanz!
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