Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8395618.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Dean_Winchester/Sam_Winchester
  Character:
      Dean_Winchester, Sam_Winchester
  Additional Tags:
      Sibling_Incest, Consensual_Underage_Sex, Oral_Fixation, Belly_Bulging,
      Feminization, Dirty_Talk, Rough_Sex
  Series:
      Part 14 of Tumblr_Writing
  Stats:
      Published: 2016-03-26 Words: 1379
****** Petulant ******
by formalizing
Summary
     Sam can be a boiling-blood petulant boy when he’s given orders that
     don’t start with ‘baby’.
Notes
     Originally posted on_Tumblr.
     In response to a gif sent to me by @samsbangs in the hopes that it
     might “inspire some wonderfully beautiful oral fixation samdean
     ficlet.”
Sam’s a noisy boy; his mouth is always busy. It’s soft in a classroom and sharp
in an argument. Sam can be a boiling-blood petulant boy when he’s given orders
that don’t start with ‘baby’—baby, bend over so I can see it, baby, suck a
little harder, here it comes, swallow, baby, swallow.
That mouth never needs to be told to swallow, but Dean likes the look in Sam’s
eyes when he’s being obedient.
Those pillow lips are always parted when he’s on Dean’s dick. Even when he’s
riding more cock than a boy his age is built to take, so much more than he
should be intimately familiar with, he still moans like he’s empty. He is a
needy, two-holed boy, can’t stand the air on his wet tongue; he wants to be
full in every soft, pink place he has.
“Jesus, Sam, shut up,” Dean hisses, covering Sam’s mouth with one firm hand.
Even little sounds are loud through thin motel walls, and Sam’s sounds aren’t
half as little as he is. “You’re gonna get us kicked out.”
Sam narrows his eyes, and Dean can feel that up-to-no-good smile against his
hand before Sam pulls his mouth free.
“Make me,” he dares, clenching around Dean’s cock, slowly squeezing the trigger
of a gun he’s not ready for the kickback on.
It’s not quite a gunshot sound, but the headboard definitely rattles when Dean
flips Sam to his back, digs bruises into skinny, growing-boy thighs as he pulls
them wide and pins them down, rolls on top and in between them.
“Open your mouth,” he growls, and Sam swallows hard, licks his lips like he’s
tempted, but doesn’t do as he’s told.
“Or what?” he pants, wide eyes sparkling. He can be a smart-mouthed little
brother boy when he thinks he’s going to get exactly what he wants, just like
he always does with Dean.
“Or I’ll fucking leave you here,” Dean says, sliding two fingers easy into the
open space his cock left between Sam’s legs, curling them up and pressing until
Sam’s whining, knees digging hard into Dean’s sides as his shaky legs
instinctually try to close. “I’ll leave you right here, Sam, legs spread and
panties on the floor; don’t think I won’t. And y’can try and fill this greedy
hole with just those skinny fingers of yours, but they won’t feel half as good
as this dick, will they, baby?”
Sam shakes his head against the pillow, gasping, “No, not as good, Dean.
Please.”
“Then open. Your. Mouth,” he punctuates each word with a resounding smack of
his hand against Sam’s ass, and Sam’s trembling bottom lip drops open even
before the hand prints start to show in red on his skin.
Dean shoves two fingers deep enough to make him gag, mirrors the action in his
other hole, and Sam has to swallow hard around them to empty his watering
mouth.
“That’s it,” Dean says, softer now that Sam is sweetly French-kiss tonguing the
seam between his fingers in apology. “Now reach down and hold that pussy open
for me. Kinda got my hands full.”
He twists both sets of fingers splitting Sam open to prove the point, and Sam
whimpers as he presses his feet flat to the sheets and lifts his hips. He gets
one hand on each cheek and pulls them apart to give Dean a perfect view of his
own thick fingers buried deep inside, where Sam’s slick and sore and red with
use.
“There it is. Fuck, you’re a mess,” he murmurs, spreading his fingers as far as
he can get them inside the tight grip of Sam’s ass, dragging them out slow to
rub around the wet, abused rim, slapping it once with a sloppy sound before
slipping back inside with three. Sam whines, high-pitched and desperate. “Just
how I like you.”
Sam turns to hide his face in the pillow, like maybe he’s shy and blushing,
maybe he’s never been exposed this way before; sometimes he likes to pretend
he’s not the filthy, fuck-hungry boy Dean’s seen every secret inch of.
Dean fishhooks his fingers in Sam’s cheek and twists him back.
“Don’t hide from me,” he growls as pulls his fingers out to grip his dick,
pressing the head teasingly at where Sam’s hole is already fluttering around
the emptiness he left behind, trying to close back up good and tight. “Wanna
see your face when I pump you full of come. Gettin’ filled’s your favorite
part, ain’t it, Sammy?”
Dean can almost hear the back-talk in the way Sam lets his teeth scrape Dean’s
knuckles, bites down with a flash of white teeth on his fingertips when they’re
all that’s left between his lips. That’s not my name.
“Be nice, baby,” Dean says, smirking as he stuffs his cock back inside without
warning, has to grip with his whole palm over Sam’s mouth to muffle the cry he
makes.
When Sam quiets down, Dean uses his tongue instead, licks up the low, achy
sounds Sam makes when he’s getting dicked as deep as he can handle.
Dean splays the fingers of one hand on Sam’s abdomen, runs his thumb teasingly
against the slit of Sam’s dick, where he’s leaking for attention. Sam bucks his
hips, whole body clenching and stomach tensing on a gasp, and there, against
the skin of his brother’s poverty-hollow belly, Dean can feel the bulging
outline of his cock where it’s tucked deep inside, making a place for itself
where it shouldn’t fit.
He pulls back to get a better look, and Sam sucks in like he’s trying to fit
into an outfit that’s two sizes too small, brings one hand up to slide his
fingers into the gaps between Dean’s own. His whole body shivers when he
presses down and feels the firmness of it.
“You’re so big,” he murmurs, voice sweet and soft, like he’s that first time
virgin-boy again, begging to be touched in ways he doesn’t even understand yet.
Innocent words have never sounded quite the same from that mouth since the
first time it was full of come.
“And you’re takin’ it all so good for me. Y’take dick better than any other
girl I’ve had,” Dean says and bites Sam’s lip, thrusting faster because he was
on-edge even before Sam crawled up in his lap, already warmed up and wet for
him. “Gonna come for me, too? Like the way you squeeze when you’re blowin’ your
load.”
Sam nods, makes a sound that is just short of a sob when Dean gets both their
tangled fingers around Sam’s dick and tucks it down against Sam’s stomach so
that every thrust nudges their cocks together through the skin. He goes almost
painfully tight when he comes, teeth pinking his teeth to make sure he does it
quietly.
Dean groans, “Good boy,” when he buries himself deep and fills him up as
promised, and Sam sighs happily into his ear.
A trickle of come follows the head of his cock as he pulls out and sits back on
his knees, looking down fondly at the drippy mess he made of Sam’s hole while
he catches his breath. It can’t even close up properly it’s so well-stretched
and puffy at the edges.
Sam cants his hips up and slips a hand down between his legs, drags one finger
through the spillage before bringing it up to his lips and sucking it between
his fingers like a kid licking frosting remnants from the mixing bowl.
Dean hisses in a sharp breath as his spent cock throbs between his legs at the
sight.
“Keep that up and y’might get it in both ends yet tonight.”
Sam smiles lazily around his finger, drags it out from between his lips with a
deliberate pop, eyes half-lidded and challenging.
“Promise?”
It’s not likely that he’ll ever fuck the attitude out of Sam entirely; he’s not
sure he even wants to.
Dean runs his thumb over Sam’s damp lower lip as he imagines that mouth
stretched wide, those heavy eyes wet with just a hint of tears as Dean fists
one hand in Sam’s hair and fucks past his gag reflex.
Well, there’s one sure-fire way to keep a noisy boy quiet.
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