Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2068569.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Teen_Wolf_(TV), teen_wolf_-_Fandom
  Relationship:
      Sheriff_Stilinski/Stiles_Stilinski
  Additional Tags:
      belly_bulge, Stomach_Bulge, Size_Kink, Talk_of_fisting_in_the_last
      paragraph
  Stats:
      Published: 2014-08-02 Words: 778
****** Big ******
by Seanbiggerstaffrox
Summary
     Stilincest belly bulge ficlet
Stiles’ dad is big. Really big.
Stiles feels the air sizzle and evaporate around him, stealing oxygen from his
lungs as his father pushes inside. He’s sweaty and shaking, hamstrings
trembling around the sheriff’s hips.
“Are you okay?” The sheriff asks. He’s going slow, so slow, and Stiles is torn
between begging him to move faster and asking him to stop altogether.
Stiles nods, afraid to move too much around the large intrusion. “Keep going.”
Stiles whispers.
The sheriff’s pushing in again, shallow increments working him in millimeter by
millimeter. It feels even bigger than it looks and Stiles holds back a whimper
as his insides stretch, accommodating his dad’s length. His dad’s fingers
twitch around his own, a comforting, grounding weight. He feels the calloused
skin of his father’s palm pressing against his and he glances at it quickly,
taking in the contrast of the aged hand over his own. His father’s knuckles are
hairier and the flesh is lighter and more wrinkled. Stiles squeezes his digits
around his dad’s. His other hand is laying by his side, wringing the sheets in
white knuckles.
Stiles looks up at his dad again, breath hitching. His father’s mouth is open
in pleasure and his eyes are closed as he pushes in. He must be pretty deep by
now. Stiles glances down, watching the front of his pelvis shift slightly as
his dad penetrates him. It’s small, the hint of a bulge, and Stiles bites back
a moan. He should be freaked out watching his father’s cock move inside of him,
but it has his hormones racing and the burn suddenly feels more satisfying than
painful.
“Fuck.” Stiles gasps.
The sheriff stills, looking at his son in concern. He follows Stiles’ gaze and
sees the slight bulge in the teen’s abdomen. “Oh.” He mutters in shock. It’s a
surprise for both of them. The sheriff’s big, but he didn’t think he was that
big. He supposes Stiles is just lean enough to show like this. The sheriff
looks at Stiles’ face, searching his expression for something like disgust or
fear, but all he sees is arousal.
“Keep…keep going.” Stiles pants. The sheriff doesn’t have much left. Just two
centimeters. He pushes in and Stiles moans, watching the cock’s progress inside
him. The sheriff bottoms out and Stiles licks his lips, shifting around his dad
and staring at the way his stomach shifts as a result.
The sheriff pulls back just a little and Stiles whimpers. His dad moves back
in, eliciting another sound from the teen. Stiles’ abs shift on each movement,
fluctuating under his dad’s pushes and pulls, and he watches them with a
twisted fascination. His cock leaks out a drop of precum and he rocks up into
the thrusts.
The sheriff tries to go slow, setting a muted, languid rhythm, but Stiles keeps
coaxing him, trying to get him to go faster. The sheriff groans, pushing in to
the tight, warm heat more vigorously than he intends, and Stiles lets out a
satisfied, longing noise, watching the rough swell of his pelvis. Sheriff
Stilinski has trouble tearing his own eyes away from the motion and he fights
the desire to fuck into his son hard and deep, just to see the undulation of
his son’s stomach.
It’s a losing battle, and not only because his son’s hole is gripping him hot
and tight, sucking him in. His son's begging for it with every twitch of his
body and the sheriff is seduced not just by the feel of his cock moving in the
teen, but the sight of it. Each bulge of his abs has the sheriff thrumming with
a morbid satisfaction and he slams forward, relishing the cry Stiles lets spill
out of his lips and the way his pelvis leaps up, his stomach protruding around
the sheriff’s length.
Stiles chokes out a surprised moan and the sheriff ruts into him, gasping and
watching his son’s body swell over his member. Stiles is shaking, trembling
around his father’s big cock, and he can barely get breath enough to gasp out a
desperate ‘dad.’
When the sheriff comes, Stiles watches the bulge still inside of him. He
imagines he can see it twitching as his dad fills him up in streams, and Stiles
falls over into his own orgasm, coming hands-free on his swollen belly.
He thinks in the aftermath that while his dad’s cock is huge, his fist must be
even bigger. He wonders just how deep he can get it to go and pictures the
movement of his dad’s hand under the surface of his abdomen. His cock twitches.
It’s definitely something to consider.
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