Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/11898132.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski, Derek_Hale/Original_Male_Dog_Character(s)
  Character:
      Derek_Hale, Stiles_Stilinski, roscoe_the_dog
  Additional Tags:
      Incest, Anal_Sex, Extremely_Underage, Shotiles, Shota, Shota_Stiles
      Stilinski, Father/Son_Incest, Bestiality, Rimming, Felching, Watersports,
      Derek_is_Stiles'_father, Anal_Fingering, Butt_Plugs, fucked_by_the_dog,
      Face-Sitting, pissing_inside, Comeplay, Come_Eating, piss_drinking
  Series:
      Part 4 of Dirty_Daddy_Verse
  Stats:
      Published: 2017-08-24 Words: 2739
****** Dirty Daddy - Part 3 ******
by DirtyKnots
Summary
     For LeahR95, who left this comment:
     Derek should buy a little butt plug for stiles so he keep all that
     come and piss inside him until daddy’s ready to eat it out of him ;)
Notes
     Please heed the tags. Don't read something you're not going to enjoy.
See the end of the work for more notes
Derek drives three towns away after the first night that Roscoe fucks Stiles.
There are some things he wants to get for him and his boy, but he knows that
the people in town are aware of his situation. He doesn’t want to arouse
suspicions. It’s why he went on that damn date to begin with (not that he can
really regret it after what it led to). Stiles is at school until 1 or so, and
Derek can afford to leave his work for a bit - the flexibility of working from
home has always suited him.
He finds a cheesy chain sex shop and waves off the offer of help from the bored
cashier. He takes only a minute to orient himself before he sees what he’s
after. The variety of butt plugs is definitely greater than he was expecting,
and he’s happy to see there’s a kit with a graduating set, the smallest one
only about the width and length of his pinky. He smiles to himself as he
snatches it up and heads over to the wall of lube, picking out some better
quality ones than what he’d had at home, getting a variety to try. He briefly
contemplates the flavored ones before deciding he much prefers his little boy’s
natural taste to fake anything.
He’s about ready to head to the counter with his purchases when he spots what
looks like specialized bedding in another corner. He heads that way and finds
several options of silk and satin sheets, but those aren’t what drew him.
Instead there’s a case filled with heavy black rubber sheets. He shifts through
the packaging until he finds the right sized set and grabs it up, finally going
to checkout. The cashier doesn’t even bat an eye, which he appreciates, just
totals it up and bags it while Derek pulls out the right amount of cash from
what he’d grabbed out of the ATM prior to driving here. When he gets back to
the car he checks the clock, happy to see he’s got enough time to go home and
set up a little before he picks Stiles up from school.
Derek gets home fairly quickly and lets Roscoe out into the yard to do his
business before taking his purchases upstairs. He fills the bathroom sink with
warm water, adding a little soap before dumping all of the plugs in it to let
them soak, then it’s back into the bedroom to strip the filthy bedding off. He
can feel his cock twitching in his pants as he gathers up the piss and cum
stained sheets, can’t stop himself from bringing the wettest spot up to his
nose, inhaling the smells, tongue darting out to taste it again before giving
in and sucking on the fabric as he wanders out of the room to drop them in the
washer. He can feel himself leaking in his pants, the front staining dark, and
he shucks them off so he doesn’t ruin them before driving to the school. Hard
to explain why you jizzed yourself at the thought of seeing your son. He
shivers a little and sucks harder at the sheet when his cock is free, reaches a
hand down to stroke himself a couple of times, spreading his pre around his
shaft before drawing his hand back and taking one more hard suck of the
bedding. He manages to give it up to the washing machine and heads back to his
room, heavy balls slapping against his thighs.
He retrieves the rubber sheet from its packaging and starts to spread it over
the mattress, hand lingering over a slightly damp spot that he knows lined up
with the wettest bit of the sheets he’d removed. He gets the bottom corners
tucked and is working on the top edge furthest from him, half bent over the
mattress, when he feels cold wet nudging at his ass, followed by a snuffle and
a rough tongue. Derek groans, realizing Roscoe must have finished up and come
looking for him. He shifts one knee up into the bed and grabs a fistful of his
ass, spreading his cheeks and settling down better, is rewarded with more
insistent licking at his hairy pucker. He can feel his hips shifting slightly
against the rubber beneath him, his cock dripping enough pre to ease the way as
Roscoe fucks his long puppy tongue in and out of Derek’s asshole. It’s good but
not enough, and he checks the clock, sees there’s just enough time for a little
fun before his boy needs to be picked up. He straightens and moves to the
bathroom, rinsing the plugs and grabbing one he thinks will work just right
before heading back into the room and picking up one of the new bottles of
lube. He works quickly, opening himself up in the middle of the bed, Roscoe
alternating between trying to lick between his fingers and tasting the pre
dripping down his cock. He has to stop a couple of times to clamp a hand around
his cock, staving off his orgasm. He doesn’t want to come until he’s got his
little boy back in this bed. When he’s opened enough he shifts onto his belly,
drawing his knees beneath him. He lets Roscoe lick at his asshole a few more
times before reaching back and gently drawing the pup up until he can feel that
doggy cock brushing against his cheeks. He angles his hand until he can get a
good hold of it, works to steer the pup until that cock is lined up with his
hole. Roscoe slides home on the first try, hips jackrabbiting him in and out as
he tries to wrap his paws around Derek’s belly.
It’s been so long since he’s had a cock bigger than his son’s little boy one in
him. Roscoe isn’t large, but it still feels good, and he’s sturdy enough that
Derek can squeeze his hole a little, feel the dog filling him. He rocks into
the thrusts, one hand holding back his orgasm, the other fumbling on the bed
for the plug and lube. He releases himself enough to get the bottle ipeb and
coat the plug, has to clamp down again when he can feel the knot start to form,
popping in and out of his hole a few times before it’s too far and locks Roscoe
inside him. He can feel the knot pulsing just inside his rim as Roscoe fills
him up. He remembers from the night before that it won’t be long before it
deflates, Roscoe too young to keep the knot up. When he feels the pressure
lessening he does his best to angle himself up more, clenching tight as Roscoe
draws out of him, wandering off the bed to lick his doggy cock clean. Derek has
a brief thought to follow and do it for him, but he’s got more important things
to do. He reaches back with the plug, gently pushing at his hole with it a few
times until he can pop it in, tapping it to make sure it’s tight. He gets up
and finally finishes the last corner of the rubber sheet before getting
dressed, wincing at the tight confines of his jeans against his hard cock. He
jogs downstairs and out the door, enjoying the way the plug shifts with each
step. Sitting is even better, or worse maybe, the plug pushing into his
prostate.
Stiles is one of the first kids out of the doors when school lets out, flying
down the steps and practically leaping into his daddy’s arms. Derek laughs and
ruffles his hair as he sets the boy down, nodding to the teacher who’s still
wrangling the other kids. He gets him strapped in and heads home.
“Got a couple of surprises for you, buddy, when we get home.” He smiles and
glances into his rearview mirror where he can see Stiles excitedly bouncing in
his car seat.
“Surprises for me daddy?” He nods and Stiles bounces even more, hands clapping.
He lets Stiles ramble about his day, enjoying how much his son loves school
(even if it does mean hours away from home and Derek) until they’re in the
garage. He gets the boy unbuckled before hefting him out of the car and
carrying him inside, Stiles hand sliding down the collar of Derek’s shirt until
he can reach his nipples, idly playing with them like he’s prone to do when
distracted. Derek is setting Stiles’ backpack down when small hands grip his
cheeks, his son trying to turn his head to get his attention. “Daddy we’re home
now, hello kiss!” It’s demanding and it makes Derek grin before obliging, mouth
opening at the first touch of his little boy’s tongue pressing against his
lips. He can feel Stiles’ little cocklet rubbing against his ribs and he
adjusts his grip on the boy, fingers sliding over his little ass until they’re
cupping his little balls, thumb pushing against his hole through his snug
shorts. Stiles kisses harder, squirming more tightly before Derek ends the kiss
and pecks the boy on the forehead as he gently sets him on the floor. His boy
harrumphs before his eyes go big and round and he practically yells out,
“surprise time!”
“Don’t you want a snack first buddy?” There’s a teasing edge to his voice,
because Derek knows his son well.
“Noooooo, surprises first!” Derek laughs and takes Stiles by the hand, leading
him to the master bedroom. He explains the new sheets as he strips down, happy
when Stiles follows suit. Tells his boy how they’ll still put real sheets on
the bed too, but that this way they don’t ruin the mattress and that sometimes
they can play in their wet messes now if they want. Stiles is all smiles and
eager nods as he hurries over and flops onto the mattress, giggling at how
sticky the spot he landed in is already. Derek turns and reaches for the bag,
grabbing the other lubes he bought so he can store them in the nightstand. He
hears a gasp as he’s bent over, turns to see Stiles staring at him wide eyed.
“What is it buddy?”
“Daddy, what’s that?”
“Hmmm? What’s what?” He turns to look and doesn’t see anything, is turning back
when he feels a small hand on his cheek and then pressure at the base of the
plug that he’d almost forgotten about. “Oh, that’s a plug. It keeps daddy full
of whatever is in his ass.”
“Like what?”
“Remember last night when daddy helped Roscoe fill you up?” Stiles nods and
Derek smiles at him again. “Well today daddy felt like he needed to be filled
up too, so I had Roscoe do the same thing to me, but I wanted to keep it inside
for when you got home. I know how much you liked when I cleaned out your little
hole after Roscoe filled you, and I thought you might want to do that for
daddy, maybe after you fill me up too. How does that sound buddy?”
Stiles seems to think a minute before nodding, his little cocklet already
stiffening. “Sounds good daddy!” He starts to stand but Derek shakes his head.
“I need to make sure you’re all the way ready buddy, plus I missed you today.”
He lowers himself into the mattress before pulling Stiles up until his knees
bracketed Derek’s head, cocklet resting on his face, tiny hole over Derek’s
mouth. Stiles knew what Derek wanted and shifted down before he had to do
anything, grinding his ass onto his daddy’s tongue. Derek lapped and slurped at
Stiles’ tight little hole, wiggling his tongue in and out until he could feel
Stiles’ watery pre dripping down his face. He helped his little boy shift off
of him and turned himself over. He waited until Stiles was up behind him,
pressed tight to his body, and then started wiggling the plug out of his hole,
twitching a little when he felt his son licking at his rim as he eased the plug
out. He felt the boy’s tongue dip into him fully as the plug popped free, heard
the boy smacking his lips and quietly muttering ‘yummy’ before lining up and
plunging in. After the plug, there was more give than the last time, so Derek
tried to gently tighten so his boy had something he could feel beyond the
watery doggy cum sloshing around his cocklet. It didn’t take long before Stiles
was spurting his own load in. Even less time before he followed it up with a
steady stream of hot piss, both of them groaning as it filled Derek up to
overflowing. He can feel rivulets of it streaming down his ass, over his balls
before puddling beneath him on the bed. Stiles pulls out when he’s done and
Derek can’t help but clench at the emptiness, can feel it pushing more of the
watery piss and cum out of him.
He feels hot breath over his hole before Stiles drops down to his knees and
sets to work cleaning him up. His tongue is soft in contrast to how Roscoe’s
felt earlier, but far more thorough. He does his best to hold himself open for
his little boy, squeezing and pushing out more of the mix whenever Stiles draws
back. He can hear the joy moaning as he eats the mixture from Derek’s hole,
lapping and sucking at his rim, trying to slurp it out whenever it seems like
there’s none left. Derek’s own cock is leaking copiously onto the bed beneath
him by the time he thinks Stiles should be done, and he draws himself away.
Stiles tried to hold him in place but he just shushes the boy, pulls him over
for a kiss, licking the taste of piss and cum from his son’s mouth. He reminds
him there’s another surprise. He leaves Stiles on the bed and retrieves the
smallest plug from the bathroom. Stiles’ eyes light up when he sees it and
Derek explains that it’s just like daddy’s only made for his little boy sized
hole. He eagerly agrees when Derek asks if they can try it. He flips Stiles
onto his hands and knees, dives back down to lap at that sweet little pucker a
few more times before he lubes up his finger and starts gently opening the boy
on it, barely sliding the tip in and out until there’s no resistance. He licks
around the finger as he goes, loves feeling his boy clench on his tongue. When
he’s sure the plug will fit without pain he eases himself forward, pushes the
tip of his cock past his little boy’s loose rim and starts stroking himself,
shoots when Stiles tries to clench around him. He doesn’t have to remind Stiles
to hold it in when he draws back, is reaching for the plug when Stiles shakes
his head.
“It’s okay buddy, we don’t have to.” He’s prepared to let it go for now,
doesn’t want to do anything his little boy doesn’t want but Stiles speaks
first.
“Want it, but you didn’t finish. Don’t you have to pee too daddy?” Derek isn’t
sure why he’s caught off guard by that, knows Stiles asked for it the night
before too. He nods and eases forward again, pushing against Stiles’ hole with
his now mostly soft cock, massaging his belly until he can feel the pressure
come to a head and his piss starts streaming out into his boy, only a little
dripping down his tiny boy sac and onto the bed, mingling with the bits that
dripped out of Derek. He stays pressed against his son until his bladder is
empty, then he shifts back as he brings the plug up, gently but steadily
pressing it into the boy until only the base is out. He strokes down Stiles’
back, checking that he’s okay. Stiles nods, giggles as he shifts around, tells
Derek that it feels funny but not bad funny. He smiles at that and grabs Stiles
up, carting him into the kitchen for a snack before homework, enjoying watching
the boy squirm into a comfortable position with the plug in him.
He can’t wait to get it out later, eat his own come and piss back out of his
little boy.
End Notes
     Please feel free to prompt me if you'd like to see something added to
     this verse! You can comment anonymously on any of the parts or you
     can find me on Tumblr - where my askbox is always open!
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