Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12281214.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski
  Character:
      Derek_Hale, Stiles_Stilinski, roscoe_the_dog
  Additional Tags:
      Extremely_Underage, Shota, Shota!Stiles, Shotiles, Bestiality, Derek/
      Stiles/Original_Male_Dog, Stiles_Stilinski/Dog_-_Freeform, Watersports,
      piss_drinking, pissing_inside, piss_felching, Fingering, Butt_Plugs, Anal
      Sex, Piss_Play, Comeplay, Incest, Father/Son_Incest, Stiles_is_Derek's
      son, KINKTOBER2017
  Series:
      Part 6 of Dirty_Daddy_Verse, Part 2 of Kinktober_2017
  Collections:
      Kinktober_2017
  Stats:
      Published: 2017-10-06 Words: 1975
****** Dirty Daddy - Part 5 ******
by DirtyKnots
Summary
     Kinktober Day 2
     Dirty talk | Watersports | Forniphilia (Human Furniture)
     Derek wakes to a surprising, but pleasant, encounter.
Notes
     As always, please read the tags.
See the end of the work for more notes
Derek wakes to a dim room, none of the lights had been turned on before he and
Stiles fell asleep and now the sun was setting. He blinked the remnants of his
nap away and glanced around, realizing Stiles was nowhere to be seen. He got up
and stretched before calling out for his son, scratching at his belly as he
wanders into the hall and down the stairs. He can hear a faint scrabbling of
claws and belatedly remembers that Roscoe hasn’t been out since this morning.
He follows the sounds to the kitchen and stops in surprise at the sight that
greets him.
Stiles is on his back, Roscoe poised above him - one leg cocked in the air, and
Stiles has his mouth wrapped around the puppy’s sheath. Derek can see his son’s
throat bobbing frantically, trails of liquid escaping his mouth despite his
efforts. Roscoe slowly lowers his leg after a couple false starts before
wandering away and Derek watches him go before turning back to look at Stiles,
who’s now sitting up, legs splayed out, one hand idly playing with the end of
the plug that’s still poking out of his ass. The boy is licking his lips, eyes
trained on Derek.
“Stiles?”
“Roscoe had to go and you always told me not to go outside alone and I was
thirsty and you were still sleeping and -”
“Hey hey, it’s okay buddy, daddy’s not mad.” Derek could tell Stiles was
gearing up for a ramble so he cut it off quickly, smiling at his son when he
seemed relieved to not be in trouble. “That was good buddy, Roscoe got to pee
and he didn’t get in trouble for doing it on the floor.” He scooped Stiles up
and helped the boy wrap his legs around his waist, one arm holding him tightly,
the fingers of his hand pressing into the boy’s cheeks, one nestled snugly over
the plug so he could tap it as he carted Stiles to the counter. He set him
gently on it, enjoying the way the boy gasped at the cold tile against his
still slightly warm cheeks. He took the opportunity to steal a kiss, his tongue
sweeping through Stiles’ mouth, chasing the lingering taste of the dog’s piss.
He nipped at his son’s lips before stepping to the side and digging through the
fridge, grabbing ingredients and making a couple of sandwiches before pouring
two glasses of juice. They went back upstairs to have their makeshift dinner,
Derek allowing a little TV time since Stiles had been so good about his
punishment earlier. He was pleasantly surprised when Stiles sunk down onto his
pillow and rubbed his face across it, the thing still soaked from earlier. He
smiled when Stiles sucked some of the material into his mouth, chasing the
taste of his own piss before he scooted further down the bed, an arm and leg
wrapped over Derek’s thigh, shifting until he could take the head of Derek’s
soft cock into his mouth and suckle like it was a pacifier.
Derek let one hand wander down to rub through Stiles’ hair, thumb occasionally
brushing the boy’s cheek as they watched the nightly comedy shows. It was nice,
after the stress of the day, to watch his son take his comfort. He was close to
drifting off again when the urge to piss started to grow. He smiled down at his
boy, made sure Stiles was still awake, eyes glued to the screen, and relaxed
his bladder enough to let a tiny squirt out. He had to forcibly stop his hips
from thrusting up when Stiles made a hungry noise and sucked on his cockhead at
the first tangy drops in his mouth.
“Thirsty baby?” Stiles only nodded back, eyes locking on Derek’s face as his
tongue traced the slit in his cock, not wanting to move and miss out on any
more. Derek shifted a little, helping Stiles move until he was nestled between
Derek’s hairy thighs. “Ready?” Another nod had him relaxing a little more, eyes
locked on Stiles’ mouth and throat, watching his son guzzle his warm piss
straight from the tap. He did his best to control it, wanting to watch Stiles
drink it all. Every time he cut the stream off, he was rewarded with renewed
sucking and a bit of whining from his son. He did his best to shush the boy,
until it was too much and he couldn’t stop the flow any longer. He groaned
audibly when the stream started in earnest, fingers rubbing across Stiles’
cheeks and chin as the boy frantically gulped, playing in the mess spilling out
of his mouth. Derek could feel it running off the boy’s face and back down into
his bush, but he didn’t care, loved being covered in it just as much as Stiles
did. He let the boy suck at him a few moments longer than he was pissing for,
loved the feel of that little tongue digging under his foreskin to clean him
out, and then hauled Stiles up into a wet and filthy kiss. He could feel his
boy rutting against him, trying to get some friction on his tiny cocklet, and
Derek was just about to shift them around for a little more fun when there was
a dip on the bed and Roscoe was suddenly there, whining in his face. He could
see the pup moving around in his signature ‘gotta piss’ dance and was briefly
annoyed that he’d have to toss on some pants and take him out in the backyard
before he had a better idea. He asked Stiles first, but he was pretty confident
the boy would say yes, and he wasn’t disappointed.
He shifted everything on the bed around, sliding Stiles’ pillow under the boy’s
hips and pushing down so he knew how to shift right. Once Stiles was done, he
eased Roscoe behind the boy, sat on his knees to be steadier as he helped hold
the pup in the right spot, tucking that sheath up against Stiles’ hole as he
carefully dragged out the tiny plug. He soothed his son when he wriggled in
discomfort at the not-quite lubed enough anymore bit of plastic being dragged
out of him. He set the plug off to the side and then moved his hand back,
fingertips helping to hold the sheath in place as his other hand held up the
dog, pressing on it’s bladder. He could see the hesitation - Roscoe was
housebroken after all - but he whispered nonsense to the pup as well, calling
him a good boy and telling him to go potty, that it was okay. He was rewarded
less than a minute late when he could feel warm trickles of piss soaking his
fingers as the dog let go. Making sure not to jostle the sheath too much, he
shifted one finger up along Stiles’ crack, reveling in the feel of that hot dog
piss shooting into Stiles’ hole over his hand. He could hear Stiles whimpering,
‘yes’ and ‘please’ falling from his mouth easily, and he murmured praise to his
son. It didn’t take long for Roscoe to finish and try to wriggle out of Derek’s
arms. He held the pup a minute longer, praising him again for being such a good
boy and then lifting him up, his own curiosity too strong to deny as he sealed
his mouth around the still wet sheath and sucked, enjoying the burst of piss on
his tongue when he dipped it inside and flicked it against the tip of Roscoe’s
cock.
Derek could see Stiles shifting around, tiny hole clenched tight, and he
reluctantly set Roscoe back down, deciding to leave that for another time
before turning fully to his son’s ass. He knelt behind the boy, running his
lips and nose all around his sopping wet hole before giving in and dragging his
tongue from his boy’s tiny little balls all the way up his crack and over that
tight little pucker. He moaned at the sharp taste and used his fingers to pull
Stiles’ cheeks apart before digging in, his tongue alternating between broad
licks and short stabs inside. It was good but not enough, so he grabbed Stiles
around the waist and lifted the boy as he levered himself backwards. When he
was flat, he helped Stiles settle on his face, hole right over his mouth as he
encouraged the boy to relax and let go. He couldn’t help rubbing his face
around, loving the slight bit of redness it sparked on Stiles’ skin as that
hairless body rubbed against his two day stubble. He let the first bouts of
piss drip into the beard, over his tongue, before diving in deep, telling
Stiles to push it back out. He licks and slurps at the tiny hole until there’s
nothing left, then quickly shifts Stiles around, has the boy thrust his tiny
cocklet into Derek’s mouth until it’s spurting out the watery boy come. He
suckles the cocklet a bit longer, can tell Stiles is nearly ready to piss
himself, and presses on his son’s belly to encourage his bladder. He’s rewarded
a few seconds later with a warm flood in his mouth. He swallows some, then
opens wide, letting his mouth fill and the piss run over, soaking his pillow.
When Stiles finishes, Derek still has a mouthful to go, and he carefully sits
up with his mouth closed before leaning over, letting small trickles go as he
soaks Stiles’ pillow again, swallowing a little before urging Stiles back up
into a kiss, groaning happily when Stiles clambers into his lap and sucks some
of the piss out of his mouth.
They spend long minutes passing the rest back and forth as Stiles grinds his
little ass down on Derek’s hard cock. Derek lets his hands wander up and down
the boy’s back, fingers occasionally dipping between his cheeks to play with
his still wet hole. He’s just shifted his hands back up when he feels a much
smaller pressure on his cock, Stiles’ hand stroking up and down him before the
boy angles his daddy’s cock up and sinks his hole down on it. He can’t get very
far - the plug has slowly been stretching him but Derek is a fully grown man,
his cock is much too big, but it doesn’t stop Stiles from squeezing his ass
over the head of Derek’s cock, doing his best to slide the tip in and out of
his hole, mimicking fucking as best as he can. Derek draws his face back, hands
cupping Stiles’ cheeks before kissing the tip of his nose.
“Such a good boy for daddy. I love you so much baby.”
“Love you too daddy.” Stiles’ smile is blinding and Derek can’t help but draw
him into another kiss, this one slower despite the increasing pace of Stiles
bouncing the his ass on the tip of Derek’s cock. Derek reaches down and starts
stroking the rest in time with it, his hips pumping a little involuntarily from
how good it feels. It isn’t long before he’s clenching up, cock pulsing in his
hands as he unloads inside his son. The angle makes it hard for Stiles to keep
most of it in, and Derek can feel it dripping back down his shaft, but he
reaches over and grabs the tiny plug anyhow, dragging it through the come still
coating his cock before carefully settling it back in Stiles. He enjoys the way
Stiles wriggles as he adjust to the sensation before turing a sleepy expression
on Derek.
“Tired daddy.”
“Okay baby, let’s go to bed.” Derek shifts them around until Stiles is
comfortable, and then curls around him, both of them happy to lay their heads
on their soaked pillows.
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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