Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/595955.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Regulus_Black/Sirius_Black
  Character:
      Regulus_Black, Sirius_Black
  Additional Tags:
      Puppy_Play, Butt_Plugs, Sibling_Incest
  Series:
      Part 2 of High_Stakes_Word_War_-_prizes
  Stats:
      Published: 2012-12-17 Words: 1029
****** Sirius with his pup ******
by imera
Summary
     While Sirius is the one who can turn himself into a dog, Regulus
     loves to act like the dog
Notes
     I had plans of adding about their parents not being in the house for
     some reason, so they wouldn't hear the boys, but decided not to write
     anything about it.
     Written to Yeaka as her prize for beating me in a word war
     Unbetaed
Maybe it was always meant to be, Sirius dominating his younger brother. They
weren't aware of it when they were younger, but Sirius could see it now;
Regulus was, and would always be, the submissive.
"Sit," Sirius commanded while he sat down in his own chair. Regulus, wearing
tight black shorts, paw gloves and a collar, obediently sat down next to
Sirius. "I've got a present for you," Sirius said. Regulus stared at Sirius
with a smile, low noises escaping his throat, expressing his eagerness.
Sirius opened the box and showed Regulus the new toy. Regulus recognized the
object at once and made a happy sound. "I thought you'd like it," Sirius said
and picked up the fake dog tail butt plug from the box. Regulus jumped around
the room, happy about his new gift. "Come here," Sirius ordered as he found the
bottle with lube.
Regulus was obedient and crawled over to Sirius, licking Sirius' hand. "Aren't
you a happy pup," Sirius said with a smile and opened the bottle. "Don't move,"
he said and walked behind Regulus. With his wand, he opened the magical zipper
in the shorts that was created for easy access. "Bend down," Sirius said and
watched Regulus' arse as it opened up in front of him. Placing the bottle with
lube right above the entrance, he squeezed the bottle and watched it run down
the pup's arse. Sirius reached for the lube before it reaching Regulus' balls,
slowly he pushing the lube up Regulus' crack, and pushed his finger into
Regulus' arse. He entered his bother once before reaching for the new toy.
Slowly he pushed the tale in, enjoying the moans Regulus made.
When it was fully inserted, Sirius took a step back to look at the new toy.
"Wag your new tail," Sirius requested. Regulus obeyed and shook his arse,
causing the tail to move. A jolt of excitement went through Sirius' body as he
watched the nice view in front of him.
"Walk," Sirius said and sat down on his bed. Regulus obeyed and slowly crawled
around the room, his new tail wagging every time his arse moved. Sirius reached
for his growing bulge, trying to release some of the building pressure. "Good
pup," he said. Regulus shook his arse, showing off his new tail.
"Do you want your toy ball?" Sirius asked. Regulus jumped in circles while
staring at Sirius with big happy eyes. His mouth open and his tongue hanging
out as he continued to shake his arse.
Sirius reached for the red and gold ball in his nightstand. He remembered the
first time Regulus saw the ball, he was not happy about the colours, but forgot
all about the colours as soon as Sirius threw it.
They played with the ball for ten minutes before Regulus was done and went to
drink from his bowl of water. He returned to Sirius when he was satisfied and
sat down next to him, placing his gloved hand on Sirius' thigh, staring at
Sirius, making whining noises.
"What?" Sirius asked. Regulus moved slightly closer and poked Sirius' thigh
with his nose. "Are you hungry?" Sirius asked, receiving no answer from
Regulus, who continued to whimper. "Do you want another toy?" Sirius asked and
pulled out a squeaky toy. Regulus did not seem to be interested in the toy and
continued to push his nose against Sirius' thigh.
"What is it?" Sirius asked in a stricter voice. "You know I don't like a whiny
pup." Regulus crawled between Sirius legs and pushed his nose against Sirius'
crotch, sniffing. Sirius stroked Regulus' hair softly, trying to figure out
what his pup wanted. Regulus lifted his head and licked Sirius' hand before he
moved down between Sirius' legs and licked the hard bulge.
"Do you want my cock, pup?" Sirius asked. A deep growl escaped Regulus' throat,
it was a noise Sirius loved to hear. Standing up, Sirius unbuckled his trousers
and pushed them down. Grabbing his erected cock, he squeezed it a few times as
he watched Regulus with the new tail. Sitting down, Sirius opened his legs and
watched Regulus as he moved closer and licked his cock and balls.
"Good puppy," Sirius said in a raspy voice. Regulus was talented with his
tongue, and knew exactly what Sirius liked. "Such a good puppy," Sirius
repeated.
Regulus stopped licking for a second in order to bark happily and shake his
arse. Sirius loved hearing Regulus make dog sounds; he loved it so much that
his cock twitched every single time. Regulus returned to the cock soon and
continued licking before Sirius got impatient.
"Good boy," Sirius moaned, struggling to hold himself. Regulus let his tongue
cross the head of the cock, pressing it against the slit and sending shivers
down Sirius' body. He made sure to take each of the balls into his mouth and
suck them as well, before returning to the cock, licking it every way possible.
Sirius groaned deeply right before he came, spraying his cum across his chest.
Regulus continued to lick the cock until it lay against Sirius' stomach, empty.
Regulus jumped up on his knees and crawled closer to Sirius, licking Sirius'
cum.
When Regulus was happy with his job, he jumped back and waiting patiently for
Sirius to sit up. Because it took longer time than he liked, he whined. "Stop
doing that or I'll punish you," Sirius said in a stern voice. He sat up and
stared at Regulus, who was now quiet. "Good puppy," he said and stood up to
pull his trousers back up.
"Do you want me to rub your belly?" Sirius asked with a playful tone. Regulus
barked happily and wagered his new tail. Sirius couldn't help giggle by pup's
excitement. Sitting down next to Regulus, Sirius rubbed Regulus' head before he
moved down to the belly and softly stroked fir a long time before he decided it
was time for bed.
After brushing his and Regulus' teeth, Sirius lay down in his bed. "You can
come up if you want," he told his pup. Regulus jumped up on the bed and lay
down by Sirius' feet, his place.
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