Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/14130492.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/F
  Fandom:
      RWBY
  Relationship:
      Ruby_Rose/Yang_Xiao_Long
  Character:
      Yang_Xiao_Long, Ruby_Rose, Zwei_(RWBY), Weiss_Schnee, Blake_Belladonna
  Additional Tags:
      Pet_Play, Master/Pet, Incest, Cunnilingus, Butt_Plugs, Animal_Ears,
      Animal_Tail, Collars, Leashes, Nipple_Clamps, Belly_Rubs, Bondage,
      Groping, Competition, dog_food
  Series:
      Part 11 of RWBY_Requests
  Stats:
      Published: 2018-03-28 Words: 4216
****** Yang's pet sister ******
by Adam_Irons
Summary
     When they're seen in public, she is simply Ruby, Yang's little
     sister. When they're alone, she becomes Rosie, Yang's playful pet
     puppy.
Notes
     This was suggested by Xenomorph123 based on this image
     https://imgur.com/r/RWBYNSFW/EWiqPM4
     I took some liberties with it, but hopefully you'll recognise the
     scene when it comes up. Credit and thanks to the artist as well, who
     I don't now, but did an excellent job and inspired this work.
     I may write more chapters to this, but I'm currently undecided, and
     quite busy.
     As ever, if you enjoyed this and would like to read more, or even see
     your own suggestion written, feel free to comment what you'd like,
     and I'll see if I can get round to it was soon as I can.
Yang exhaled in relief, as she watched her father leave the house, finally
giving her the first chance in weeks to have some alone time with her puppy.
The blonde hated to be a neglectful owner, but with the constant presence of
her father, it had been impossible for her to play with her pet lately.
Heading upstairs to her room, Yang quickly stripped naked, before getting
dressed in something more appropriate to play with her pet in. She settled on a
pair of thigh high leggings under her yellow knee high yellow high heeled
boots, as well as similarly coloured latex gloves that went almost up to her
elbows, and a fitted black corset that left her huge D cup breasts exposed. Her
outfit left little to the imagination, leaving her pussy, ass and tits all
exposed for anybody to see, although only her pet would.
After checking herself in the mirror, satisfied with how she looked. Yang left
her room, crossing the hall to the bedroom where she knew her beloved pet was
patiently awaiting her, just as she had been instructed to. Yang couldn’t help
but smile to herself as she looked forward to the week alone she would have
with her. She had prepared her pet earlier, so that she wouldn’t have to waste
a single minute of their playtime once their father left, and instructed her to
wait until her owner returned.
Opening the door, Yang was pleased to see that her most beloved pet had not
moved from the position that she had been instructed to remain in. She was
facing away from the door, looking out of the window, although she was kneeling
down, meaning that even though she could just about see outside, nobody passing
by would see her if they looked in. Yang couldn’t help but grin, not only at
her own handiwork in preparing her pet, but also in the girl’s obedience in not
disobeying her master, kneeling facing away from her master although most knew
her by the name of Yang’s sister; Ruby Rose.
It was true, that Yang’s pet – when she was not obligated to obey her master –
adopted the persona of Yang’s sister, Ruby. At least, that was what they told
each other, ever since Yang had implied that Ruby’s true identity was as her
pet, and Ruby was merely a facade, as opposed to it being believed that it was
the other way around.
What had started off almost three years ago as little more than Ruby fooling
around and trying on Zwei’s collar for fun had ended up as this. After Ruby had
commented to Yang how comfortable and natural the collar felt around her neck,
Yang had joked that she would make a good puppy, to which Ruby had responded by
mimicking some of Zwei’s mannerisms, receiving a belly rub from her sister in
return. It wasn’t long after that that both sisters eventually confessed to how
much they loved the thought of Ruby being Yang’s pet, and so they did it again,
with Ruby behaving as a dog, and Yang treating her like one. The pair’s
fascination with ‘puppy’ Ruby quickly turned sexual, with Yang teaching the dog
girl to pleasure her, orally or otherwise, and rewarding her puppy with sexual
favours.
Three years of this led to the situation that the girl’s were in now. Ruby was
kneeling in her bedroom with dog ears atop her head, as well as a tail that was
attached to a buttplug that Yang had lubricated and inserted into her asshole
earlier. Ruby also wore red boots that went up to her thighs that had clips at
the very top of her thighs and behind her calves, with a short silver chain
connecting them, so that it would be impossible for Ruby to straighten her
legs, forcing her to remain kneeling. What’s more, the puppy wore metal rings
around her wrists and at the very top of her bicep, which were clipped
together, forcing her arms to be bent. While she still maintained control of
her fingers, and her hands were free, it meant that they were rendered pretty
much useless.
As well as these, Ruby wore a corset, similar to Yang’s that exposed her much
smaller but still round breasts, although unlike Yang, Ruby had a nipple clamp
on each nipple, connected by a short silver chain. Finally, to finish off the
whole aesthetic, Ruby had been made to wear a cute little red authentic dog
collar with a golden bell on the front.
“Hey Rosie!” Yang called out to Ruby, using her pet name taken from Ruby’s
surname, prompting ‘Rosie’ to turn around and look up at her master.
Rosie bounded happily over to her sister, forced to crawl on her knees and
elbows which, while being difficult at first, she had gotten quite adept at,
even able to crawl like this on the stairs too without falling. She didn’t slow
down as she approached her sister, slamming into the blond and tackling her to
the ground, straddling her as she knocked her out onto the hall floor. Yang
chuckled, looking up at her pet to see her wide silver eyes staring back, as
the pup panted, happy to see her.
“Did you miss me?” Yang asked. Rosie didn’t respond, simply leaning down and
licking Yang’s face, soaking her in saliva. Yang groaned in disgust, but
couldn’t hold back a chuckle, as she gently pushed the puppy off of her so that
she could stand back up.
“I’ll take that as a ‘yes’, shall I?” Yang asked.
“ARF! ARF!” Rosie barked, nodding eagerly and getting up on her hind legs so
that she was propping herself up against her owner’s leg. Yang smiled down
sweetly at Rosie, scratching the part of her head behind her fake ear, making
her wiggle her butt, effectively wagging her tail as best she could, since she
(unfortunately) didn’t have a real tail or ears. Yang looked down at her pup,
lovingly.
“I’m sorry we haven’t had a chance to play in a while.” She apologised. “But
you’ll be glad to hear that we’ve got the whole week to ourselves!” Rosie
barked a couple more times in glee, as Yang scratched behind her ears again.
Without saying another word, Yang took a leash out of her pocket, clipping it
onto Rosie’s collar and heading downstairs, with her obedient pup quickly
following behind. There really was no need for a leash indoors, but Rosie loved
the playful tugs that her master gave her, and Yang liked to know where her
puppy was at all times, so that she didn’t get into trouble. Although ‘Ruby’
never got into trouble at home, ‘Rosie’ was a whole other story, usually
obeying orders and doing as Yang said, but occasionally being naughty so that
her master would be encouraged to punish her, which they both knew she loved.
As Yang led Rosie to the kitchen though, it seemed that she had decided to be a
good girl today, following the blonde obediently. Due to her awkward bindings,
Rosie was forced to crawl on her knees and forearms, which meant that her face
and chest were quite low to the ground, but her round supple ass was stuck up
in the air, just how Yang liked it.
As her master leaned back against the kitchen counter, Rosie’s eyes widened
when Yang picked up a plate of her favourite chocolate chip cookies that had
previously been invisible to her, due to them being all the way up on the
counter. Yang picked one up, and looking down into her pets eyes, took a bite,
savouring its wonderful taste, forcing her hungry pet to watch as she devoured
the entire cookie.
“Oh, did you want one?” Yang asked.
“ARF! ARF!” Rosie barked again, using their code. Two barks meant yes, one bark
meant no. Yang smirked at her pets response.
“Hm, do you deserve it though?” She wondered aloud. “I suppose if you’re
good... sit!” Yang commanded. Instantly, Rosie sat back on her legs, her arms
raised up to shoulder level, and her tongue lolling out of her mouth as she
panted, sounded just like a dog. As she sat on her calves, Rosie
unintentionally forced her butt plug tail a little deeper into her ass,
although she didn’t mind. Far from it.
“Good.” Yang congratulated her. “Speak!”
“ARF! ARF! ARF!” Rosie barked again, panting and hoping that she had done
enough to earn a treat.
The puppy was in luck. Apparently Yang was feeling generous, or just didn’t
want to be cruel to her pet after they’d been apart for so long. Well,
technically as long as Yang had Ruby, she would have Rosie, but the two were
like two entirely separate persona’s. Despite their matching excitable
personalities and playful attitudes, Rosie was much more obedient than Ruby,
but could also be much naughtier than her too, if she was looking to be
punished.
Yang broke a bit off of one of the cookies, tossing it up in the air and
watching it fall down, clapping her hands in applause when Rosie caught it in
her mouth, chewing on it before swallowing, looking up to her master for more.
“Well done girl!” Yang exclaimed. “Now, roll over!”
Rosie complied immediately, rolling onto her back with her legs and arms bent
in the air, she looked up at her master, as she exposed herself to her, giving
the blonde girl a view of her pets corset clad belly, but more intriguingly,
her cute supple breasts with their nipple clamps and her increasingly wet
pussy. It was no secret that Ruby got off whenever she became Rosie, and
admittedly so did Yang, although the dominating blonde seldom showed it.
Yang grinned, as she rubbed Rosie’s belly with both of her hands through her
corset, making the pup wriggle on the floor in glee, before moving her hands up
her body, taking a breast in each hand a giving them a gentle squeeze. Rosie
whined in pleasure, rubbing her thighs together as her owner molested her and
toyed with her. Yang chuckled at her pets reaction, taking a hold of the chain
that connected the girl’s nipple clamps and giving it a light tug, tightening
the pressure that was on either side of her nipples, earning a cute whimper
from the aroused puppy.
“Who’s a good girl?” Yang asked, her tone of voice that of one who was speaking
to a dog.
“A-Arf..!” Rosie barked, whimpering as her master tugged on her chain a few
more times, before letting go, and ordering her to roll back onto all fours.
Rosie complied, crawling onto all fours, as Yang noticed a small puddle on the
kitchen floor where her pet had gotten a little too excited and leaked on the
floor. There was only a little bit there, but Yang could still see that the
puppy’s pussy was dripping with the same juices.
“Rosie!” Yang complained. “Look at what a mess you’ve made! Clean that up right
now!” Rosie whimpered, saddened at being chastised, but did as she was told,
turning around and leaning down and lapping up the mess that had come from the
warm place between her legs. Her face was already close to the ground, so she
didn’t have to lean too far down, but she did just enough so that her soaking
wet pussy was revealed to her owner, who bit her lip at the mere sight of it.
The puppy was still working her tongue on the floor, obediently doing as her
master instructed in the hopes of getting a reward for good behaviour, when she
suddenly felt something hard push between her wet folds. Rosie whined in
confusion and pleasure, looking over her shoulder just enough to see that her
owner was resting her foot on her ass, while she pressed her high heel into her
pets pussy from behind, only an inch or two, but still enough to arouse the
young pup.
Once the floor was adequately cleaned, Rosie turned back to her master, mouth
open and eyes wide in joy, only for her to then force her high heel into the
pup’s mouth, forcing her to use her tongue inside her mouth to clean it,
tasting her own sweet juices before she placed her foot back on the floor. A
growl from Rosie’s stomach mad her blush in embarrassment, as Yang got an idea.
“You hungry girl?” Yang asked.
“ARF! ARF!” Rosie replied, indicating that she was. Yang smiled in response, as
she headed over to the cupboard where Zwei’s dog food was kept, taking out a
tin. Rosie watched as her owner opened it, pouring it into her bowl, before
placing the bowl on the floor and watching her pet dig into it.
Yang still couldn’t fathom how anybody could eat that stuff. She had tried it
herself after she had first given it to Rosie, and almost vomited. Even Ruby
admitted that it was gross and got ill from eating it, but Rosie – despite
having a human digestive system – didn’t seem to mind at all, nor did it affect
her, further backing up Yang’s theory that Rosie was much more than just an act
that her sister put on.
However, upon having heard a can of dog food open, it was only a matter of
seconds before Zwei came bounding into the kitchen stopping in his tracks as he
looked up at Rosie, who stopped eating and looked back at him. Zwei was an
intelligent dog, and had learned to distinguish between Ruby, his owner, and
Rosie, his arch nemesis, despite their nigh identical appearance. The two dog’s
locked eyes for a few seconds, before Zwei growled. Rosie did the same, as the
corgi made to eat her food.
“ARF! ARF! GRRR!” Rosie growled, baring her teeth at the real dog.
“GRRR! RUF! RUF!” Zwei growled back, as the two looked as though they might
have it out then and there.
“Zwei! Rosie! Down!” Yang commanded them, grabbing the pair by their collars
and forcing them apart. Zwei had never gotten along with Rosie, jealous of how
much attention Yang gave her when she was here, as well as the fact that if
Rosie was here, it meant that Ruby wasn’t. Similarly, Rosie had always been
jealous of Zwei, for being an actual dog and not having to remain cohabiting a
human body with the owner of the corgi.
Yang opened another can of dog food, pouring it into Zwei’s bowl and placing it
down. The two dogs ignored each other, as they both began to eat, shooting each
other glances every so often, as their mutual blonde owner shook her head in
disapproval at both of their behaviour.
Zwei was the first to finish eating, looking up at Yang and panting, indicating
that he was thirsty. Yang filled up both of her dogs water bowls with water,
placing them beside their food bowl, as Zwei immediately began to take big
gulps of water, while Rosie finished eating.
By the time Rosie was done with her food, she went to take a drink of water,
only to notice that Zwei had purposefully knocked hrs over. The pup growled at
the other dog, as she dipped her tongue into his bowl, trying to get some of
his water, only for the corgi to bare his teeth at her and growl threateningly,
forcing her to back off. Rosie whimpered, her big silver eyes looking up at her
owner, who looked back sympathetically.
“Is Zwei being mean?” Yang asked. Rosie nodded, as she crawled over to her
master. Yang ran her hand through her pets hair lovingly. “Don’t worry, my pet.
You get a special kind of refreshment as a treat.” Yang informed her pet, using
her middle and index fingers to carefully part her own wet lips, revealing her
glistening cunt to the young pup.
Rosie’s ears perked up upon hearing this, and her eyes wide as she saw what her
master was referring to. She boldly opened her mouth and tried to nuzzle her
mouth and nose against the sweet spot, only for her owner to use her leash to
hold her back.
“Don’t be rube, Rosie.” Yang told her. “What do you do when you want
something?” Rosie knew what to do, sitting down on her legs and kneeling down
before her master, whimpering and whining, letting slip the odd measly bark as
she was made to beg for her treat. Yang didn’t take too long giving in, giving
her leash a light tug.
Instantly, Rosie knelt up, her chains that connected her thighs to her calves
only allowing her to kneel so high, but that was just high enough for her to
reach her owner’s most desirable area. From her position, her hands went to the
most natural place, which was her master’s thighs, as she propped herself up on
the woman to reach her lips up to meet Yang’s own pussy lips.
The taste that she was addicted to, that she craved, that she dreamt about;
finally, after weeks of it being unavailable to her, it hit her taste buds with
such potency that Rosie thought she might actually orgasm herself right then.
Her owner seemed satisfied so far, as Rosie kiss and licked in and around her
master’s soft pink folds.
“You’re so sweet, Rosie, but enough teasing already!” Yang told her, breaking a
smile, as her pet obeyed, forcing her own face further between the blonde’s
thighs and reaching her tongue as far as it would go into the girl’s hole. The
blonde hummed in mild pleasure, as Rosie’s wet tongue worked quickly inside of
her. Unlike when she would reward the pup, her strokes were not slow to build
up before the climax, but abrupt and frequent, as if the dog was thirsty and
trying to drink.
Yang didn’t mind though. No matter how quickly or slowly she did it, Rosie
always got her off eventually, and it was always bliss to feel such pleasure
while she watched her pet clean up after herself. The lilac eyed owner ran her
hand through Rosie’s short crimson locks, as she looked down, her eyes meeting
Rosie’s gaze, the pups silver iris’s looking up innocently at her master.
“Fuck, Rosie, you’r such a good girl!” Yang commented, causing Rosie to wiggle
her butt, wagging her tail again. This also inspired her confidence that she
was doing a good job, as she began to make the strokes of her tongue more
pronounced, thrusting it in and out of the woman harder and faster, if that was
possible at the rate she was going.
Throughout this, Zwei watched on, envious of his rival. Though Yang had never
been crazy enough to actually let Zwei do anything to her that was remotely
close to Rosie, he could clearly see his rival enjoying herself, before he
walked away. Yang may have seen both Zwei and Rosie as just pets, dogs, but
there was clearly a difference between a dog persona in a human girl’s body and
an actual dog.
“You’re such a slutty bitch, aren’t you?” Yang asked, grinning down at how
eager Rosie was to pleasure her master’s pussy with her mouth. Rosie whimpered,
looking up at her owner as if hurt by the statement, causing Yang to quickly
make amends. “I love you for it though!” Rosie regained her esteem, as she went
on eating out her owner’s pussy.
Nothing felt as good to Rosie as it did to serve her master. Not eating
cookie’s, not being rewarded with belly rubs, not her own orgasms. Not even
leaving her owner’s mess around her mouth and over her chest as she fell
asleep, embarrassing Ruby when she awoke the next morning in Rosie’s body. With
her master’s enjoyment and pleasure in mind, Rosie slowed down, despite craving
the delectable nectar that she would be rewarded with if she continued on.
Instead, the pup wrapped her lips around the small nub just about Yang’s cunt,
striking it gently with her tongue and eliciting an audible gasp from her
master, before doing the same again.
“AH! Rosie!” Yang gasped again, as her clitoris was repeatedly licked by her
pet. The pup wagged her tail again in excitement, feeling the woman’s thighs
start to tense up and her muscles contract as she circled her clit with her
tongue.
Finally, Rosie was given her reward when she lashed her tongue across Yang’s
clit, causing her owner to lose control and release her vaginal fluids all
across her pets mouth. Rosie tried to drink up as much of the sticky mess as
she could, managing to hydrate herself with a fair amount of her owner’s
nectar, while also decorating the area all around her lips and mouth, as well
as her bare chest with the fluid too.
“Rosie... that was incredible!” Yang told her pet, who was kneeling down,
panting and beaming up at her owner in delight, while her own pussy leaked
juices onto the floor. Usually if she did a good job at pleasuring Yang, she
would be rewarded with an orgasm herself.
“I think...” Yang began, teasing her pet. “...that you deserve a reward for
that.”
“ARF! ARF!” Rosie barked in agreement, wagging her tail yet again. While having
the honour of eating out her master was itself enough of a reward and a treat,
it was still deemed by Yang as grounds for further rewarding if she did a
particularly good job such as now, and Rosie wasn’t going to argue with her
master, especially if it meant she was allowed to orgasm.
Like the slutty puppy she was, Rosie turned away from Yang, leaning forward and
looking behind her to reveal her sopping wet cunt for her master to finger,
fist, or fuck with a strap on; she didn’t care, they were all signs of her
loyalty to her owner, and they all got her off. Yang simply chuckled, shaking
her head.
“You don’t want me to give you an orgasm, do you?” Yang asked, earning a
disappointed look from Rosie, before she continued. “No, I think this warrants
a special treat...” The blonde teased, leaving Rosie confused as she got out
her scroll, selecting a contact before calling them.
The scroll rang a few times, before eventually the contact picked up.
“Hello?” Weiss’s voice came from the other end. “I’m a little busy now Yang, I
can’t really talk.” The heiress informed her.
“Hey Weiss, I was just wondering if Rosie and I could come round later.” Yang
asked, as Rosie panted and wagged her tail happily upon hearing that they might
be visiting Weiss.
“Rosie’s there?” Weiss asked. “I’d love to see you both, but like I said,
there’s a bit of a situation – Blake, get down from there! I‘m warning you!”
Weiss yelled, interrupting herself from her conversation with Yang to chastise
her pet cat. Yang heard a loud hiss on the other end, before a loud smash.
“What’s going on there?” Yang wondered aloud.
“Blake’s acting up. She just broke ANOTHER plate! Honestly, I don’t know what’s
gotten into her lately...” Weiss told Yang.
Just as Rosie was Yang’s pet dog, Blake was Weiss’s pet cat. However, since
Weiss had enough money to buy a house for herself and Blake, it meant that they
had much more freedom than Yang did with Rosie, and thus, Blake was almost
always in her cat persona. Unlike Rosie though, Blake was merely a human acting
like a cat, although the fact that she was a cat Faunus helped this. When Weiss
and Blake had first observed Rosie’s behaviour, they had both commented that it
was not normal, further cementing Yang’s belief that Rosie was not just an act
put on by her sister, but rather a separate personality entirely, a dog that
had somehow become trapped inside a human’s mind and body, as she often put it.
“Oh, well, if you like, I could bring Rosie around anyway. You know what
they’re like. Maybe Blake will be good if she sees Rosie?” Yang suggested.
Weiss sighed.
“I suppose so...” Weiss sighed, as another plate was heard smashing. “...please
hurry...”
Yang arranged to set off to Weiss’s place now. She got dressed into something a
little more appropriate for going outside, wearing her baggy grey trousers, a
yellow tank top and her grey jacket, along with black and yellow combat boots.
Rosie, however, was not privileged to wear anything more modest, as Yang helped
her into the backseat of her car – she couldn’t exactly take bumblebee with
Rosie – along with Zwei, since she didn’t want to leave him at home all alone.
“Now, you two promise to be good on the way to Weiss’s, okay?” Rosie scowled at
Zwei, but nodded, as the corgi licked Yang’s had in response.
Yang shut the door, before getting in the front. Luckily she had the windows
tinted enough that nobody would be able to see Rosie in the backseat, and she
would still be able to see out. The blonde set off on her way to Weiss’s, with
both her pet dogs excited to be able to play with Blake again.
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