RWBY One-Shots (18+)

Harry Potter - J. K. Rowling RWBY Percy Jackson and the Olympians - Rick Riordan Masters of Sex
F/F
F/M
Gen
M/M
Multi
G
RWBY One-Shots (18+)
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When the Water is Warm (Yang x Ruby) [FUTA/FUTA]

This chapter was requested

Ruby sighed happily, leaning back as she felt the warm waters of the hot tub gently caress her skin, letting her head rest against the edge of the hot tub. After a rather busy morning of patrolling for grimm, this was the perfect way to relax.
After 10 or so minutes had passed her peace was interrupted by the sounds of someone else climbing into the hot tub. Opening her eyes she saw Yang, dressed in her simple yellow bikini, sitting across from her.
"Hey, sis!"
Ruby said, smiling as Yang leaned back to relax, allowing her long blonde hair to trail through the water. Even though it wasn't her intention, Ruby couldn't help but stare at her sister's gorgeous rack, barely contained by her bathing suit.
"Busy morning?"
Yang asked, leaning back fully to feel the sunlight against her skin.
"Y-yup."
Ruby said. Still gazing at her sister's beautiful chest, She could feel herself getting more than slightly aroused, her cock beginning to strain against the confines of her bathing suit.
Noticing the odd note in Ruby's voice, Yang sat up, smirking at her sister.
"Got something you want help with, sis?"
Yang inquired with a more than slightly slutty smirk as she waded across the hot tub to sit next to her younger sister. Kneeling down so her face was just above the water level, Yang slowly reached underwater and removed the bottom part of Ruby's bathing suit, allowing the redhead's fully erect 8 inches to spring free.
Ruby blushed and let out a gentle gasp but didn't make any attempt to stop her sister as Yang gently wrapped one hand around her sister's dick and began to stroke.
The feeling of underwater stimulation was something Ruby certainly wasn't used to, yet she decided that she enjoyed the unique feeling of the warm water surrounding her cock as the smooth skin of Yang's palm stroked up and down.
It had been quite a while since Yang herself had performed the act as well, the previous time being with her mother, Raven several years prior.
"Feel good?"
Yang asked, her strokes slowing slightly as she carefully groped one of Ruby's breasts with her free hand.
"M-mhmmm..."
Ruby replied, nodding, tiny bursts of pleasure flitting through her body from the new sensation.
"I bet it does."
Yang said, grazing the sensitive head of Ruby's cock gently with her thumb before standing up.
"But this, is gonna feel even better!"
Yang removed both pieces of her bikini, revealing her flawless body before maneuvering herself into position over Ruby's waist and slowly sinking down, biting her lip as she felt her sister's hard member slip inside her asshole.
"Mmmph~ I forgot how thick you are, sis..."
Yang murmered as she slowly began to ride the redhead's cock, hands on Ruby's shoulders.
"And I forgot how tight your ass was~"
Ruby muttered, placing her hands on yangs hips as the blonde rode, the warm water around them only helping to increase the sensation.
The redhead grunted as Yang took 4 inches of dick into her tightest hole, squeezing her shaft tighter than usual as the blonde sped up a little more, despite the restrictions created by the water.
"So good, sis..."
Ruby moaned, looking up into Yang's violet eyes,
"W-Weiss would never... ah~"
Yang grinned with satisfaction, riding just a little bit harder on her sister's cock.
"I... know..."
She muttered through gritted teeth, taking 6 inches of hard cock into her ass.
"That's why... you've got me... oh fuck~"
Leaning forward the big-titted blonde removed her sister's bathing suit top before beginning to rub the redhead's perky breasts, caressing each nipple gently.
"Don't stop, Yang!"
Ruby moaned, gripping her sisters shoulders tightly as she herself began to thrust upwards as much as the water around her would allow, sinking inch after inch of her cock into Yang's ass until she was practically balls deep.
In response the blonde increased her riding speed, sensing her sister's impending orgasm.
"Yaaaaaang..."
Ruby moaned, panting slightly as she thrust upwards,
"Yang! I'm gonna cum! I'm gonna c-mmmph~!"
Ruby's statement was cut short as. Yang pulled her sister into a deep kiss, both sisters moaning as Ruby's climax hit.
Closing her eyes to enjoy the moment, Ruby pumped load after load of warm cum into Yang's tightest hole, until the rush pf pleasure was finally over and Yang slowly broke the kiss and stood up, allowing Ruby's cum to spill out into the water.
"I do what Weiss won't~"
Yang whispered in her sister's ear as she gave her sister's left breast an affectionate squeeze.
"Now c'mon, turn around and lean against that edge. It's my turn to have some fun in the sun~"
Always eager to oblige, Ruby turned around and leaned against the edge of the hot tub, keeping her perfect ass just above water level as she presented to Yang, smirking as she heard a low, lusty groan escape the blonde's lips.
Yang began to slowly stroke her already semi-aroused member, allowing it to slap against her sister's ass gently as it stiffened to it's full 11.6 inch length.
"Just... pick a hole..."
Ruby muttered longingly as she felt the tip of Yang's massive member graze first her soaking folds, then her tight asshole.
"As you wish..."
Both girls let out slow moans as Ruby felt her pussy stretch to accommodate her sister's size as Yang pushed into the redhead's folds.
"Fuck... you feel tighter than norma, sis..."
Yang muttered as she gave her first thrust, sinking a quick 6 inches into Ruby.
"Ahhhh~ Y-You've grown..."
Ruby muttered, her hands gripping the side of the hot tub as Yang set her movement pace, the blonde's impressive member sliding deeper and deeper inside on each thrust.
"Hmmmgh~"
Yang grunted gently as she reached froward with one hand to grip Ruby's shoulder for balance. The combined warmth of the water surrounding her and the sun shining on her perfect body only added to the sensation of pleasure coursing through her. Using her free hand, Yang reached under Ruby to gently cup her sister's breast, giving it a gentle squeeze and getting a pleasured moan in response.
"You like that, sis?"
Yang cooed, pinching Ruby's nipple lightly as she thrust in still deeper.
"F-fuuuckkk yes..."
The redhead groaned, her eyes half closed with pleasure as she felt her own cock hardening once again.
"Deeper, Yang."
She mumbled, panting slightly as she let out gasp after gasp of intense pleasure.
"As... you... wish!"
Yang replied, each word punctuated by an intense grunt as she slammed her powerful shaft deeper and deeper into Ruby's velvety depths, her body ablaze with pleasure.
The third powerful thrust was more than enough to send Ruby over the edge. The redheaded huntress cried out as she came for the second time that afternoon, load after load of cum shooting from her cock into the surrounding water.
Smirking at her sister's reaction, Yang changed her pace, gripping Ruby's ass with both hands as she began to push herself to the limit with every thrust taking her balls-deep.
Even through the fog of pleasure that filled her mind, Ruby could tell Yang was getting close to a climax of her own, the busty blonde's powerful cock throbbing as her pace became brutal and sporadic.
"Almost... there..."
Yang managed through gritted teeth, a storm building inside her.
"Do it, sis... cum inside me...."
Ruby groaned, her body trembling with pleasure.
That was all the invitation Yang needed. With an Ursa-like roar of pleasure, Yang hit her climax. She gripped Ruby's ass tight as she pumped wave after wave of cum deep into her sister's depths, filling her up completely.
After the torrent of seamen finally subsided, Yang slowly pulled her cock from Ruby's tight cunt and sat down in the water, panting heavily.
"You needed that, huh?'"
Ruby said with a smirk as she joined her sister back in the water.
"Damn right."
Yang replied, the two sharing a loving kiss.

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