Cinder's Duty (RWBY)

A/N: Cinder's Duty was a commissioned one shot from back in December of 2019. Posting it up now for people to enjoy!

Themes: Futanari, Rough Sex, Oral Sex

-x-X-x-

To those who knew her, or at least thought they did, Cinder Fall was many things. Dangerous was one. Imposing was another. Confident, arrogant, but also all too competent. She was a proud young woman, and she stopped at nothing to accomplish her goals, whatever those might be. She was also widely considered gorgeous by both her allies and her enemies alike. With a curvaceous, voluptuous form, legs that went on for days, and hips and an ass to die for, there was no denying that Cinder Fall had it all going for her.

But there's always a bigger fish, isn't there? If any of her subordinates could see her now, they would be shocked to see that every inch of Cinder was tense with visible trepidation. Gone was the confidence and pride that the gorgeous femme fatale positively oozed out at times. Gone was any sign of the imposing young woman that threatened Vale as she did.

In her place was a nervous beauty who slowly made her way down the hall in front of her, with it's high ceiling and dark foreboding architecture. Red eyes peer out at her from the shadows all along the corridor, and white bone on black 'flesh' shifts back and forth as things, as Grimm specifically, prowl up and down the sides of the hallway she's walking down.

But those things in particular aren't what has Cinder so on edge. No, the Grimm have not been a source of fear or even anger for young Cinder Fall for quite some time. The one she feared… was their Mistress. Arriving at the double doors to the Queen of the Grimm's throne room just as that thought crosses her mind, Cinder swallows thickly, before ultimately squaring her shoulders and pushing on through.

There was no time to gather her thoughts, no moment to doddle outside of the Grimm Queen's throne room and procrastinate the coming meeting. After all, Salem saw all through the eyes of her Grimm, meaning that she already knew of Cinder's approach, and had known from the moment that the human woman's bullhead entered the Grimmlands. If Cinder dallied, she would be punished, undeniably.

Stepping into the throne room, Cinder Fall resists the urge to bite her lower lip. She also quiets the tremble in her body, holding herself perfectly still, even as she moves forward. Dressed in a beautiful red slip of a dress, with her long black curls draped over one shoulder and covering one half of her face, Cinder knew she was showing off a lot more skin then she would have preferred around the Grimm Queen. But even as she made her way forward in her high heels, she also knew it mattered little how much skin she was truly showing…

"Cinder… my dearest servant. You've finally returned to me. And what do you have to report, sweetling?"

Descending to her knees before Salem's throne, Cinder bows her head, her large ass coming down on her heels, which dig into her voluptuous derriere in response. The sensation grounds Cinder in a way and allows her to give her report somewhat concisely and promptly. She tells Salem about how their plans for Vale are progressing, she outlines the minor setbacks they've encountered so far, as well as the steps she's taken to correct them.

In a way, Cinder really has nothing to worry about. After all, she's been nothing but wildly successful so far. Yes, there have been some hiccups along the way, but she's gotten past all of them, smoothing over any bumps in the road before them and keeping the plan as her Mistress had outlined to her fully on track. She's done nothing but what Salem has asked for her and has no need to worry about being punished for failure.

That doesn't stop the young human woman from tensing up as the Queen of the Grimm rises from her throne, however. Nor does it stop her from finally beginning to tremble as Salem slowly descends off of her dais and down the stairs, eventually coming to a stop in front of Cinder's kneeling form, towering over her in the flowing black dress she wears, said dress doing nothing to cover up Salem's own wide hips.

"Rise, my dear."

For a moment, Cinder feels relief, and even a small amount of hope. She stands up and looks to her Mistress hopefully, only for Salem to respond with a cruel smile.

"Let us retire to my chambers. We will discuss your report in more detail there."

And like that, any hope Cinder had, dies a quick death. Ducking her head, blushing profusely, but knowing that she has no right to refuse her Mistress, the young woman simply allows Salem to turn her towards a side door in the throne room, one that Cinder knows from experience will lead to the Grimm Queen's chambers.

"Yes… Mistress…"

Salem chuckles darkly, and even as they walk, one of her bleached white hands descends upon Cinder's backside. Cinder tenses, even as the Queen of the Grimm casually slides up the back of Cinder's dress and slips her fingers into Cinder's cunt from behind, having no need to bypass the human's panties… because they didn't exist.

But then of course. Cinder knew better than to wear undergarments around Salem, knew better than to tempt the Grimm Queen's wrath with even a hint of rebellion or the like. This… this was all part of her deal with the Queen of the Grimm. Cinder Fall had always been an ambitious young woman. She'd always known she was meant for more than what the world had to offer. Living as a huntress, killing Grimm for lien and eventually dying as so many of the Kingdoms' protectors did… it'd never sat right with her, not even as a child.

When she'd grown up and found there was another option, Cinder had leapt at the chance, feet first. In the end, she'd been recruited by the Queen of the Grimm herself. Salem had offered Cinder a place at her side, and Cinder had eagerly accepted. Would she have, if she'd known what the cost would be? Yes… yes, she probably would've. Even still, Cinder had never expected the price for the advanced combat training that Salem gave her to be… to be tending to the Grimm Queen's every sexual need.

They arrive at Salem's luxurious quarters, and Cinder barely gets a few feet inside before Salem is pulling her fingers out of her cunt and hissing out an order.

"Kneel."

Cinder doesn't dare disobey. She sinks to her knees right then and there in the middle of the room, facing away from Salem… but not for long. As the Queen of the Grimm moves around to stand in front of Cinder, she reveals that she's pulled aside her dress. Leaving her massive futa cock to slap down on Cinder's face. The thing truly was gigantic, the lower half laid out across Cinder's face, causing her nostrils to be pulled up even as they flare open, breathing in Salem's musk. The upper half of the Grimm Queen's massive member is resting atop Cinder's head, hot and heavy on her scalp as she goes cross eyed just staring up at it.

"It's been a while, my dear. I've got a lot of… pressure built up for you. Why don't you do what you do best and make your Mistress feel good, hm?"

Shivering, Cinder knows that she has no choice but to obey. And of course, at the same time… part of her desperately wants to as well. Salem is gorgeous, beautiful, and most important of all, intoxicatingly powerful. The Grimm Queen is the strongest being on this entire planet. To submit to her… just makes sense. She's not just Cinder's bigger fish… she's everyone's.

Opening wide, Cinder leans back as far as she can and eventually takes the head of Salem's massive schlong into her mouth. The long-haired beauty's lips stretch WIDE around the Grimm Queen's fat futa cock, and she shudders a bit as she begins to choke and gag on the meaty shaft in her mouth. Her hands, however, remain steadfastly planted on the ground between her spread legs, keeping them from touching Salem. The Grimm Queen didn't need to say a word, Cinder already knew the rule well enough. No hands.

"Hulghk… Hulghk… Hulghk…"

Up and down Cinder goes, bobbing along Salem's cock, gagging and choking on it as she takes more than half of her Mistress' massive member into her mouth and down her throat. But as she always does, she struggles with getting any further than that. No matter what training Salem gives her in the arts of pleasure, no matter how many times Cinder tries to fully deep-throat Salem's cock all on her own… there's no denying that there are limits to human physiology that prevent her from doing so.

In the end, Salem sighs and grabs Cinder by her lush, long hair, dragging the human woman with her as she walks backwards and sits her fat pale behind down on the end of her bed. Once she's situated, Salem goes ahead and crosses her legs… over Cinder's shoulder. Sliding her long, muscular legs around Cinder's neck, the Grimm Queen proceeds to force Cinder much further down onto her cock then the human alone could ever hope to manage by herself.

"Gaaaagkh! Gagkh! Gagkh!"

"That's right. You're going to have to try harder than that, young lady. Don't worry… your Queen is here to help."

"Gagkh! Gagkh! Gagkh!"

The next few minutes are filled with nothing but the sounds of Cinder choking harshly on Salem's massive futa member, even as drool and saliva collect on her chin and slowly drop dip onto her chest. She's forcibly bobbed up and down on Salem's cock without pause, without hesitation, and all Cinder can do in response is take it, like the good little cum dump she is. Because while the Queen of the Grimm was much to proper to outright say it, that's exactly what Cinder was. She was the Grimm Queen's Cum Dump, plain and simple.

This is made all the more apparent when, a few minutes after beginning this relentless assault on Cinder's throat, Salem lets out a loud groan and then begins to cum. The Grimm Queen's thick load of white, hot seed is as overwhelming as ever for young Cinder Fall. Not once in her entire time as the Queen's… pet, has Cinder been able to swallow the Queen's seed. This time is no different, as the force of Salem's ejaculation leaves Cinder's head rocked back, and more and more of the Grimm Queen's cum explodes out of her nostrils and the sides of her mouth.

In the end, Salem pulls back and unloads the last portion of her release all over Cinder's face. That alone is more than enough to coat her features in a thick layer of the viscous cream, while at the same time Cinder's tongue lolls out of her mouth, unloading a good deal of white hot semen as she pants heavily, gasping and rasping for breath the only way she can, with how clogged her nose is.

Salem sighs at her as she looks down at the state of Cinder's face.

"… Wasteful, my dear. Simply wasteful."

That chiding tone is the only warning Cinder gets before Salem gets violent. Abruptly, the human woman finds herself face down, ass up on the ground, pinned in place by a horny, all too ready to fuck Queen of the Grimm. The massive futa prick that had been buried in Cinder's throat moments before, finds its home in the young woman's cunt instead, Salem not even having to move Cinder's dress aside, the short slip of a thing hiking up for her due to the position alone.

"OOOOH FUUUUCK!"

Cinder can't help the exclamation, even as her eyes go crossed and her mouth opens in a wide O. A loud, wanton moan leaves her throat as she shudders from the sensation of Salem forcing her cock deep into Cinder's sopping wet cunt. Because in the end… this part? This part makes it all worth it. This is what Cinder herself has become addicted to, the pleasure of getting senselessly POUNDED by the Queen of the Grimm herself.

The power behind each of Salem's thrusts ratchets up higher and higher as she plows Cinder into the ground. Cinder's hips lift as high as they can, while her arms lay flat out beneath her on either side. Her face is pressed into the ground… right up until Salem's hands find purchase around her throat, and the Grimm Queen causes her servant's head to lift off the ground as she begins to strangle her somewhat casually.

It feels all the better for it, though. The lack of air, combined with the feeling of being punched in the cervix by the biggest cock of her life over and over again… Cinder didn't start out as a filthy masochistic pig. But after her 'training' under Salem, she's certainly become one for the Queen of the Grimm. It was either this or lose her mind entirely… and Salem still had use for her in ways that didn't pertain to the bedroom, so in the end her Mistress had only gone this far in transforming Cinder into exactly what she wanted.

She was a tool, useful to Salem in numerous ways… but right now, she was only so useful to Salem as her cunt and her voluptuous body. Choking as the hands around her throat tighten, Cinder's eyes finally roll up in her skull, even as she cums around Salem's pistoning prick again and again and again.

"Don't pass out on me now, darling. I'd hate to have to find a replacement for you…"

Cinder latches onto those words as best she can. She can't fail now. She can't be replaced. She refuses. Instead… instead, she pushes her hips back into Salem's pistoning prick all the harder, cumming her brains out over and over, but never once does she fully pass out, even as Salem strangle-fucks her for hours on end. Cinder knows her place… its beneath her mistress, being whatever, the Queen of the Grimm needs her to be.

-x-X-x-

"Cinder… pet. You've been staring for a while now. You aren't fooling anyone."

Salem almost sounds kind, as she casually gropes Cinder's full ass while holding the young woman close to her. Cinder, meanwhile, flushes in embarrassment, her entire body trembling, her hands pressed up against Salem's chest as she stares down at the… at the twin monstrosities between her Mistress' legs.

It'd been several months since they'd last done this, since Salem had pinned her to the floor of the Grimm Queen's bedchamber and plowed her silly, all night long. After that night, Cinder had returned to Vale, had returned to her work as Salem's right-hand woman, working towards her Mistress' goals with the single-minded ferocity that she always had. None of her subordinates, from Emerald to Mercury, to Roman, had suspected a thing.

All they'd known was that Cinder had gone on a trip, and when she came back, it was with more resources, and a certain vigor to her that spoke of renewed desire to see the plan to fruition. What had followed was everything that Salem had wanted. The fall of Beacon. The death of Ozpin… and Cinder Fall taking the last of the Fall Maiden's powers for herself, killing that red-haired girl who thought to stop her and absorbing the Maiden Power within her.

Now, Cinder was the Fall Maiden in totality. But… she hadn't come out of it unscathed. Her hair was still somewhat short, from where it'd had to be cut in order to deal with the trauma done to the right side of her face. Her body was still as pristine as ever otherwise, though… and it seemed like her new dress, an even skimpier red and gold thing that more closely resembled Salem's own dress in the way it exposed Cinder's hips, had attracted the Grimm Queen's attention.

That was about the time Cinder had discovered that much like she had, Salem had gone through a change in their time apart. Casually lifting aside her black dress, the Grimm Queen had revealed not one, but two massive futa cocks to Cinder with a wicked grin on her face. Mesmerized, Cinder had been unable to stop herself from approaching. And now here she was, with the heat of Salem's dual monstrosities pressing into her hip even as the Queen of the Grimm gropes her ass.

In response to Salem's words, Cinder can do naught but stutter.

"T-That's not… I…"

"Come now. We both know what you really want, so why don't you get down on your kneels? There's a good girl…"

As Salem cuts her off and orders her to kneel, Cinder is helpless to resist. Not just because the Grimm Queen is her Mistress and she has to obey, but because she wants to. Because Salem is right… they do both know what she really wants. As Cinder descends to her knees, Salem's twin cocks bounce up and down on her face for a moment before the Grimm Queen hums and then decides that this isn't the exact position she wants.

Instead, Salem herself also kneels, spreading her muscular legs apart as she does so. Cinder finds herself having to bend forward, ending up with her ass in the air and her upper half low to the ground as her lips and tongue slide all over the lower of Salem's two fat futa cocks. In the end, that's the one Cinder takes into her mouth, sucking and slurping at her Mistress cock quite enthusiastically. It's embarrassing and humiliating, but also immensely arousing, and her pussy is outright twitching with desire and need as she holds onto Salem's thighs for dear life while bobbing up and down on the Grimm Queen's cock.

"Hulghk! Hulghk! Hulghk!"

"Mm… you're going to have to go further than that to keep my attention, my dear~"

Cinder does her best, but for all the power that becoming the Fall Maiden has given her, in this particular arena, she still has her limits, and those limits are quite obvious right now, even as Salem gets more and more… frustrated with her. Eventually, the Queen of the Grimm lets out a frustrated growl and abruptly rises. She twirls over Cinder's head faster than the young woman can keep track of, and before Cinder can even realize what's happening, Salem is standing tall and proud behind her… without ever having taken her lower cock out of the young woman's throat.

Cinder's back is arched rather painfully, and she finds herself with her nose and the upper half of her face pressed up against Salem's big, churning ball sack, even as the woman grabs her by her throat and thrusts into her esophagus and gullet like she's… like she's some sort of sex toy.

"Gagkh! Gagkh! Gagkh!"

"Like this! Mm, that's it, dear girl. Keep it up… show me what you're made of, Cinder! Take it all!"

And then she begins to cum. In her current position… Cinder actually doesn't end up spitting back up most of Salem's load like she usually does. Instead, with the Grimm Queen's futa cock buried so far down Cinder's gullet, the vast majority of Salem's load ends up going right into the human woman's stomach. Of course, that's to say nothing for the other cock. Salem's top cock also explodes in its own release as Cinder chokes on the bottom one, and the seed from that massive member sprays all over Cinder's body, covering her in a thick deluge of cum and soaking her red and gold dress in no time at all, even as Cinder herself soaks through the crotch of said garment from her repeated orgasms.

But of course, Salem is far from done with her.

"You like that, young lady? I know you did. Look at how wet you are, my dear. Such a good little girl… time for a reward."

Reaching down, Salem grabs Cinder by her ankles and YANKS. Cinder's eyes widen but other than that she has no chance to react as she finds herself lifted up into the air. Grabbing into Salem's legs for dear life is all the new Fall Maiden can do, even as Salem pulls back enough that just the head of her cock is inside of Cinder's already stretched mouth. Then, without hesitation, the Grimm Queen presses the head of her second cock up against the smallest of gaps between Cinder's upper lip and Salem's lower prick.

In that moment, as Salem proceeds to shove BOTH of her futa pricks into Cinder's mouth and down her throat, the young woman is confident she's about to die. At the very least, she expects to feel nothing but agony as her jaw dislocates, or worse, breaks. There's absolutely no way that she's capable of taking both of Salem's massive, monstrous members into her mouth and down her throat at the same time.

And yet, that's exactly what Cinder finds herself doing, upside down with her hands palm down on Salem's muscular legs, the Fall Maiden takes both of the Grimm Queen's cocks into her throat without much issue… oh sure, she still chokes hard on Salem's twin cocks, but there's no pain, no breaking of her jaw, no tearing of her throat.

"GAGKH! GAGKH! GAGKH!"

"You're surprised, my dear… I can feel it~ Did you think I would kill you so quickly after all that I've done for you? Silly girl… you're the Fall Maiden now. That comes with a bit more… durability."

Cinder is tangentially aware that her Mistress is talking to her… just like she's tangentially aware of the fact that she's squirting pussy juices out of her cunt at a constant rate at this point, orgasming again and again and again. But that latter fact somewhat cancels out the words Salem is saying, keeps them from reaching Cinder, or at least, keeps her from being able to process them.

As Salem continues to fuck her human pet's throat, the Grimm Queen pauses and then chuckles.

"You're not listening to a word I've said, are you, you silly little slut? Well then… why even bother…"

And with that, the Queen of the Grimm speeds up the pace, fucking Cinder's throat even harder, even faster.

"GAGKH! GAGKH! GAGKH!"

"That's right! Right there! Throat them both!"

Once again, Cinder finds herself wondering if she's going to die. But before she can fully asphyxiate on Salem's cock, the Grimm Queen is once again cumming, pouring bucket loads of seed down the young woman's throat. This time, Salem definitely isn't able to swallow it, much of the cum flowing out of her nostrils and her mouth alike, slowly sliding down Salem's balls and muscular thighs.

"Sooo sloppy~"

Once more, her Queen and Mistress moves too fast for Cinder to comprehend. One moment, she's half-upside down, lifted up in the air. The next, she's astride Salem, with her legs spread in a half-split on either side of the Grimm Queen, and Salem's muscular thighs clenching tightly around Cinder's head as she forces the young woman to continue taking both of her big fat cocks down her throat.

"Here, try again! Snuggle up and start chugging, young lady~"

As if on command (which it probably is) Salem starts cumming once more, after she JUST got done. All Cinder can do in such a situation is grab hold of her Mistress' ass with both hands, sinking her fingers in nice and deep as she chugs and chugs and chugs, just like she's been told. Gulping down Salem's seed… her face red and her eyes nearly rolled back in her head, Cinder can't help but want more. It tastes so good, her Mistress' cum. And thanks to her new Fall Maiden powers, she can handle more of her Mistress' violent sexual tendencies then she ever has before.

Needless to say, the rest of the night is spent with Salem making liberal use of her human pet. At some point, both of them lose their dresses. At some point or other, Salem fucks Cinder in every single one of her holes with those big fat futa cocks of hers. In the end though, the Grimm Queen always returns to Cinder's throat, using the young woman's mouth and throat as her own personal fuck hole time and time again. And always, every time, the Queen of the Grimm says the same thing to her, teasing and toying with her.

Right now, is no different, with Salem sitting on Cinder's face, both of her futa cocks buried in the Fall Maiden's throat, and her ball sack resting on Cinder's face. As she bounces her balls up and down on Cinder's flaring nostrils and fucks her cocks in and out of the woman's throat, Salem looks back over her shoulder at Cinder and positively cackles.

"Don't forget to breathe, darling~"

Needless to say, Cinder is doing her best… but even she needs a bit of oxygen now and then. Still, she can't disobey her Mistress, can't fight back. In the end, she's nothing but Salem's plaything. And perhaps that's exactly where she wants to be.

-x-X-x-

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