The Fourth Siren

by Dr Sharaz Jek

Rating: mature
Tags: Profanity, Non-consensual, Equestria Girls, Violence, Sex, Sunset Shimmer, Gore, Dazzlings, Dark, Sonata Dusk, Death, Alternate Universe, Aria Blaze, Porn, Fetish, Adagio Dazzle, Suicide / Self Harm, Horror
Length: 3200

Transformed into mermaid-styled hybrids during Nightmare Night, the Dazzlings encounter another siren and welcome her to the fold.

Nightmare Moon unleashes an eternal Nightmare Night, the darkness within humans transforming some of them into monsters. Among those are the Dazzlings, who discover a fourth siren. But what will happen when they run into Sunset Shimmer?

A Halloween special! My entry for the October 2019 Incest Is Wincest Spoopy/Costume Contest.

Published 2019-10-05 00:30:02 UTC
Last updated 2019-10-05 00:30:02 UTC

Every Day Is Nightmare Night

Ever since Luna ascended to Nightmare Moon, the world altered to suit her whims. Darkness cloaked the land in a permanent night. A pale yellow moon sat suspended in the sky, surrounded by rolling black clouds and a sea of twinkling stars. With this new status quo humanity was driven into hiding, as the monsters came out to play, predators hunting down their prey for sustenance or mere sport.

Some were transformed by the evil within them to better suit this eternal Nightmare Night as it had been dubbed. Among those three were the Dazzlings; a trio of sirens banished here, and rendered powerless for a time. Until now.

Trapped somewhere between their former siren forms, and the human women they'd become, their shapely physiques bare. They rested upon rocks amidst the sea while waves crashed around them, the droplets slipping down supple breasts, over the curves of their backs and navels, over hips and buttocks, until shiny scales started to appear where their legs should be that were now fish tails. Their tight slits started at their vulvae and bled into their fishy portion, which swished about in the ocean.

“Mmm,” moaned Adagio who flicked fin-like ears and massaged cool water into her heavy bosom. “We are perfection, aren't we?” Vaingloriously she stared into her reflection on the dark seas, the radiant face of an otherwise human woman staring back and illuminated by the lunar rays. “Why, I always knew Luna was weak. That she'd easily submit to her jealous, inferior nature. But even a mouse can become a lion in the right circumstances. Sadly, it seems the darkness has mastered her!” She laughed.

“This is fun! It's kinda like when we used to go skinny-dipping!” Sonata giggled and splashed, even more voluptuous than the eldest sister. “Oh, but we never worried about clothes or niceties like that when we were sirens, huh?”

“Of course not, you idiot.” The middle sibling, Aria, was rather lithe but slightly toned. Wearing a perpetual snarl, she slapped her tail on the craggy stone, the abrasive wet smack like music to her ears. “This is boring! We should be out hunting!”

“Typical philistine.” Curling a lock around her index finger with a sultry pout, Adagio studied her with pursed lips and half-lidded eyes. “Some things cannot be rushed. Although, I am beginning to work up an appetite.” She rubbed her belly, the side of their stomachs covered in gills which contracted with each breath. “But first, how about some fun?”

“Ooh, ooh!” Sonata bounced her bare bottom on the slick stone below, throwing up her arms and bouncing her udders which knocked together, topped by incredibly wide nipples that perked up in the cool sea breeze. “Start with me!”

“Please! I'm obviously the superior choice,” replied Aria who crossed her arms over her petite but perky tits with a sneer.

“Hmm, I don't know. It is a tough choice, I'll admit. But...” A maniacal smile crossed Adagio, seeing their would-be fourth companion swimming on the horizon. “I have a better idea. Come here dear!” She beckoned her over with a finger.

Waves rippled around the newcomer, who swam up with a wiggle of her ample hip, dragging a role attached to a float behind her. Fiery hair with golden highlights trailed in the wind, grinning as she proudly displayed a lovely frame similar to Adagio's.

“Sunset Shimmer?!” Aria and Sonata exclaimed in unison, their eyes wide. “Why is she here?!” Even stranger it appeared she'd somehow become half-siren too, her crimson scales shimmering like her namesake.

“Believe it or not, she's one of us now.” Adagio took Sunset's hands, their fingers interlinking, and they nuzzled each other's cheeks before they shared a drawn out kiss. “Mmph, delicious, as always. And I see you brought tonight's feast.”

“Of course, mistress. I now know we're destined to rule together!” Sunset settled beside her.

Aria cocked an eyebrow. “But how?! I thought you went straight!”

“Oh, I did. Or maybe I should say, she did!” Sunset nodded at the float, tossing off the tarp over a bundle.

Sonata waded over and stared at another Sunset Shimmer, this one fully human, hogtied completely naked by knotted ropes with a ball-gag stuffed into her mouth. Squirming, she squirmed helpless, watery eyes turned to saucers as muffled cries escaped. “Wow, two Sunsets?! Um, I don't get it. Did you find a counterpart from here or Equestria, or something?”

“Not quite. We were split in two when Nightmare Moon's darkness tried to take root in her heart,” explained Sunset with a wicked titter. “I'm back to my old self, the one this boring, bland little imposter saint tried to heartlessly murder!”

“I get it. Kinda like a ying-yang duality,” noted Aria who couldn't help but grin. “Yeah, the new you really sucked. Other than a bit of a temper you turned into a typical nice girl, like Cadance with a few more quirks.” She rolled her eyes and stuck out her tongue. “Don't we have enough goody-two shoes in this town? Now a bad girl who could help us raise some hell-!”

“This is so awesome! I always wanted another sister!” Sonata beamed even wider. “But what about the other one?”

“Like I said, dinner.” Sunset patted her doppelganger's plush buttocks. “Don't they look so ripe and juicy? I can almost taste them now,” the fourth siren purred when she started to drool, gaze fixated upon her shivering twin's succulent body.

“No one will even know what truly happened,” taunted Adagio who cupped one of their prisoner's tits and kneaded the squishy flesh. “All your friends will think you betrayed them, turned back to your old ways, and curse your name. Well, until we get bored of them and hunt them down one-by-one, too. No one will mourn you. Maybe I'll even fuck Flash Sentry too, for kicks?”

Choking on bitter sobs, the purified Sunset resigned herself to her fate. She closed her eyes as they surrounded her like a school of ravenous sharks, the foursome groping her slippery skin all over, almost like they were tendering their coming feast.

“Damn, I'm hot. It's a shame I can only eat you up once,” said Sunset with a lick of her full lips. Oh, and I'll take your privacy invasion power too, asshole." She pointed to the geode placed in a choker on her neck. "No more violating others for you!"

“Almost a pity we have to share her, as well.” Adagio cupped and squeezed their food's knockers. “Ah well, think of it like this. It will be an excellent bonding experience. A ritual to welcome our sister and the fourth siren into the Dazzlings. But first, let us celebrate. We'll make love under the stars and moon. It will be so romantic. Consider her dessert.” She winked.

Claiming Sunset for her own, Adagio pulled her moist body close, their bosoms pressed together while their lips locked anew. As usual Aria and Sonata were left to tend one-another, their often shared disdain and resentment soon spilling out into sexual tension. Their tails intertwined while they kissed and molested the other, in a mad fit of passion for dominance.

Sirens were closer to animals than people. Beasts of prey who'd been wrongly judgment and condemned by ponies and the hypocritical, self-righteous society they'd built and enforced. But now they no longer needed to hide their predatory nature, humanity theirs to prey upon at their leisure. Nightmare Moon had returned this world, at least, to its natural order. Survival of the fittest. There was no need for shame or guilt. Simply to take whatever they so desired in this more primal, barbarous age.

Embracing the other, Adagio and Sunset swam as one, making out while their labia caressed. No longer bound by their female shapes alone, their lower lips likewise interlocked and suckled upon inflamed pussy folds, like a pair of extra mouths.

And from within those hot pink canals, all the way from their slippery wombs, tongues emerged from their cervices, wrestling while they explored the other siren's moist tunnels. Schlicks sounded when the muscles dove deep and licked out gooey walls.

Sirens appeared lovely on the surface to lure in their foolhardy prey; in truth they were closer to Lovecraftian eldritch horrors.

“You're wonderful, Sunset.” Adagio huffed and heaved her bosom, their maws still connected by strings of hot saliva.

“So are you. Thanks for reminding me who I really am. Not that Elements of Harmony soul-raped piece of garbage.” Sunset glared at her counterpart for a moment, their cheeks colored while their feminine fissures glistened, gaping wide open while they made out. “Oh, this new body's so wonderful. I thought it was a little weird at first, I'll admit, but who gives a damn when it feels this good?”

Similarly Aria indulged herself by slapping about Sonata's pendulous boobs, watching them hypnotically slam together. Growling with envy, she roughly mashed them, distending nipples far as she could when she tugged on them, twisting them about like knobs to a radio where all the available stations sucked ass. “Damn it, why are you so blessed?!”

“Aw, don't feel bad little minnow!” Sonata jiggled her gargantuan buttocks with a swivel of her hips. “Your itty-bitty-titties are plenty cute! Just straight up totes adorable, for realsies! She teased her with a poke to the nose that made her cross-eyed.

“Shut it, bitch.” Their lower halves engaged in a similar fencing match, tongues darting in-and-out of their chosen lover.

“You're such a sweet talker, Blazey!” She tittered and pressed her palms to Aria, flicking pert titties and spanking small buttcheeks. Bright rays fell upon the foursome, their bodies wading halfway on the sea foam-clouded surface.

Watching them make love, Sunset reflected on her short life, all the things she'd never do now. The way she saw it, there were two choices; she could either continue to pray while they buttered themselves up for their ritualistic feast, or she could roll over the side of the float, and perhaps drown herself to rob them in a final act of spite. But no, she refused to end it like that, no matter the circumstances. She wouldn't take the coward's way out, but would try and face the end with some dignity intact.

“Well, it's about time.” Sunset snickered and headed back over to the float. “I'm sure you're still thinking about some noble crap, even now. You know what? I was wrong, all those years ago. I am a monster. Time I played the part!” Her pupils turned to cat-like slits, her mouth opening unimaginably wide, exposing rows-upon-rows of razor-sharp, barracuda-like teeth.

She slobbered over Shimmer's bound and denuded form, making her thrash under the warm saliva that rolled down her, bladder emptying down her thighs as she shrieked into her gag overwhelmed by sheer butt-clenching terror. That merely made the sirens hungrier, not to mention wetter, their hands once again pinching and groping at her exposed female flesh.

Bending over, they pressed their maws to her, nibbling and sucking on her skin. Sometimes they would pause and exchange pecks between them, trading partners on a whim and in every possible combination, the better to strengthen their kinship.

Their food rocked about, her face burning redder. “What have we here?” Adagio traced up her thigh, tracing her womanly cleft, her fingertip doused in lubrication which she sniffed and tasted. “I think she's enjoying this more than she'll admit.”

"Let's give a new meaning to eating pussy," said the evil Sunset who slowly licked her lips.

Aria spread their treat's asscheeks to further humiliate her, staring at her puckered taint. She sank her elongated tongue in, kissing the ring of her asshole while she probed her anal fissure. “Let's season the slut, huh sisters?”

“Hooray!” Sonata helped them carry their slave to the rocks, where they redid the ropes, spreading her out spread eagle. She was tied to more stones all around them, the extensions drawn taught, her virginal delicacies laid open to them. The youngest Dazzling was the first to start furiously masturbating while hovering over her, spattering her in specks of pussy juice.

Her eyes rolled into her head and she moaned low, the others soon joining her, jabbing digits into themselves and their lusty kindred. “Wait,” called Aria. “I want to hear her scream!” She ripped off the gag, watching their fucktoy drool.

Their cunts pushed open like they were giving birth, shrieking in unison much like when the sirens sang, squirting all over a quickly soaked Sunset, who's double took special care to coat her face with translucent, sticky lubricants.

The hapless Sunset squeezed her eyes shut and coughed, accidentally swallowing a mouthful. The tangy taste lingered on her taste buds. “N-no more.” Silent tears rolled down her cheeks. “Just kill me already. Get it over with.”

“Nah.” Aria dug out a sack she kept hidden in the rocks, where she and her sisters kept stuff they'd collected as humans, or junk they either scavenged or stole from their victims. She whipped out her waterproof cellphone. “Glad this baby's held up. Sure, it's a bitch to come back to land, shed these scales a while, and search for somewhere to charge it back up, but it's so worth it!”

“Another snuff film?” Adagio chuckled, watching her turn it on. “Nevertheless, I do enjoy your rather...avante garde works.”

“Ava-what-now?” Sonata stared skyward, rubbing her chin. “Well anyhow, your films are super creepy cool!”

Aria was already busy with her amateur directing, capturing all the best angles, zooming in on all her unmentionables and especially her anguished expression. She'd record it for later, like she did with most of those they slaughtered, and schlick herself senseless to all the gruesome details. “Shit, maybe I should've been a porn director. Line up, bitches!”

Shaking her head, Adagio traced a single nail between dinner's breast, over her midsection, and upon her twat, touching her lovebud and down her sticky snatch. “Unfortunately, that's more than enough foreplay. We're all famished, I'm sure.” Her fingernails extended like claws, and Sunset winced, certain she was about to slit her wide open.

Instead the swipes cut into the ropes, setting her free as she tumbled onto her back. She scurried over the rocks, nearly slipping on the sea lice running underfoot, seeing nothing but endless seas around her. Sure, she could make it to the raft, but trying to outrun them on that was a joke. Knowing she was doomed, she instead dove into the dark waters, hoping to drown herself.

Yet like a cat toying with its prey, it was exactly what the four desired, to watch her futilely struggle to the end. Piranha-like, they dove and beset her from all sides, their maws widening to reveal horrific serrated teeth. Worse still tentacles arose from their wombs, a pit of them extending from their pussies, wrapping around their prize.

Aria was still filming even now while they forced her back to the surface. Their coils forced her limbs open, tentacle-upon-tentacle shoved into every orifice, overlapping as they overstuffed her. She juddered, her insides distended, piercing almost all-the-way through their personal bitch.

Rather than bear the eggs they kept stored within them, they used the tentacles to pump them into her slippery womb, her stomach bloating out like she'd been heavily impregnated. Spherical shapes stacked together distended her stretched belly.

“Take it you whore,” hissed Aria while they rode out a shared orgasmic birth, their faces twisted lewdly. Sirens were supposed to deposit them on the seabed, for passing fish to spill their sperm upon and inseminate, but they liked to intentionally keep them stored inside for moments like these, an extra layer of humiliation for anyone unfortunate enough to cross them.

Withdrawing moments before Sunset's battered psyche finally broke, they pressed close to her again, their open pussies closing upon both her breasts and buttocks. At first they suckled almost casually, then with more force, until the teeth of their vagina dentata poked out. They sunk into her tits and ass, biting in, making her howl as she screamed and wept like a little biatch.

Flesh shredded between clamped teeth, her tits ripped straight off in a shower of blood by her other self and Adagio, raining all over them. Aria and Sonata did the same to her asscheeks, chewing on the delicious, torn meat, the chunks sticking between their teeth. Taking special care to draw out her torment, a crimson pool formed around the Dazzlings.

They scooped up the gooey mess, rubbing it into their slippery bosoms. “My past is not today~” Sang the evil Sunset while she watched her double twitch and wail and slowly lose the color of her eyes. They continued to tear strips from her, stripping muscle away and revealing bone, until she mercifully expired with a shuddering breath between the monsters.

“Lots of yummy fat in all the right places!” Sonata talked with her mouth full, her bloodied lips smacking.

“Welcome to the fold Sunset,” mused Adagio who licked her fingers clean of stringy meat.

“We're really gonna raise hell,” swore Aria who gave the carcass both middle fingers.

Eventually nothing but a skeleton remained, Aria's phone still placed on a rock to record all the grisly details. She'd send them all a high-definition copy later, maybe add a few filters to make it more badass. Of course Sonata just thought it was weird, Adagio tacky, but they appreciated her artistic touch anyhow, thankful it spiced up their bedroom antics.

"Lemme see that. I want to take a selfie!" Sonata snatched the cellphone, pressing the skull between her smooshed up breasts, and clicking the button with a duck face. "Let's add a caption, too!"

I TOTES RAPED AND MURDERED YOUR MARY SUE WAIFU! XOXO

"There, that should make her fans cry!" She giggled.

"And people think you're the nice, misunderstood siren." Aria shook her head, baffled.

"They're even stupider than I am! Probably the male equivalent of dumb sluts who fangirl over serial killers!" Sonata raised the skull overhead, swishing her titties as she started dancing. "I'll add some hearts to it later, after you upload it!"

"Why do we keep someone so useless around again? Oh right. Tired taco memes," muttered Aria who recovered her phone. "Hey, check out Sunset's fansite. I saved an offline copy." She showed it around. "See the motto? Love and tolerate my ass! The moment you disagree with their self-righteous cult you're not a true fan, whatever that means!"

"Indeed. Some of them make us look nice," said Adagio who raised a hand to her mouth and yawned.

"How about the we kill that overrated cunt Luna next? I'll shove a scalpel up her cooter," chuckled Aria. "Then I'll slowly skin her alive!"

"A shame there's no romantic sunset. But you're the only Sunset I need," said Adagio taking her new sister's hand while they nuzzled in the darkness.

Soon they would take Nightmare Moon's place as the true Queens of darkness. And now that the real Sunset Shimmer was with them? Well, the hunt would soon prove even better than ever...