Eclipsed Desires

by Caladis

Rating: mature
Tags: Princess Luna, My Little Pony: Friendship is Magic, Nightmare Moon, Romance, Porn, Sex, Fetish, Princess Celestia
Length: 6385

Celestia wants to spend Nightmare with her sister Luna in a Special Way

Contest Entry for Wincest's Cloptober Contest where it won 2nd place!

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As Celestia and Luna finds themselves drawn into each other's seductive power plays, the line between playful sibling rivalry and forbidden passion blurs. But when the night ends, Celestia must reconcile the intense lust she felt with the playful nature of her sister's dark game. A night of dominance, submission, and deep bonds that neither sister will soon forget.

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Story Contains: Incest, F/F, Mind Games, Playful Reconciliation

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Cover art by 90Sigma

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Featured 10-04-24

Published 2024-10-04 09:20:00 UTC
Last updated 2024-10-04 09:20:00 UTC

Shadow of the Moon

Nightmare Night descended upon Canterlot like a shroud of darkness, the foal-ish festival celebrated with grim pageantry and fear. This year, the theme was "The Eclipse of the Moon", a chilling ode to the legends of Luna’s fall from grace, her transformation into Nightmare Moon, and the bitter, violent clash that had once left the night forsaken. The citizens of Canterlot reveled in it, adorning their streets with effigies of monsters and twisted replicas of Luna’s shadowed form. Fear and awe stirred together in the chilly autumn air as foals ran through the streets, shrieking in mock terror, unaware of how close their nightmare came to reality.

High above the city, Luna stood on the edge of the castle’s grand balcony, her wings tucked tightly against her body as she gazed down at the festivities below. She should have felt pride, she thought - this was her night, her time, the one day a year Equestria acknowledged the power and allure of the night. Yet, as the crowds cheered and laughter filled the air, Luna felt nothing but a cold, gnawing emptiness. They celebrated her shadow, her darkest self, but they did not truly see her.

The vast expanse of the night sky stretched out before her, glittering with stars, and yet it felt distant - unreachable. Even in the heart of her own holiday, Luna felt the sting of solitude. She was the ruler of the night, but no one, not even her sister, truly understood what it was to be the night, to embody the darkness and all that came with it.

A soft laugh echoed from behind her, breaking her thoughts. Luna didn’t need to turn to know who it was. Celestia. She could feel her sister’s presence, warm and radiant as the sun she commanded, yet tonight, there was an edge to it, something darker. Celestia’s laugh had never sounded quite like that before.

"It’s quite the spectacle, isn’t it?" Celestia said, stepping forward until she stood beside Luna. Her mane flowed in a shimmering wave of pastel light, but her eyes, when they met Luna’s, were dark, filled with something Luna couldn't quite place. "They celebrate you, Luna. The fear, the power. It’s intoxicating, isn’t it?"

Luna glanced at her sister, her gaze sharp. "They don’t celebrate me, sister. They celebrate a ghost, a shadow of who I was." Her voice carried a bitter edge, a resentment that still lingered, even after all these years. "They fear what I once became... not who I am."

Celestia’s smile widened, but it wasn’t the kind, benevolent smile she usually gave. It was something darker, more knowing. "And isn’t that exactly what makes this night so special?" she whispered, stepping closer, her breath hot against Luna’s ear. "They fear you, Luna. Fear has power. It always has."

Luna stiffened at her sister’s words, a shiver running down her spine. There was a familiarity to this conversation, something that tugged at memories she would rather forget.

"You sound like Nightmare Moon," Luna said, her voice low and dangerous.

Celestia laughed again, a soft, melodic sound that sent another shiver through Luna. "Do I?" she asked, her tone playful but with an undercurrent of something far more sinister. "Perhaps it’s because tonight, I understand her more than I ever have. This night, Luna... it belongs to you. But what if you shared it?"

Luna’s heart skipped a beat, her breath catching in her throat. "What do you mean?"

Celestia stepped closer still, her body brushing against Luna’s, warm and soft in the cool night air. "I mean, you shouldn’t have to rule the night alone, dear sister. You shouldn’t have to bear that weight... that power... without someone to share it with. Someone who understands you, who craves you, just as you are."

Luna turned, her eyes narrowing as she met her sister’s gaze. "You? You understand me?" Her voice was thick with disbelief, but beneath that, something else stirred. Curiosity. Desire.

Celestia’s smile didn’t waver. "More than you know, Luna. I’ve always watched you, from the shadows, even when you thought you were alone. I’ve seen your power, your beauty... and I’ve wanted it. I’ve wanted you."

The words hung in the air between them, heavy with implication. Luna stared at her sister, her heart racing. This was her night, her holiday, the one time of the year where she was meant to be celebrated, and yet here was Celestia, taking even that from her. Yet... something in her couldn’t deny the thrill that ran through her at her sister’s words.

Luna turned back toward the city below, her wings twitching as she tried to steady herself. "And what would you have of me, Celestia?" she asked, her voice low, steady. "What do you truly want?"

Celestia’s hoof trailed down her back, a soft, teasing touch that sent a shock of heat through Luna’s body. "I want you, Luna," she whispered, her voice as smooth as silk. "I’ve always wanted you."

Luna’s breath hitched as she felt Celestia’s body press against her, warm and inviting. For a moment, she said nothing, her mind spinning as she tried to make sense of what was happening. But then she remembered the darkness, the loneliness that had always lingered just beneath the surface, and she realized... she didn’t want to be alone anymore.

Luna turned, her eyes dark with need, her breath coming in shallow, ragged gasps. "Then take me," she whispered, her voice trembling. "Take me, sister, if that’s what you desire."

Celestia’s smile widened, her eyes gleaming with triumph. "Oh, Luna," she whispered, her voice a low, sultry purr. "I knew you would come around."

And with that, Celestia’s lips crashed against hers, their bodies entwining in the shadows of the night, the distant sounds of Nightmare Night celebrations fading into nothing as they lost themselves in each other.

This was now their night, their moment, and for once, Luna didn’t feel so alone.

Celestia's kiss was feverish, desperate - like she had waited centuries for this moment. Luna’s world spun as her older sister pressed her back against the cool stone of the balcony wall. The city below continued to celebrate, ignorant of the illicit scene unfolding high above them. Luna’s wings fluttered helplessly, trapped between her and the stone, as Celestia's hooves roamed her body with a hunger Luna had never seen in her before.

The night air was cool, but Luna felt hot, her breath coming in ragged gasps as Celestia’s mouth moved from her lips to her neck, nipping and biting, leaving small marks of possession.

"Celestia..." Luna moaned, her voice barely more than a whisper, caught somewhere between disbelief and raw, aching need.

"You feel it too, don’t you?" Celestia breathed against her skin, her horn glowing faintly as she used her magic to part Luna’s ethereal mane, exposing the curve of her throat. "This is what we’ve both wanted, Luna. For far too long."

Luna’s eyes fluttered shut, a soft whimper escaping her as Celestia's hoof slid lower, tracing over her cutie mark, teasing the sensitive skin beneath her dark fur. "Don’t... don’t stop," Luna gasped, her wings straining against the wall as her body instinctively pressed closer to Celestia’s touch.

"Never," Celestia purred, her voice filled with dark promise.

The moon hung high in the sky, casting long shadows across the two princesses. Luna’s breath hitched as Celestia's hoof found its way between her legs, brushing against her already damp slit.

"You’re so wet, little sister," Celestia whispered, her breath hot against Luna’s ear, sending shivers down her spine. "Have you been waiting for this? Have you thought about me... about us?"

Luna bit her lip, refusing to answer, but her body betrayed her, pushing against Celestia’s hoof, seeking more. Her mind was a whirlwind of conflicting emotions - this was wrong, so wrong, but gods, it felt so right. Celestia knew her, better than anyone. Knew her power, her loneliness, her darkest desires.

Celestia chuckled, a low, sultry sound that sent another wave of heat through Luna’s body. "You don’t have to hide it from me, Luna," she whispered, slipping her hoof deeper, parting Luna’s slick folds with ease. "You don’t have to hide anything from me."

Luna gasped, her body jerking as Celestia’s hoof rubbed against her clit, sending sparks of pleasure shooting through her. "Celestia..." she moaned, her voice breaking. She had never felt anything like this before - the intensity of it, the overwhelming need that consumed her.

Celestia pressed her lips to Luna’s ear, her breath coming in hot, ragged bursts. "You belong to me, Luna," she whispered, her voice a low, seductive growl. "You always have. And tonight, I’m going to remind you exactly who you are."

Luna’s mind went blank as Celestia’s magic flared to life, a golden aura enveloping her body. She felt the warmth of her sister’s magic slide down her spine, wrapping around her, pulling her closer, pressing her harder against the cold stone wall. Celestia’s hoof moved faster, each stroke sending ripples of pleasure through her as her hips bucked, desperate for more.

"Yes... yes..." Luna panted, her wings fluttering helplessly against the stone as her body surrendered completely to the sensation. She felt herself teetering on the edge of something vast and terrifying, something that threatened to consume her entirely, but she didn’t care. She wanted it - needed it.

Celestia smiled against her neck, her lips brushing over Luna’s pulse, feeling how fast it raced beneath her skin. "That’s it, sister," Celestia purred, her voice thick with desire. "Give in. Let me see you. The real you."

Luna’s breath hitched as Celestia’s hoof pressed harder against her clit, rubbing in tight circles that made her legs tremble. "Celestia...!" she gasped, her body quivering as she felt herself slipping over the edge. She could feel the magic building between them, dark and wild, just like the night itself.

With a strangled cry, Luna came, her whole body convulsing as waves of pleasure crashed through her. She felt herself falling, spiraling, her magic flaring wildly as she clung to her sister, her only anchor in the storm.

Celestia held her, her hoof still moving, drawing out every last bit of Luna’s orgasm until she was left shaking and breathless. Only then did Celestia pull back, her eyes gleaming with satisfaction as she watched Luna struggle to catch her breath.

"You see now, don’t you?" Celestia whispered, her voice dripping with smug triumph. "You were never meant to be alone. You were meant to be mine."

Luna’s heart pounded in her chest, her mind still reeling from the intensity of what had just happened. She looked up at Celestia, her breath still coming in short, sharp bursts. "And what now, sister?" she asked, her voice trembling, barely more than a whisper.

Celestia smiled, her eyes dark and full of promises. "Now, dear Luna," she purred, leaning in close, her lips brushing against Luna’s once more, "we show the world what it means to fear the night."

* * *

Luna's breath steadied, her body still thrumming with the aftershocks of pleasure as she stared at her sister, her heart pounding with something far darker than desire. Celestia’s smug smile sent a ripple of defiance through her, reigniting a fire that had long been smothered. The words came unbidden, low and dangerous, dripping with a long-buried power.

“Fear the night?” Luna whispered, her voice a soft, deadly hiss. Her eyes darkened, glowing faintly as her magic surged, feeding on the shadows around her. “No, Celestia. I’ll show you fear.”

Before Celestia could react, a dark pulse of energy rippled out from Luna, swirling around her like a tempest. Her mane, once shimmering with the gentle light of the stars, became a void - a swirling mass of cosmic darkness that seemed to devour the light. Her body grew taller, her form more imposing, the air around her crackling with raw, untamed power. The familiar softness of Luna was gone, replaced by something ancient, something terrible.

Nightmare Moon had returned.

Celestia’s smug smile faltered as the realization dawned. “L-Luna...”

But it wasn’t Luna who stood before her anymore.

Nightmare Moon’s laughter echoed across the balcony, rich and cold. Her fanged grin gleamed in the pale moonlight as she towered over Celestia, her eyes glowing with a predatory hunger. “Oh, sister,” she purred, her voice dripping with menace. “Did you truly believe you could control me? Dominate me? Foolish.” Her horn sparked with dark magic, the air growing thick with tension.

Celestia took a step back, her confidence wavering. “Luna, wait-”

Nightmare Moon’s eyes narrowed, cutting off Celestia’s words. “Luna is gone,” she snarled, her voice like ice. “You wanted to play, Celestia? You wanted to remind me of my place? Now you’ll see what it truly means to face the night.”

In an instant, her magic flared, and Celestia was lifted from the ground, her limbs bound by invisible tendrils of shadow. She struggled, her wings flapping wildly, but Nightmare Moon’s power held her firm, pressing her down onto the cold marble floor. “You’ve always liked to control, haven’t you, Celestia?” Nightmare Moon mocked, her gaze sharp and unforgiving. “Always the ruler. Always the one on top.”

Celestia grunted, straining against the dark magic that held her, her prideful expression slipping into something more desperate. “Luna - Nightmare, stop this!” she demanded, her voice cracking with both anger and fear.

But Nightmare Moon only smiled wider, a cruel, twisted grin that sent a chill through Celestia’s body. “Oh, no, sister. I won’t stop. You started this, remember? Now it’s my turn.”

She stalked forward, her armored hooves clanging against the stone as she circled Celestia like a predator toying with its prey. Her horn glowed ominously, and with a flick of magic, Celestia’s regal golden armor was torn away, leaving her exposed and vulnerable beneath Nightmare Moon’s gaze.

Celestia gasped, her cheeks flushing with a mix of shame and defiance. “You don’t want to do this,” she said, but her voice lacked conviction.

Nightmare Moon lowered her head, her muzzle brushing against Celestia’s neck, her breath hot and teasing. “But I do, sister,” she whispered, her fangs grazing Celestia’s skin, making her shudder. “You always think you can control me... own me. But tonight, you will see who truly holds the power.”

With a surge of magic, Nightmare Moon forced Celestia onto her back, pinning her down with her hooves as she loomed above her, dark and terrible. Her slit-pupil eyes glowed with lust and malice as she pressed her body down onto her sister’s, her form sleek and powerful, completely in control.

Celestia’s breath came in ragged pants as she lay beneath her, her once-proud expression now replaced with something far more vulnerable. She looked up at Nightmare Moon, her eyes wide, filled with a mix of fear and something else - something she didn’t dare admit to herself.

Nightmare Moon’s grin grew darker as she saw the flicker of submission in Celestia’s eyes. “Yes,” she hissed, leaning in closer, her lips brushing against Celestia’s ear. “You’re mine now, Celestia. Just like I’ve always been yours.”

Her magic pulsed again, and Celestia moaned, her body betraying her as Nightmare Moon’s power invaded every inch of her being, binding her, claiming her. “Submit to me,” Nightmare Moon whispered, her voice a low, commanding growl. “Submit to the night.”

Celestia gasped, her body trembling as Nightmare Moon’s magic slid across her skin, dark and intoxicating. She couldn’t fight it - not anymore. Not with the way her body responded, the way her magic flickered weakly, overwhelmed by the raw power of the night.

Nightmare Moon’s hoof traced down Celestia’s chest, slow and deliberate, teasing her, making her squirm. “Tell me, sister,” she purred, her voice thick with amusement. “How does it feel to be powerless? To be at my mercy?”

Celestia’s eyes fluttered shut as a soft whimper escaped her lips. She didn’t answer, couldn’t answer. All she could do was tremble beneath Nightmare Moon’s touch, the darkness closing in around her, consuming her.

Nightmare Moon leaned down, her mouth hovering just above Celestia’s. “You will beg for me,” she whispered, her breath hot and sweet. “Just as I once begged for you.”

Celestia’s breath hitched, her body arching as Nightmare Moon’s magic wrapped tighter around her, pulling her deeper into the night’s embrace.

Nightmare Moon hovered above her, her dark form casting an imposing shadow over Celestia’s trembling body. The night felt alive, thick with magic, the air buzzing with an electricity that seemed to make Celestia’s skin tingle. She had never seen her sister like this - not since the ancient days of their war. But this wasn’t just the Nightmare seeking control over Equestria. This was something far more intimate, more personal.

Celestia’s chest rose and fell in shallow breaths as Nightmare Moon’s hooves pressed down on her, pinning her beneath the weight of her own weakness. Her wings, usually majestic and proud, were spread helplessly against the cold stone floor, her body exposed, stripped of the golden armor that had always marked her as untouchable.

But tonight, that armor was gone. And so was the illusion of power.

“You look so fragile, sister,” Nightmare Moon purred, her voice a velvety taunt that made Celestia’s stomach twist. Her muzzle brushed over Celestia’s cheek, her fangs grazing the sensitive skin of her throat, threatening but never quite biting down. “For all your strength, for all your light… when the night comes, you are just as weak as the rest.”

Celestia's eyes fluttered open, her voice trembling with a defiance that was quickly crumbling. “You think this will make me submit to you, Luna?” she gasped, her voice catching in her throat as Nightmare Moon’s magic pulsed through her, binding her tighter. “I am the sun. I will never-”

“Silence.” Nightmare Moon’s voice cut through the air like a blade, her horn flaring with dark energy as she pressed her hoof against Celestia’s lips, silencing her instantly. “Do not speak as if you hold the power here. You are nothing but a slave to the darkness now, Celestia. The night is all-consuming. It will swallow you whole.”

Her magic tightened around Celestia’s body, forcing her back to the floor, pressing her into submission. Celestia’s wings twitched beneath her, her body writhing against the magic, but there was no escape. Nightmare Moon’s grip was unrelenting, her dominance absolute.

A low, guttural moan escaped Celestia’s lips as she felt the tendrils of dark magic coiling around her body, teasing her skin, sliding beneath her fur with an almost sinful intimacy. She could feel Nightmare Moon’s power seeping into her, twisting her own magic, corrupting it with every pulse.

"You feel it now, don’t you?" Nightmare Moon whispered, her lips brushing against Celestia’s ear as she spoke, her voice thick with desire. "The darkness. It’s inside you, Celestia. And it will consume you, no matter how hard you fight."

Celestia clenched her teeth, trying to resist, trying to push back, but her body betrayed her, arching beneath Nightmare Moon’s touch. Her own magic flickered weakly, a pale imitation of the power she once wielded, now overwhelmed by the raw, primal force of the night.

“You’ve always been so proud,” Nightmare Moon continued, her voice a soft, dangerous purr. “So untouchable. But look at you now, sister. Look how easily you break when the light is gone.”

With a sharp, deliberate movement, Nightmare Moon’s hoof trailed down Celestia’s body, lingering over her chest, her belly, before sliding lower, teasing the sensitive spot between her legs. Celestia gasped, her body jerking at the sudden touch, her legs trembling as she tried to resist the wave of heat building inside her. But Nightmare Moon’s magic held her fast, her hooves immobile, her wings splayed uselessly against the stone.

“Tell me, Celestia,” Nightmare Moon whispered, her voice dripping with malice. “How does it feel? How does it feel to be completely at my mercy?”

Celestia’s breath came in ragged gasps, her mind spinning as her body betrayed her with every touch, every pulse of dark magic that slid across her skin. “Luna… please…” she whispered, her voice barely audible, her strength failing her.

But Nightmare Moon only laughed, a deep, throaty sound that sent a shiver through Celestia’s body. “Luna is gone,” she growled, her eyes gleaming with a dark hunger. “And you are mine.”

With a sudden surge of magic, Nightmare Moon’s hoof pressed harder against Celestia’s slit, eliciting a sharp cry from the sun princess as her body arched off the ground, her wings trembling with the effort to hold herself back. But there was no holding back anymore. Nightmare Moon’s magic wrapped around her, tight and unyielding, pulling her deeper into the abyss.

“You will beg,” Nightmare Moon hissed, her lips brushing against Celestia’s, her fangs grazing her bottom lip. “You will beg for me, sister. Beg for the night.”

Celestia’s eyes fluttered closed, her body trembling as she felt the overwhelming power of the night pressing down on her, filling her, consuming her. She tried to resist, tried to hold on to the last vestiges of her pride, but it was slipping away, dissolving in the face of Nightmare Moon’s relentless dominance.

Her lips parted, her voice a trembling whisper. “Please…”

Nightmare Moon’s grin widened, her eyes dark with triumph. “Say it,” she commanded, her hoof moving faster, her magic pulsing harder. “Beg for the night.”

Celestia’s breath hitched, her body writhing beneath Nightmare Moon as she felt herself teetering on the edge of something vast and terrible. “Please, Nightmare…” she gasped, her voice breaking as her body surrendered to the pleasure, to the darkness. “Please… take me…”

And in that moment, Celestia’s last shred of resistance crumbled, her mind slipping into the void as the night claimed her fully. Nightmare Moon’s laughter echoed through the night, rich and victorious, as she bent down, her lips capturing Celestia’s in a kiss that was both savage and possessive, sealing her sister’s submission.

The night had won.

* * *

Nightmare Moon’s lips remained pressed against Celestia’s, the kiss raw, primal, as if sealing a pact that had been forged long ago in the hidden recesses of their minds. Celestia, once the proud ruler of the sun, was now a trembling, panting mess beneath her sister’s dark magic. The night had stripped her bare, both physically and emotionally, leaving her vulnerable in a way she had never been before.

Nightmare Moon pulled back, her fanged grin gleaming in the moonlight, eyes locked on Celestia’s flushed face. "Look at you now," she purred, her voice dripping with satisfaction. "The mighty ruler of Equestria, broken under my hoof. Tell me, sister - does this feel like the light’s victory? Or have you finally realized that the night... always wins?"

Celestia lay beneath her, her chest rising and falling rapidly as she struggled to catch her breath. She tried to speak, but her voice failed her, coming out as a soft, strangled moan. Her wings fluttered helplessly against the stone floor, every inch of her body burning with a desperate need she couldn’t suppress. The power of the night had overwhelmed her, filling every corner of her being with its dark, intoxicating touch.

Nightmare Moon leaned down again, her muzzle brushing against Celestia’s ear, her breath hot and teasing. "I can feel your fear," she whispered, her voice a low growl that sent a shiver through Celestia’s body. "And your desire. Do not pretend, Celestia. Do not lie to yourself. You’ve wanted this for a long time, haven’t you?"

Celestia’s eyes fluttered open, her breath coming in short gasps as she gazed up at her sister. Her pride screamed at her to deny it, to fight back, to reclaim some semblance of control - but her body wouldn’t listen. It ached for Nightmare Moon’s touch, craved the darkness that was now her world.

“Answer me,” Nightmare Moon commanded, her voice hard and dangerous, her hoof slipping lower again, brushing against the slick heat between Celestia’s legs. “Or I will leave you like this, trapped in your own desire, desperate and unsatisfied.”

Celestia’s lips parted, her voice trembling as she whispered, “I... I want you.”

Nightmare Moon’s smile widened, her eyes gleaming with dark triumph. "Good," she purred, her hoof pressing harder against Celestia’s slit, rubbing slow, deliberate circles that made the sun princess gasp. "Now you finally understand. You belong to the night, Celestia. You belong... to me."

With that, Nightmare Moon’s magic surged again, wrapping around Celestia’s body like a vice, pulling her deeper into the abyss of pleasure. Celestia moaned, her body arching off the ground as she felt her sister’s power coursing through her, overwhelming every sense, every thought. She was lost in it now - there was no escaping the night’s grasp.

Nightmare Moon leaned down, her lips grazing Celestia’s neck, biting down gently, just enough to leave a mark. Celestia whimpered beneath her, her body trembling as the bite sent a jolt of pleasure straight to her core. Nightmare Moon’s laughter was soft, dark, as she moved lower, her fangs brushing against Celestia’s skin, teasing her, torturing her.

"You’re mine now, sister," Nightmare Moon whispered, her voice thick with desire. "You will never escape the night. Not now. Not ever."

Celestia’s breath hitched, her body quaking with every touch, every word. She could feel herself slipping further, her mind unraveling under the weight of the darkness, the pleasure consuming her. There was no resistance left. She had given herself to the night, to her sister, and there was no turning back.

Nightmare Moon’s magic flared again, a wave of energy that crashed over Celestia’s body, sending her spiraling into ecstasy. Her wings fluttered wildly, her legs trembling as she came undone beneath her sister’s touch, her cries of pleasure echoing across the empty balcony. She had never felt anything like it before - this raw, unfiltered power, this complete surrender.

As Celestia’s body quaked with the force of her orgasm, Nightmare Moon’s grin only widened. She watched, satisfied, as her sister writhed beneath her, completely and utterly at her mercy. "Yes," she purred, her voice dripping with satisfaction. "You see now, don’t you? The power of the night is absolute. And now... so am I."

Celestia lay there, panting, her body spent, trembling from the intensity of it all. She looked up at her sister, her eyes wide, dazed, as the reality of her submission settled over her like a shroud. She had been conquered - broken.

And yet, somewhere deep within, she couldn’t deny the satisfaction that came with it.

* * *

Nightmare Moon’s triumphant grin softened as she gazed down at her trembling sister, her own breath coming in ragged pants as the heat of their lust still pulsed between them. The cool night air pressed against their slick bodies, but the warmth of their shared moment kept the cold at bay. Celestia lay spent beneath her, her chest rising and falling rapidly, her face flushed, her wings twitching slightly with the lingering tension of release.

But Nightmare Moon wasn’t finished yet. The night was still young, after all.

Slowly, deliberately, she lowered herself down, her body sliding against Celestia’s in a languid, teasing movement that made the sun princess moan softly. Nightmare Moon’s fanged smile returned, but this time it was filled with dark affection rather than malice. She could feel the trembling anticipation in Celestia’s body, the unspoken need that still lingered despite the overwhelming climax she’d just endured.

"I can still smell your desire, sister…" Nightmare Moon whispered, her lips brushing against Celestia’s ear, sending a shiver down her spine. "I can feel it. The hunger. You want more, don’t you?"

Celestia’s eyes fluttered open, her gaze heavy-lidded and dazed with lust. She was too exhausted to answer, but the soft whimper that escaped her lips spoke volumes. Her body, despite its weariness, responded instinctively to Nightmare Moon’s touch, arching slightly, inviting more.

Nightmare Moon chuckled softly, her horn glowing as her magic enveloped them both in a cocoon of darkness. "Good," she purred. "Because I’m far from done with you, dear Celestia."

With a slow, deliberate motion, Nightmare Moon lowered her head, her muzzle trailing down Celestia’s body, leaving a trail of hot, wet kisses in her wake. Celestia’s breath hitched as Nightmare Moon’s lips brushed against the sensitive skin of her chest, her belly, her thighs. The anticipation built again, a slow burn of desire that reignited the fire that had only just begun to dim.

Nightmare Moon’s tongue flicked out, teasing the slick folds between Celestia’s legs, drawing a sharp gasp from the sun princess. Celestia’s hips bucked slightly, her body instinctively seeking more of that delicious touch. Nightmare Moon grinned against her, her fangs grazing Celestia’s inner thigh as she continued her slow, torturous descent.

"Such a good big sister," Nightmare Moon whispered, her voice a low, sultry growl. "So eager to be taken. So eager to be filled with the night."

Celestia moaned softly, her hooves weakly tracing the stone floor as Nightmare Moon’s tongue dipped lower, swirling over her clit with slow, teasing strokes. The sun princess’s body arched again, her breath coming in short, desperate gasps as the pleasure built, wave after wave, threatening to overwhelm her all over again.

Nightmare Moon’s magic pulsed, wrapping around Celestia’s body, amplifying every sensation, every touch. Her tongue moved with deliberate slowness, flicking and teasing, keeping Celestia on the edge but never quite letting her fall over it. She wanted to draw this out, to savor the sight of her proud sister reduced to a moaning, quivering mess beneath her.

"Do you want to come, Celestia?" Nightmare Moon asked, her voice dripping with dark amusement as she looked up at her sister’s flushed face. "Do you want to be completely consumed by the night?"

Celestia’s head lolled to the side, her eyes half-lidded with pleasure, her body writhing beneath Nightmare Moon’s touch. "Y-yes," she gasped, her voice barely more than a breathless whisper. "Please... please..."

Nightmare Moon grinned, satisfied. "Then beg for it, sister," she purred, her tongue flicking over Celestia’s clit again, making the sun princess’s body jerk in response. "Beg for the night to take you."

Celestia’s breath came in ragged pants, her mind spinning, lost in the haze of pleasure and darkness. "Please," she whispered, her voice trembling. "Please... take me... make me yours..."

With a dark, triumphant laugh, Nightmare Moon obliged, her tongue working faster now, her magic pulsing in time with every flick and stroke. Celestia’s moans grew louder, more desperate, her body trembling with the force of the pleasure building inside her. She was so close - so close to falling over the edge once again, and this time, she wanted it. She needed it.

Nightmare Moon’s magic surged, wrapping tighter around Celestia’s body, pulling her deeper into the abyss of pleasure. And with one final, skillful stroke of her tongue, Celestia came, her body convulsing beneath her sister’s touch as the orgasm tore through her, leaving her breathless and trembling. Her wings fluttered weakly, her legs shaking as wave after wave of ecstasy crashed over her.

Nightmare Moon didn’t stop. She kept licking, kept teasing, drawing out every last bit of pleasure until Celestia was left a panting, quivering mess on the floor of the balcony, her body spent, her mind blissfully blank.

Finally, after what felt like an eternity, Nightmare Moon pulled back, her lips slick with Celestia’s essence, her eyes gleaming with dark satisfaction. She stood over her sister, triumphant, her chest rising and falling as she caught her own breath, her body thrumming with the same satisfaction that now filled Celestia.

Leaning down, Nightmare Moon placed one final, lingering kiss on Celestia’s lips, her fangs grazing her sister’s bottom lip as she pulled away, her eyes dark and full of promises yet to be fulfilled.

"Now," Nightmare Moon whispered, her voice soft and commanding, "you are mine, Celestia. The night has claimed you... and you will never forget it."

Celestia lay there, her chest heaving, her eyes half-closed as she gazed up at her sister. For the first time, she didn’t fight back. She didn’t resist. She simply nodded; her body too weak, too satisfied to do anything else.

Nightmare Moon smiled down at her, a dark, satisfied smile, before she turned away, her wings flaring as she stepped toward the edge of the balcony, her mane swirling in the wind like a storm. The night was hers, and now, so was Celestia.

And for the first time in her long life, Luna didn’t feel alone.

* * *

The night was silent save for the sound of Celestia’s labored breathing as she lay sprawled on the cold stone balcony, her body still trembling from the overwhelming intensity of what had just transpired. The moon hung high in the sky, casting a pale light over the scene, illuminating the slick sheen of sweat that glistened on her fur.

And then, in the stillness, there was a soft knock at the door.

A young servant pony entered cautiously, carrying a small silver tray piled high with Nightmare Night candy. He hesitated for a moment as he took in the scene before him - the Princess of the Night, still towering in her Nightmare Moon form, standing over the prone form of Celestia, who was too dazed and spent to even acknowledge him. Swallowing nervously, the servant cleared his throat.

"Your... your Highness?" he stammered, addressing Luna, "I brought the treats you requested."

For a long, tense moment, Nightmare Moon didn’t respond. Her glowing eyes remained fixed on Celestia, her expression unreadable. Then, without warning, her entire demeanor shifted. The dark aura that had enveloped her flickered, and with a soft, almost playful giggle, the towering figure of Nightmare Moon seemed to shrink - the swirling cosmic darkness receding, her eyes softening from the fierce predatory glow into the familiar, gentle gaze of Princess Luna.

“Oh!” Luna gasped, clapping her hooves together in foal-like delight as she glanced at the tray. "My snacks!" she chirped, her voice now light and innocent, completely at odds with the raw, domineering presence she’d exuded moments earlier.

The servant blinked, confused, but Luna wasted no time, her horn glowing softly as she levitated the tray towards her. She sat down beside Celestia, cross-legged on the stone floor, and began happily munching on the colorful sweets, humming softly to herself as if nothing strange had just happened. She popped a candy into her mouth, the sugary treat making her grin with childish joy.

Celestia, still lying on the ground, blinked in disbelief. She turned her head to stare at her sister, her brow furrowed in confusion. “L-Luna?” she asked, her voice hoarse and breathless, her mind struggling to process the sudden shift. “What... what’s going on? You were... you were Nightmare Moon a moment ago...”

Luna looked up from her candy, her cheeks puffed out as she chewed. She swallowed, then gave Celestia a cheerful, almost innocent smile. “Oh, that?” she said casually, as if the dark, intense scene that had just played out was no more than a passing thought. “That wasn’t really Nightmare Moon, sister. The Elements of Harmony banished her for good, remember?”

Celestia’s confusion deepened. She slowly pushed herself up onto her elbows, still feeling the weight of her exhaustion. “But... then what was all that?” she asked, her voice still shaky.

Luna giggled again, clearly amused by her sister’s confusion. “It’s just a costume, Tia! I can wear the aura of Nightmare Moon like a mask, just for fun, you know, for Nightmare Night! It’s my holiday after all.” She winked playfully, biting down on another piece of candy. “You looked like you were really into it too.”

Celestia’s mouth opened and closed in stunned silence, trying to comprehend what her sister was saying. "A... costume?"

Luna nodded enthusiastically, her tail swishing with excitement as she continued nibbling on her sweets. “Mhm! After all, what better way to celebrate Nightmare Night than by embracing the legend? I can still use a bit of her power, wear the dark persona like a cloak. It’s so much fun scaring the ponies in the town square! You should try it sometime.” She gave Celestia a mischievous grin, licking some sugar off her hoof. “Though, I think I may have overdone it this time.”

Celestia stared at her, still struggling to piece together the wild shift in tone. “Luna,” she said slowly, her voice filled with disbelief, “you... you nearly made me beg for my life. And now you're eating candy?”

Luna tilted her head, as if genuinely surprised by her sister’s bewilderment. “Oh, Tia, you know it was all in good fun! Nightmare Night is the one time of the year where I get to be a little... naughty,” she said with a sly smile. “And besides, I couldn’t let you have all the fun, could I?”

Celestia’s jaw hung slightly open, her mind still reeling from the sheer absurdity of the situation. She had been utterly dominated by her sister in the guise of Nightmare Moon, only for Luna to revert back to her usual playful self within seconds, as if nothing had happened. She couldn’t decide whether to feel relieved, exasperated, or just plain baffled.

But as she watched Luna happily munch on her Nightmare Night candy, a soft, incredulous laugh escaped her lips. “Luna,” she sighed, shaking her head slowly, “you never cease to amaze me.”

Luna grinned widely, her eyes twinkling with mischief. “I do my best,” she said around a mouthful of candy, offering the tray to Celestia. “Candy?”

Celestia stared at the tray for a moment, then let out a deep, tired sigh. "Why not?" She reached for a piece of candy, her body still aching, but a small smile tugged at the corner of her lips.

Nightmare Night had always been Luna’s night. This time, it was a night neither of them would soon forget.

* * *

Author's Note

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