Forbidden Desires

by 999999

Rating: mature
Tags: My Little Pony: Friendship is Magic, Romance, Princess Luna, Princess Celestia, Sex
Length: 3361

Old, hidden desires come into the open during the innocent conversation. It quickly turns into a hot night.

Celestia kept her secret hidden from Luna for longer than she wants to remember. But one night during the innocent conversation, the real feelings for her sister come out.

Luna has a confession to make, too.

Thanks to Anonymous Editor for help <3

Picture by Stradivarius

Published 2016-05-18 03:50:01 UTC
Last updated 2016-05-18 03:50:01 UTC

Forbidden Desires

On the balcony of her room, Celestia stared silently at the dark, cloudless sky, her eyes locked firmly on the full moon suspended high above the ground. She sighed and hung her head.

Luna quietly approached her sister. "What is it, sister?" she asked in a worried tone, startling Celestia.

"Nothing."

"Nothing?" Luna repeated the answer. "Thou hath stared at the moon for hours now, sister, and thou saidst nothing is wrong?"

"Nothing is wrong, Luna… It had become a habit when you were banished there. Every year, I would spend an entire night looking at the moon, hoping for your return."

Luna chuckled softly. "Is that what thou worry about, sister?" She paused for a moment, turning her head towards the moon herself. "I hath been here for a number of years now. Just in case thou hadn't noticed…"

Celestia turned. Only inches away from her stood a dark figure, patiently waiting for a reply. Luna’s horn glowed softly, illuminating her facial features. Her cheerful smile was accompanied with a glimmer of sadness in her eyes, eliciting a bitter smile from Celestia.

"Yes," Celestia breathed after a long pause. "It's just…" She sighed. "A thousand years without a sister you loved and cared for… A sister you entrusted your life to…"

"That pony never left, sister." Luna leaned her muzzle onto Celestia. "Even as Nightmare Moon, I hath retained my love for thee. Thou hast been the shining star in my heart, but she had become too strong for me. I am sorry if she had hurt thee, but… I-I had no choice."

"Luna…"

"But she is gone forever. She can hurt nopony anymore; I hath said this many times and have no choice but to repeat myself."

Celestia sighed. "I wish it had never came to that. Sometimes I wonder if…"

"Wonder what?"

Celestia lowered her head. "I am unsure of that myself. What would happen if I hadn't… Ow."

"Ow?"

Celestia unmounted her front hooves from the high rail. "That pose was really uncomfortable. I think I strained a muscle and might need to rest for a little while."

Luna giggled. "I think thou needst a tad more."

"What do you have in mind?"

Instead of replying, a mischievous grin crossed Luna’s face. Her horn flicked and Celestia's wings shot open.

"Ow, ow ow ow!"

"Tense," Luna finally said. "Worry not, sister of mine. I hath not forgotten how to do this…"

"Not tense. Just… not so hard. You could pull my wings out."

"S-sorry… I wanted to… I— I'm sorry, sister. I shouldn't—" Luna hung her head, letting her voice trail off together with the glow of her horn. "I guess I indeed hath forgotten. I remember doing this to each other as foals, but… in a thousand years, it seems I hath lost the touch. I should know better than try to give thee a massage with my magic."

"So that's what it was?" Celestia asked with a smile. "I thought you wanted to take my wings as a souvenir."

Luna quickly looked up in horror. "W-what? I would never—"

"I'm kidding, Luna."

A faint spark glimmered in Celestia's eye. She smirked, her horn flared up, and a faint, golden glow illuminated the room.

Before Luna could open her mouth, she felt a slight pressure right between her wings, making them shoot up uncontrollably.

Celestia couldn't help but giggle. "Now who's tense?"

Luna groaned. "Thou art evil."

"I am the worst pony ever," Celestia mused. "For trying to make my little sister feel like she hadn't swallowed a broom."

"A… broom?"

"It's an expression, Luna." Her tone softened. "Sometimes, I tend to forget how long you were away… I spent so much time worrying and wondering if the pony that the stars would eventually bring back would still be you…"

"I assure thee, sister, it's— l-lower… no, just a little bit higher, n-yes, that's the spot!" Luna breathed happily as the disembodied pressure of magic passed the lower part of her back and focused on caressing a single spot. She stretched slightly, giving into the gentle, magical massage, and lay on the thick carpet, her legs and wings spread.

While her magic was massaging her sister's back, Celestia quietly took off her golden slippers and carefully set them aside. The tip of her forehoof lightly traced the path of her magic, adding more pressure on each pass.

Luna moaned from sheer delight as the white hoof pushed flat against her back. Magic is nothing compared to a bare hoof, she thought. She moaned again when the hoof moved lower down her waist.

"If I didn't know better, I'd say you're enjoying this, Luna," Celestia mused.

"Mmmmm… mhm."

Celestia smiled. She swore she could watch this scene forever and never get bored of it. The slightly spread legs, the familiar flanks, accompanied with the faint, yet unmistakable scent of Luna's arousal. Celestia couldn't help herself but to take in her sister's warm, teasing fragrance.

"Sister? Are thee done?"

"Yes!" Celestia jolted up and cleared her throat to gather her thoughts. "I mean, yes, Luna. I'm done. How was it?"

"Most wonderful. But a plea, mayhaps?"

"Yes?"

Luna turned, her stomach now facing Celestia. "Could thou do the same on the other side?"

Celestia paused for a moment, the light from her horn lighting up a part of her sister's body that was usually kept hidden from others. She couldn't help herself but to let her gaze sneak between Luna's hind legs, catching a glimpse of the dark-blue glistening vulva and a few droplets of Luna's juices that sparkled beneath.

Even though it was the middle of the night, Celestia could swear the temperature in the room had risen a few degrees and ended up nesting deep inside of her. Her mind and her fantasies shifted into overdrive as she nodded firm confirmation. As much as she wanted to give into the temptation, she was content that all of her problems would be solved when she was alone, letting her mind fully give into her fantasies while the tool of choice would work its way to relieve the delightful pressure and heat that was starting to build inside of her.

Her hooves pushed against the warm body of her sister again, making Luna moan again. However, this moan sounded different from the earlier ones. Aside of the happy grunt she heard when she was playing with Luna's wings, there was now a faint, sultry undertone in her sister's voice.

And as Celestia continued, Luna started to pant heavily. "Lower," she said faintly when she felt Celestia's hooves dragging along the bottom of her stomach.

"Lo… wer?"

Luna nodded. Her hind legs spread slightly, seemingly inviting her sister to expand her explorations. It was like Luna had read Celestia's mind, but Celestia knew full well that wasn’t true. If it were, the last thing Luna would want was to allow access to her private parts, right?

She doesn't know, Celestia thought to herself. And maybe it's better that way. It's just a shame I only get to see her like this every so often.

"Sister?" Luna asked, startling Celestia from her reverie.

"Sorry, Luna. I got lost in my thoughts," Celestia replied after a brief moment. She smirked. "If I didn't know any better, I'd say your visits to the royal kitchen are becoming more and more frequent."

Luna groaned. "I'm not fat!"

Celestia giggled. "Of course not. You're… what's the word? Well-rounded?"

"Not fat," Luna replied flatly.

Another smirk later, Celestia resumed kneading Luna's stomach and its surroundings, slowly and subtly getting even lower. It didn't take long until her hoof reached the rims of a plump, dark-blue vulva, now clearly soaked with juices that she dared not taste. Instead, she closed her eyes and inhaled Luna's aroma.

In a moment where she couldn't determine if it was carelessness or her subconsciousness acting up on its own, Celestia's hoof passed Luna's slippery crevice and hit an equally-damp clit. When Celestia realized what had happened, the shivers of delight already shook Luna's entire body.

"Er… sorry, Luna," Celestia said in a raspy voice, her face flushed deeply red. "D-do you want me to continue?"

Luna nodded, and Celestia's hooves returned to her sister. Lost in thought with Luna's reaction and the pleasure it generated for both of them, Celestia continued to rub Luna's stomach.

"Lower," Luna breathed from time to time, and Celestia was happy to oblige. Until—

"Lower," Luna repeated herself. But instead of doing so, Celestia stopped with what she was doing. Her hooves were already dangerously close to the seemingly inviting crevice. As much as she wanted to oblige, she was afraid of doing the same mistake again.

"Luna?" Celestia asked weakly.

Luna smiled softly, a glimmer of mischief in her eyes. "'Tis what thou wants, is it not?"

Celestia's heart grinded to a halt. "W-what?"

"Sister, mayhaps thou hath forgotten I am the Princess of the Night?" Luna asked, her tone like an innocent inquiry. "I hath seen thy dreams thou hath of me."

In a moment, the room was drowned in grave and painful silence. The glow of Celestia's horn dimmed down, and even so, Celestia could swear that Luna could still clearly see the red in her face. At least with her horn ceasing to emit the golden light, the tempting folds had been hidden from her sight, even though the faint, but treacherous scent of Luna's arousal lingered in the air and teased her nostrils.

"Sister?"

"I… I don't know what to say, Luna," Celestia finally muttered.

"'Tis true, then? 'Cause the dreams I hath seen felt not of sheer lust, or at least most were like that. Some others, however…"

"Luna…" Celestia sighed, her voice cracking. "I didn't know how to tell you, so I thought it would be better to say nothing at all. I let myself think that the dreams and fantasies would never be anything but.

"And tonight… I rather forget any of this happened. I know now this is nothing but a tease."

"Mayhaps, dear sister," Luna replied with a smirk. "When I saw thy dream of me for the first time, I hath been shocked, appalled even. My own sister hath been thinking of me like that? No way this could be true.

"'Twas weird, but as I hath seen, thou desireth more than just sex, but a companion for long. I hath visited thy dreams many times after, and all of them were nothing short of enjoyable.

"'Tis strange, though. I hath never expected romantic affection from a sister of mine, and even less so… Even less so… I hath expected to feel the same."

"Luna…"

Celestia fell silent as the dark-blue muzzle covered her own, a muzzle she longed for longer she even dared to count. In the heat of the moment, her hooves embraced Luna's neck and pulled her closer to herself. The warmth of her sister engulfed her and pushed Celestia against the ground, effectively pinning her down.

"Mmmmm," Luna breathed with a smile as their muzzles parted for a few moments. Her eyes gazed deeply into her sister's pink counterpart. A faint smile and a nudge from Celestia made her realize how much she wanted this, and a hungry wink between her hind legs agreed. She needed this.

A few seconds later, she eagerly licked Celestia's lips for permission to explore the insides of her mouth, but the moment she did so, she could feel her tongue being clamped by warm and juicy lips. She could feel the tip of Celestia's tongue teasing her own before suckling on it for a little, letting Luna explore the inside of her mouth, and she happily returned the favor.

After what seemed to be forever, their kiss broke, and the two ponies gazed into each other's eyes again, both hungry and needy for more. Celestia knew exactly what her younger sister wanted. She lit her horn, and in a split second, their positions were reversed; Luna now lying on the thick carpet, while Celestia was on top.

Just like before, Celestia's hoof glided down her sister's chest, but this time, there was no need to hide her affection anymore. She quickly went between Luna's hind legs, and instead of just brushing against the crevice like the last time, the tip of her hoof traced between the wet folds, caressing the slightly-opened lips and earning her a stifled moan from Luna.

"You're wet," Celestia announced with a triumphant grin.

"Pray tell, sister, are you going to do some—" The rest of Luna's words were lost to another moan as Celestia passed over Luna's crevice again, the tip of her hoof dipping even deeper between Luna's folds and wiggling around ever so slightly. "Ohhhhh—"

Celestia's wet hoof removed itself from Luna's nethers and pressed against Luna's muzzle. She grinned as Luna eagerly licked her own juices, and when her hoof was thoroughly cleaned, she pressed her lips against Luna’s.

"You taste wonderful, Luna," Celestia breathed when the muzzles parted. "Even better than I imagined." She leaned in again and stole another kiss. "Much better."

Luna blushed deeply, her cheeks turning all shades of red that she knew of, and even some that she didn't. Celestia was right; Luna adored her own taste as well. The countless nights when her only companion was her own hoof, she often aroused herself, allowing the liquids to build up, and she happily licked away every single drop she could gather from her hoof. And after she couldn't control herself anymore, she would bite her lower lip and let her own hoof guide her to divine ecstasy.

"Let me go first, Lu," Celestia breathed hotly. "I've been dying to taste you and see you squirm beneath me for a very long time now."

With a subtle nod from Luna, Celestia dove between her sister's hind legs and paused for a moment. She was mesmerised by a droplet of liquid that glimmered in the glow of her horn as it exited Luna's wet folds and landed on her ethereal tail.

Without further hesitation, Celestia gave in to her sister's intoxicating aroma. She was thirsty for her sister's juices and was proverbially dying to knead the tiny, pink organ between her lips. And yet, despite how wet Luna already was and how eager Celestia was to dive between Luna's oozing folds and lap the delicious nectar directly from the source, the building pleasure would have to wait.

Celestia had no intention of rushing her own endeavours. She nuzzled and kissed the bottom of the familiar dark-blue hoof, while her own hooves caressed the dark flanks, moving slowly toward the inner thighs.

"Tia," Luna breathed. "Want thee…"

As a response, Celestia grinned. Luna called her foalhood name in the most erotic way she could imagine. It was what she had hoped for all this time, and for it, she decided to give Luna what she desperately needed.

She kissed the lips of her sister's labia. "I know," Celestia replied happily. "I want you too. Wanted you for hundreds of years… And tonight…"

Even though she had been with a couple of mares since she banished her sister to the moon, none of them could compare to what lay in front of her. She could swear there was nopony that was as attractive as Luna was there and then. A dark-blue body splayed in front of her with a strong, silk-like hoof leaning against her neck, inviting her to explore her intimate parts. She could feel the subtle twitches of her sister's anticipation, urging her to do what she had been planning. The sheer thought of what she was about to do, excited her, encouraged her, turned her on even more. She couldn't wait any longer.

Luna stifled a moan as Celestia's tongue scraped against her pink folds. Her back arched up as the invading muscle pushed against her crevice, looking for the source of the thick, divine juices.

"Ohhh…"

Celestia's ear flicked, but she didn't allow herself to be be distracted by Luna's soft moans or gasps for air - a small bud, an invaluable prize for her that was now sticking from the leaking crevice, was far more interesting. She kissed it lightly before kneading it gently between her upper and lower lips, making Luna's body shift erratically. She spread Luna's legs a bit further, enough to dampen the movements and allowing herself easier access to Luna's nethers.

In a few seconds, Celestia dipped her muzzle between Luna's folds again, her tongue teasing the thick, pink bud, occasionally dipping it between the folds to lap up the juices that formed anew.

"Tia…" Luna breathed, her voice on the brink of cracking.

Celestia sensed Luna was on the very edge of her breaking point. She took one last lick across the delicious crevice before she leaned forward and pressed her muzzle against Luna's, taking a moment in between to take a nip at an erect nipple in the process.

The moment their muzzles touched, Luna hungrily and lustfully embraced Celestia tightly, desperately needing her sister’s warmth, and pulled her even closer while Celestia continued her relentless stimulus on Luna’s nethers with the tip of her hoof.

Suddenly, their kissing game came to a halt. Luna winced, and her embrace became even tighter as their muzzles proverbially melted into each other. She let out a loud gasp of relief, followed by the orgasmic discharge that ravaged through every fiber of her body. And another one followed quickly after. And another.

As Luna's pressure eventually dimmed down and her contractions subsided, Celestia broke their kiss and smiled, offering her wet hoof to Luna. Without much hesitation, Luna kissed it and licked off her own juices.

"Lu?" Celestia whispered.

"Hm?" Luna smiled back and kissed the white hoof again. "Strange… I hath not felt anything like that before. Usually they're much weaker… 'T was as strong as my very first one if not stronger."

Celestia smirked and kissed Luna again on her lips and on her dark-blue chest.

"Tia."

"This is one of the rare times I'll actually enjoy cleaning after my younger sister."

"Tia…"

"I'll be gentle, Lu."

Just as she finished that sentence, Celestia latched to Luna's crevice and eagerly started to lap away the juices that were oozing out of it.

Even with being as careful as she was, Celestia's tongue and its rhythmic workout in and out of Luna's slippery organ soon pushed Luna over the edge once again. As her body shook again, she had no other choice but to bite her hoof to stifle another cry of ecstasy.

"T-Tia, s-stop," Luna muttered between gasps.

Celestia obeyed. She raised her head from between the dark-blue legs and listened, her glistening muzzle expressing genuine worry. "Luna? Is there something wrong?"

"N-no. J-just too much," Luna whispered back. She closed her eyes. Her exhausted and erratic breathing calming with every breath, shortly turning into a rhythmic and soothing endeavor.

"Luna?"

No response.

"Lu?"

Again, Celestia's inquiry yielded no response other that a set of soft snores that were, along with the strong scent of their recent act, now permeating through the silence of the vast room. She sat still for a few moments, seemingly taking in the scenery. She couldn't help but giggle as she caught a glimpse of a wink from the dark, slippery organ, now excreting even more of the delicious nectar.

She watched silently as her hoof gently glided over the dark flank.

Reminiscing on the moment, Celestia still wasn't sure if what had happened was an act of love or lust, but regardless, it was something Celestia wasn't bound to forget anytime soon.

And neither her body forgot to remind her of her own needs. She knew the rest of her night would be nothing short of enjoyment, since all she needed to do was replay the memory in her mind. Unfortunately, she also knew full well that she'll have to take of her needs by herself.

Maybe for one last time.

"Sweet dreams, Lu," she whispered. She waited for a moment before adding, "I love you."