Royal Sisters Have No Secrets

by darf

Rating: mature
Tags: Romance, Sex, Princess Celestia, Princess Luna, My Little Pony: Friendship is Magic
Length: 5113

Celestia and Luna make time for some sisterly bonding--WITH SEXY RESULTS!

Celestia still has a secret, but Luna knows all about it. Can sisterly love help deal with Alicorn biology in ways magic can't? Read on to find out!

Written as a commission for Anonymous.

Please pay me for horse sex words, i'm very poor.

Published 2016-05-30 15:20:02 UTC
Last updated 2016-05-30 15:20:02 UTC

The Only Chapter (FOR SEX)

The castle courtyard was in a state of perpetual summer, corralled by magic into a constant state of sun, flowers, birds, and a mysterious aura that made every pony sitting in or around the garden feel as though everything was somehow exactly right in the world—which, as far as anypony knew, it was anyway.

Celestia had decided to have her breakfast at one of the stone tables in the garden corner, next to the many vines scaling the nearby brick wall and trellis, and all the beautiful varietals that remained in bloom as long as she wished them to. Pausing from her marmalade and daisy toast, Celestia raised her nose to one of the nearest flowers—a lilac, eastern, perhaps?—and inhaled deeply, disregarding her nose’s habit to prickle at the slightest hint of pollen. Some things were too beautiful not to enjoy.

“Good morning, dearest Sister.” Luna’s voice caught Celestia by surprise, but after so many centuries of practice, she was very good at not letting anypony else know when she was frightened.

“Good morning, Luna. Might I ask what you’re doing awake at such an hour? Normally you’re long passed out by now.”

“A sudden urge to stay up and enjoy your morning, Sister.” Luna smiled and did a short survey of the garden, taking in all its blooming colors and natural life. She sniffed at a nearby flower, and her smile deepened. “As beautiful as my night is, there are certain phenomenon that occur only when the sun is out. Surely you’re not bothered by my joining you?” Luna placed a hoof on her chest, her eyes wide with potential hurt.

“No, not at all!” Celestia felt an unequivocal sense of panic rise in her chest—why was she so afraid of her sister thinking that? Of a misunderstanding—of losing her, in some way, again? “I was just surprised… wonderfully surprised. Please, come and sit with me, dear Sister.”

“Thank you… Celly.” Luna’s smile became a smirk as she sat, and Celestia’s small blush matched the bushel of roses behind her.

“It’s been a long time since I’ve heard you call me that,” Celestia said, picking her toast back up and taking a small bite. She munched on it for a few seconds, enjoying the swirl of different yellow flavors before she swallowed. “It brings back memories of when we were young.”

“Memories are something I think of a great deal,” Luna said. Her smile had vanished into an almost blank look—a stoic stare somewhere far outside the periphery of the garden. “I have had a lot of time to think.”

“Oh, Luna, I’m so sorry. You know… you know I couldn’t have known if I was doing the right thing, what I was supposed to do at all… surely you can forgive me somehow?”

Luna stared down for a moment with the same thin-lipped expression for a few seconds, then suddenly snapped her head up, caught again on the smile she had worn in. “Of course, Sister. I’d already forgiven you by the first day… I don’t mean to cause any guilt in you. My actions were mine, and I accept the consequences of them. I’m just so glad we’ve managed to become sisters again.”

Celestia’s smile matched the beam of the sun.

“Me too, Luna.”

What started as a one-off family breakfast became a semi-regular occurrence, as Luna took time out of her sleep scheduleto stay up late once or twice and share a part of her sister’s morning with her directly. Before she knew it, Celestia had started looking forward to these morning breakfasts more than the morning itself—on days when she had only her marmalade toast for company, she found the whole world lacking. Where was her sister, to share in the beauty of life? Where was that beauty at all?

She told all this to her sister one morning in July.

“I don’t mean to say I’m lonely all the time,” Celestia said, punctuating with a bite of her toast. She liked to talk and eat at the same time. Luna was sat across the table, staring forward and listening intently. “I mean… you do understand lonely, don’t you, that type of special Alicorn lonely, and I suppose I just missed you more than I thought, after Twilight spent so much time here and then left again, and, I don’t know…” Celestia let her sentence become mumbles. Luna’s hoof on her shoulder drew her attention.

“I understand what you mean, Sister. I understand what it means to long—what it means to be truly alone, in solitude of self. I wished not to say anything for fear of making you… of letting you feel guilty for my own sorrows. Silly Celly, the two of us lonely right next to each other, with neither saying anything…” Luna’s sentence trailed off too, but it ended in a smirk, and eyes that could cry or laugh into the next thousand years.

“Oh, Luna,” Celestia said with a heavy voice, throwing her forelegs around her sister, “I love you so much.”

“I love you too, Celly.”

The two of them hugged until the morning became afternoon, and then a little longer still.

Despite herself, Celestia found her body responding to the hug in ways she… hoped her sister wouldn’t notice. Was it that time already? Or had she merely responded to her sister’s touch? But that was awful, if it was true. Luna, her sister…

When the hug ended, Luna was smiling—but her eyes glimmered in a way that Celestia remembered from their childhood, a mix of mischief and sibling affection.

“Thou art still so small in some ways, Celestia… almost like no time has passed at all since we left.”

Small? Celestia felt the shiver in her stomach, and lower down than that. She crossed her legs, hoping her present shame would be well hidden. Surely Luna hadn’t—

“Your hugs still feel so gentle, just as we remember from childhood.” Luna’s smile went on, but whether the glimmer had never been there in the first place, or if it was gone just now, Celestia could see only genuine happiness and love in her sister’s smile—not an innuendo about the size of her princess’ secret.

Celestia let out a sigh (in her mind, of relief), and smiled back at her sister.

“Your hugs are the same as I remember too, Sister.”

A slumber party. Celestia had needed to muster every strength to contain her excitement—in the same way she’d learned to hold her emotions at length, keeping them organized in a fashion she could control and order, it had become second nature to not allow herself that purity of feeling; to keep away the real emotion that boiled inside her, held down by millennia of practice and restraint. It almost felt too good to be true—her sister, the two of them, sisters sisters sisters, she could say the word as much as she wanted, were having a sleep over. Just like the ones they used to have before… everything. Before Discord and Equestrian warfare and even Twilight Sparkle and her friends. Back when their parents had been there. Back when they had been just sisters, and nothing else.

Celestia sighed in her canopy bed. Her room was the obvious choice for the sleepover, given the sheer size—but at Luna’s insistence (and Celestia’s secret urge to agree with her), Luna’s bedroom had become the designated ‘sleepover space’. Celestia was checking her inventory just before heading down the great hall to the moon-decorated room that seemed an eternity away.

“Let’s see… night-gown… toothbrush… alarm clock… diary…”

A bell rang in the eternity of perception. Celestia realized, in a sudden but slow way, how much she and Twilight were alike…

“Sister?” Luna’s voice came from behind the heavy bedroom door, followed by two soft knocks—as commanding as Luna’s royal presence could ever be, the same projection that shook the stars with the voice of Nightmare Moon, restrained itself to such dainty taps on her sister’s door. Celestia’s heart melted even more upon itself. “Are you ready to begin our party? We can talk about the colts we’ve kissed, or mares, if it so happens to be the case…” Luna giggled. “Or braid each others’ hair and make small talk into the night.”

Small talk—now Celestia was just hearing things. The same way Celestia couldn’t help but hear the antiquated tone in Luna’s voice—the way a party was something that to her existed only a thousand years ago. The excitement in her chest threatened to explode—as well asthe little voice between her legs refused to let itself be forgotten.

“Yes! I’m ready. Let’s go.”

The night was as young as the morning, but silver, instead of gold.

“We have—er, I, have always wanted to watch this movie with you, Sister,” Luna said. “I discovered it only shortly after my return from the moon, and it spoke to me so deeply that I knew I must show it to you some day.”

“Well, I’m here now,” Celestia said, smiling. She snuggled up under the blankets (black, with silver moon and star patterns sewn throughout), basking in the warmth of another body, another pony next to her, their two magically soft night-gowns slipping and rubbing against each other with the soft sound of kissing fabric, whispered textiles delicate like breaths of the heart.

“You feel soft, Sister dear,” Luna said, snuggling back, pressing herself harder against her sister’s body. It was just like when they were young.

Celestia, however, was not exactly like when they were young.

For one thing, there had been no… problem between her legs, such as this, to arise when she was a filly. That was a natural consequence of biology, as she understood it—and Alicorn biology at that, which was more mysterious and confusing than it had any right to be. Just like everything else, she was certain until she wasn’t, and the ‘wasn’t’ terrified her like nothing else, because it meant she was more pony than princess, another soul subject to the whims and janglings of the universe’s desires.

More-over, she remembered her encounter with her star pupil—the way, in a secret room of instruction, she turned from an all-in-her-senses ruler of free Equestria into a horny mare begging to be rutted, feeling a spasm of excitement shoot through her body every time the smallness of her ‘princesshood’ was called up. The words sank into her mind like deep claw-marks, heating up her sex even as they ran through her memory; “You’re practically… tiny, compared to how big I am.”

Right now, the universe apparently desired to remind Celestia of the changes in her anatomy since the slumber parties of her youth. It seemed keen to remind her that, while the body in a soft nightie snuggled up against her sister, it also happened to be a fully-filled out royal form, with all the curves and plushes and soft angles that Celestia’s own body had, though different and moon-like on Luna in their own way. Celestia knew—she thought, anyway—that Luna must surely have encountered the same change in her anatomy—the one that made it hard to concentrate on the opening credits of the movie when Luna pressed herself back further, more body warmth, but also more pressure, more friction, more of her almost ludicrously shapely ass grinding against Celestia’s… cock. There. She said it, in her head. Her cock. Her cock that was rock hard and as small as ever and wanted to be anywhere inside the pony currently in front of her—inside her sister. Oh, heavens above, don’t let me think things like that…

“Celly? Is everything alright?” Luna had paused the movie, oh no, and turned her head towards Celestia, luckily obscured from full vision of her sweat and blush by the darkness of the room—black curtains hiding even the moonlight, the only glow from the screen in front of them. “You suddenly seem a little uncomfortable.”

“Oh, do I? I’m… I’m not, though, you know. I’m just… I, uhm. I’m just really, uh, enjoying, my time with… you. You know?”

Luna’s head tilted in the darkness. Gears turned behind her eyes. Her body adjusted backwards, and at last felt an understanding of the situation. Her eyes widened.

“Celestia,” Luna said, words slow and purposeful. “Dost thou have…” Luna shook her head, clearing away the old-world diction that she slipped into when her brain couldn’t keep up. “Are you… hard?”

“Oh, Luna, I’m so sorry! Please don’t be mad at me, I couldn’t help it! It’s… it’s… it’s been a long time, and I, I, I don’t know, you feel so soft, and, and, I just love you, and, and, I’m so s-sorry…” Celestia could feel tears build in her voice, something that she could count in a singular nest of occurrences in her millennia of existence—to be so out of control of her emotions that tears could come at any moment.

The feeling of Luna’s ass grinding back onto her stemmed them, for now.

“Luna?” Celestia’s voice shook slightly still, but now more because she couldn’t believe she’d just felt her sister so purposefully shove her backside onto Celestia’s small but aching erection.

“We… I, am not mad at you, dear Sister,” Luna said, smirking like a crescent moon. She pushed her ass back again, and earned a short hiss of breath through Celestia’s teeth, and a twitch of her cock as well. “We are well aware of the difficulties of… Alicorn anatomy. Though, we must say, yours is… smaller than we are used to.”

Celestia heart skipped a beat. She couldn’t believe it. More so, her body couldn’t believe it, and so was sitting almost in stunned paralysis, instead of doing what she felt like she wanted to do, which was thrust every inch of her Alicorn-cock (few though they might be) into the curvy pillows of her sister’s butt. She hadn’t paid any attention at all to how it—to how she—had grown since her return from the moon. While Celestia’s adult figure had become stately, and lithe at times, Luna’s was more… compressed. She had softness, and, more importantly, curves. She had a booty. Celestia’s small cock throbbed between her legs, aching to be called attention to again.

Softly, as though gravity was moving her itself, Luna’s body slid back. Her butt pressed harder into Celestia’s erection. A dribble of precum leaked out the tip of her cock.

“Oh—Sister, please, you mustn’t—“

“Mustn’t what, dear Sister? Mustn’t touch your miniature princesshood?” Luna responded, musically, with a little growl in her voice the type Celestia hadn’t heard since they were children, playing make-believe in the gardens and staying out late past the insistence of their parents. Luna had always been the trouble-maker, convincing Celestia to stay out when she wanted so much to go back in, only because if she left, then her sister might not like her anymore…

It was hard to think. It was hard to do anything other than moan, a feeling which Celestia repressed, burying the noise in her throat, but still moving her hips forward of their own accord. Oh, please, don’t let her tease anymore…

“Celly, there’s something I’ve wanted to do for a long time,” Luna said.

The blankets were off in a lightning flash, and Luna’s hoof was on Celestia’s shoulder, a firm shove, throwing her flat on her back, her anatomy in plain view of her sister, even in the cloud of dark that was her room. Luna, of course, could see quite well in the dark.

“Aha! Just as we suspected.” Luna pointed a hoof absurdly at Celestia’s hard-on, standing in all its meek glory. “Thou art no bigger than a little colt. Haha!” Luna’s eyes sparkled with glee, the type she hadn’t felt since she was young, teasing her sister even though she had no right or way to get away with it—but because Celestia let her, she did.

Celestia, for her part, could only turn her head shyly from side to side. The blush was hot in her cheeks, and through her whole body, it felt like a fire that started in her stomach and spread low into her… where her… where she was…

“Nevertheless, you look quite desperate for attention, Sister,” Luna said, smirking all the while. Her diction flipped in and out of archaic, toggling with the triggers of her own glee and lust. She raised a hoof to Celestia’s erection and stroked slowly down the side, the lightest touch she could muster, lighter than air on a feather, earning shivers down Celestia’s whole body, and twitch after twitch of her cock, now leaking a steady dribble of pre down the underside of her shaft. Celestia couldn’t hold back the moan this time; it came freely, echoing in her own head and the small acoustics of Luna’s bedroom. Luna’s smile grew sinisterly large.

“Is thine miniature cock anxious for relief, dear Sister?” Luna stroked Celestia’s erection again, and Celestia’s moan came louder, an animal noise, the ‘fuck me’ sound that she hadn’t made since Twilight last did exactly that—since the same words had reduced her from a princess to a quivering mess of want and sex, of size that couldn’t measure even to the idea of her stature, and how right it felt to submit to it.

“Yes,” Celestia said, gasped, almost breathless. “Yes, yes, Sister please, I need—“

“Shh.” Luna placed a hoof on Celestia’s mouth, while at the same time continuing to rub her free hoof along Celestia’s erection. Celestia thrashed on the bed, her hips rocking upwards against Luna’s touch, her moans muffled by the hoof over her lips.

“Mmmhm!” Celestia gave an extra hard thrust as Luna pressed gently at the base of her cock, then circled around with her hoof, collecting as much precum as she could before stroking up and down again, lubing every side of Celestia’s miniscule hard-on.

“Wouldst thou like thine pretty little cock sucked, Sister dearest?”

“Yes!” Celestia practically screamed it, hips thrust up again, only minutes away from exploding as it was.

“Then thou must earn it. A cock that small does not demand attention just so.”

Celestia felt her body flipped again, amazed at her sister’s strength, but in a way unsurprised, considering how light and moveable Celestia’s body had become after her arousal reached its peak. Luna brought her up onto all fours, the same position she’d been in to instruct Twilight those many months ago—face to the wall, legs slightly spread, cock harder than diamond, leaking all over herself and the floor, ready to take whatever pleasure or punishment her sister was content to give.

“Spread your legs wider,” Luna commanded, standing herself behind Celestia’s slightly taller frame. “And bend down some. Show us your tiny hardness, so that we might smirk while we fuck you.”

Celestia responded wordlessly, taking perfect position. She knew. Her cock throbbed.

“I love you, Celestia.”

“I—“

The words could only form in Celestia’s head before Luna’s cock buried itself inside her. There was no pain, no need for slowness—she was as willing and ready as she could ever be, to be fucked, to be completely taken and used and to drown in the pleasure of her own loss of control, to be someone else’s completely—to be her sister’s.

“Oh! Luna!” Celestia couldn’t help but cry out, and her hips matched her words, rocking back against Luna’s thrusts as they began to assemble a steady pace. Twilight had been one thing, but Luna was entirely another—whether her more comfortable size, which wasn’t difficult after Twilight’s considerable length, or just the fact that it was her sister, the pony she hadn’t seen in centuries, whom she loved more than the world itself, now sharing with her in one of the most intimate experiences life would permit her to have. Luna’s cock worked its way inside her perfectly, her ass hugging it, squeezing hard, making her sister groan roughly behind her, matching her own sounds, moans, softer and more gentle, but also more needy, because she was, because she did need, she needed cock, her sister’s cock, inside her right now. Even in the short half-seconds where Luna withdrew to thrust back in again, Celestia could feel a threatening emptiness—but when she pushed forward again, braced hard and rough and slammed in deep, Celestia felt full, complete, so close to orgasm she could touch it with the tip of her nose, only to lose it again when Luna drew back once more.

“Are thou still hard, Sister dear? Thine cock is so small, we cannot tell.”

The spasms, again. Celestia’s cock ached at every mention, her body sensing the shame that burned throughthrough her member as pure pleasure, transformed into desire, into wanting to be even more worthless, even smaller, nothing to anyone but a hole meant to be used, and only that to her sister.

The bedroom, to Celestia’s nose, reeked of sex. She could smell her own scent, the sticky pre-cum that coated her hooves and belly when she was left to take care of herself, something like a cross between honeydew and salty citrus. She could smell her sister’s arousal, the sheer aura of her lust, that made the air thick with electric twitches and the tingle inside her that ached her close to cumming even just from the idea of her sister’s cock inside her. She could smell her sweat, pouring down her forehead now, minute compared to the steady stream of pre that was leaking down her cock, onto the floor, sometimes onto her leg when her body thrashed and a bit or two flung themselves backwards. It was impossible to think of anything but sex; the act of fucking, of being fucked, of having her beloved sister’s cock inside her the way she felt like she’d always wanted—

“Luna!” Celestia’s orgasm built from almost to now like a strike of lightning. She had almost no time to open her mouth before her cock spasmed underneath her. With Twilight, there had been no time—the sheer size had pushed her over before she could speak. Now there was only a chance at a small warning. “I’m…”

That word too, lost itself, as Celestia came. It was the same as it had been with Twilight, but more still, by perception or reality, she couldn’t tell. Her whole stomach felt sticky. Her cock ached as it fired rope after rope of sticky Alicorn cum onto herself, the bed, the bedding, and even the bedside table nearby. She came so hard her eyes threatened to roll back in her head, or at least give her stars for a few seconds as she returned to earth. She wasn’t sure if she could—time stopped as she came. It only returned when her cock had fired its last bit of cum, a tiny spurt that leaked onto the bed directly beneath her. Luna’s cock was still inside her, harder than the ache of living.

“Dost thou feel better, little Celly?”

No words. Celestia panted, head hanging, sweat pouring off her forehead. Breaths came sharply, for almost a minute, before she could speak again.

“Yes… I… thank you, Luna.”

“You know how to thank me, don’t you, Sister?”

Celestia nodded. She felt her sister pull back, out, her cock leaving that feeling of emptiness again, even though it was subdued, dulled in the post-orgasm euphoria that danced in waves through Celestia’s entire body. Her sister’s cock. She wanted it so badly, her mouth almost watered.

Luna sat back on the bed, looking almost like a bachelor playcolt awaiting his daily attentions. Celestia embraced the look—she wanted to be low, used, an object, reducing herself to something only for her sister’s pleasure, if that was what it meant to bring her sister pleasure. She wanted to suck Luna’s cock, swallow every drop of her cum, every drop of her precum, every dollop of sweat that dripped from her stomach down and elsewhere, she wanted to swallow her sister’s love and swallow it again a thousand fold.

She began by licking—starting at the base of Luna’s cock, which again, was more conventional than Twilight’s—ten inches, at a rough estimation—all around, before going up one side, then down the other, with special slow attention to the head and its underside. She could tell her efforts were well-placed when Luna twitched, hiding her noises under the same hoof that had muffled Celestia’s. Luna liked being quiet, fighting her own enjoyment—which, of course, made Celestia want to try even harder. She gave one last lick around the underside of Luna’s head before parting her lips and swallowing her sister’s shaft whole, all ten inches down her throat without even batting an eyelash.

Despite herself, Luna gasped.

“Sister! How did you… oh, heavens!” Luna bucked up into Celestia’s mouth as Celestia began the blowjob proper, effortlessly bobbing her head up and down, sliding the entirety of Luna’s length into her soft mouth and throat. Her tongue wiggled its attentions as Luna’s cock was in her throat, lapping at the underside of the shaft and base. When she pulled her head up, her tongue licked at Luna’s head, around and around, teasing and tickling and making Luna’s groans into unintelligible slurs of syllables, made even less comprehensible by Luna’s insistence to muffle them herself.

Celestia wanted to talk, the way her sister had talked to spur on her own lust, but it was impossible with her mouth so full. She resorted to speaking without words, moving her hooves over Luna’s body, lightly touching her legs, her hooves, the insides of her sensitive in-between curves, her stomach, chest, and neck. Luna thrashed harder than Celestia ever had, so intent on holding back her sounds that they came out in her body, wordless cries morphed into bucking hips and twitches Celestia could feel in her throat.

Celestia removed her mouth from Luna’s cock with a soft ‘ah’, and looked at her sister with the softest, most innocccent eyes she could muster. “Do you want to cum, Sister?”

Luna looked offended at the question. She did not take as well as her sister to being teased. But it was impossible not to answer—her cock told the whole story anyway.

“Yes,” she said, gritting her teeth, hips moving as punctuation. Luna gasped and jumped slightly as Celestia gave a quick lick of the head of her cock, followed by a giggle.

“Do you want to cum down your sister’s throat?” Celestia asked, taking a long, slow lick up the underside of Luna’s ten-inches—tasting the precum that leaked down slowly from the tip.

“Yes! Enough! Let us cum!” Luna’s diction and voice rose, almost yelling, almost Royal Canterlot Voice, which meant, in some small way, that Celestia had sort of won.

“If you insist,” Celestia said, smiling, and lowered her head.

She sucked Luna’s cock with a vigor. Her head movements became quicker, her hooves pawing and groping softly at every bit of her sister that was available. Luna’s hoof became insufficient to hold back her sounds, so she replaced it with a pillow, black and star-sparkled, which even still only made her “Mhmmms!” sound like “Mhmmffhs!”, which was the same type of wordless, animal noise anyway. Celestia’s cock, despite its recent release, twitched between her legs.

She could tell her sister was close—the way she could tell so many things about her sister, by intuition only—when she was close, when she was sad, when she needed to talk about something. When they were young, Celestia had been sure it was a type of telepathy—a bond she could only have with her sister, through magic or some other means. As she grew up, she began to understand that perception was not just something she could share with her sister, but with anypony she met. But with anypony else, were things less certain? How could she really be sure she understood them? With her sister, it was so different, the truest love she had ever felt.

“Celestia! I’m going to—“

Celestia didn’t let her say the word. She reached up a hoof and put it over Luna’s mouth as she began to cum, the first spurt hitting the back of Celestia’s throat hard. Celestia didn’t flinch, swallowed, and kept bobbing her head, refusing her sister even one moment of reprieve from her own pleasure. She could tell the effort was well-spent—Luna’s hips threatened to break the bed on their downfall back, and the base of her cock slammed against Celestia’s lips over and over again as she pressed it hard into the warm grip of Celestia’s throat. Goodness, Luna knew how to cum—it felt almost like she hadn’t done so in a thousand years, waiting for this exact moment to let herself free. Celestia almost smiled as she swallowed, keeping her lips locked firmly around Luna’s erection until it was no longer erect, softening on her tongue and letting her swallow the last drop of sticky goodness that her sister had given her.

The bedroom still reeked of lust. Celestia collapsed back onto the sheets, surprised and pleased to find the wet-spot she’d expected missing. Luna took a moment to shiver on her back before turning on her side and matching her sister’s position, little spoon the way they had been what seemed like forever ago, before the first step into a world neither of them could look back from.

It was hard to find words. The words came easy when they were stirred by something else—an emotion, a lust, a need or an imperative that presented itself. But in the calm of the afterglow, words felt almost like air—something that can only be understood by silence, true participation in its presence. Celestia’s brain emptied of words—her body filled with emotion, love, and the warmth of her sister. Luna sighed, pressing her head back slightly, mane to Celestia’s nose, the scent of night overlapping the scent of day.

“Luna,” Celestia began, nuzzling her nose forward into the starlight of Luna’s mane, “how did you… how did you know I was… that I wanted…”

“A certain violet someone may have been dreaming about you, dear Sister,” Luna said. Even without seeing her face, Celestia could sense the smirk—could shiver along with the reality of everything around her, that her sister had known the whole time—had coaxed her like this into something she had never known she wanted. A love that had taken her completely by surprise.”Now that we know for certain the amount of fun you can be… this shan’t be the last slumber party, we hope,” Luna said.

A thousand years, and how sisters remained sisters.