Eternally, Yours

Celestia leaned out over the balcony, gazing over the vista from Canterlot Castle as she lowered the sun for the day. Her golden crown, necklace, and earrings glinted in its coral light as the bottom of the bright disc kissed the horizon. Her breezy, flowy, and thin white and gold dress billowed in the breeze from so high up as her milky white form bathed in the light, as her bare feet touched the perpetually cool alabaster tiles. Her horn shimmered as she heard bare footsteps softly approach from behind.

A set of dark blue hands joined the railing, and as the sun dipped below the horizon, the moon rose. Celestia turned to face the mare that joined her and gazed upon the always delightful sight of her sister’s almost completely nude form. Skinnier and shorter than Celestia, Luna still bore a figure that gained the envy of many a model. Her wings ruffled on her back as Celestia put a hand on her sister’s lower back, rubbing gently just above the base of her tail, making her younger sister grin and lean against her. Once the sun disappeared below the horizon completely and the moon rose to its full prominence, Celestia placed a kiss upon her sister’s cheek.

“Twilight hath taken quite well to her bonding,” Luna said, leaning in to kiss Celestia on the shoulder, “It is as if she became whole new mare.”

“Years of suppressing one’s desires can do that,” Celestia agreed, “and it has only been a couple of months.”

“She hath become nearly as insatiable as Cadance!”

“Hah, and developed about as many fetishes, too.”

“Mayhap we should take her to that private room in the cabin?”

“She has not shown much curiosity in it, but, perhaps. You know as well as I it is not for the unprepared.”

“She hath handled herself very well tonight, however.”

“You know more than anyone else that it’s much more than a few steps up from spanking,” she chuckled, “your hand is very different from the metal-studded paddle we’ve used on Cadance.”

“Thou speak the truth,” Luna chuckled, “perhaps we should arrange an introductory session with her?”

“We should, and I will send Cadance a letter tonight.”

A pause as the chuckling died down, and the two sisters stayed where they were, leaning over the stone railing with their skin touching. The silence of the night sounded soothing far above the ground, especially atop a mountain. The occasional rock cracking and tumbling down, a gust of wind, the distant sound of a pony walking on the stone road far beneath them, never thinking to look up.

“Sister,” Luna said, “I want to marry Twilight. It vexes me that she has not volunteered to do so, yet.”

“I gave her the invitation,” Celestia corrected, “she knows that the offer is always going to be open, and we shouldn’t force that upon her. The bond is there, Luna,” Celestia assured her once again, turning herself to the side to face her sister, and coaxing Luna to do the same, “if she does not want to marry us then that should be her decision. She does not need marriage to perpetuate her bond with us; Marrying you worked for you and I, and for Cadance. You asked me to marry you, and I said yes. Cadance asked to marry us instead of Shining Armor, and we both said yes. It meant a lot to all of us to be married. We should not assume that marrying us has the same draw to Twilight that it does to us.”

“But I feel so incomplete without it,” Luna pouted, as she leaned her head into her sister’s chest.

Celestia embraced her sister gently.

“We cannot force this upon her,” she cooed, hugging her sister tightly.

“It is only a ceremony,” Luna said, “It is not the same as the one her father and mother share; it will never be made public.”

“Then ask her, if you want it so badly. Tell her what the ceremony means to you!”

Luna smirked as she squeezed her sister tighter.

“I shall.”

Celestia reached down to grab Luna by her thighs, and hoisted her sister up. Luna responded quickly by wrapping her arms around the back of Celestia’s neck, and her legs around Celestia’s waist. They gazed face-to-face as Celestia walked her sister back inside, into Luna’s private bedroom, where Twilight lay fast asleep, naked on top of all the covers. An ice pack graced her plump, reddened rear, while the covers beneath seemed soaked in sweat and other fluids, as Twilight breathed lightly, her head turned to the side, with her arms tied at the wrists behind her back.

“Luna, cut those off,” Celestia gently scolded with a slight chuckle, as soon as she noticed the binds, “I know she asked you to tie them, but she’s going to panic if she wakes up like that.”

With a flick of Luna’s magic, the ropes untied themselves and fell to Twilight’s back, and her arms proceeded to slide off her back and onto the bed. It roused Twilight enough for her one visible eye to open, and look up at the two sisters holding each other in a way no other pair of sisters would dare.

“G’night, Mistress Luna,” she managed to say, before her eye closed again, making the pair of sisters chuckle.

“When did you ask her to call you ‘Mistress?’” Celestia wondered, as she proceeded to teleport the two into her own bedroom.

“Thou wert there the whole time,” Luna countered playfully, “never!”

“I suppose she does enjoy submitting to our authority, too,” she added, “I so rarely had to discipline her, so perhaps I ended up making her crave it?”

“She hath always been a fine student, sister. Thou taught her well, and she simply desires from you that which she hath always wondered about, yet never received. She knows now that it is play, and not true admonishment.”

Celestia set her nude sister down onto the bed, and Luna gently began disrobing what little clothes Celestia wore at this hour.

“I never thought of it that way,” she said as she and Luna tossed her clothes to the side haphazardly, Celestia’s growing member pressing up against Luna’s, “whoever knew being a good student might make someone develop a fetish for being a bad student?”

“A bad student with a sadistic teacher,” Luna corrected with a wink.

Celestia smirked as she took Luna’s legs into her hands and hoisted them both up and used them as leverage to flip her sister onto her belly, making Luna gasp. Celestia grabbed Luna’s tail, and cast a lubrication spell upon Luna’s rear, hoisting that tail directly up as she lined her shaft up to Luna’s rear entrance.

“It will be difficult for me to treat her that way; she has always been my sweet student. Perhaps you should be her disciplinarian?” she suggested, “have Cadance show her how that would work, while I can be gentle with her?”

“I still deign to be gentle with her, too,” Luna replied as she looked back to her sister, her wings ruffling on her back as she prepared herself, “but I shall respect your wishes, though I cannot promise she will not ask you for such treatment.”

“I will deal with it as it arrives,” Celestia assured her sister, gently shoving her shaft inside. Luna’s rear proved tight, yet well-trained from centuries of lovemaking.

“Nngh, oh sister I have missed this so,” she panted, as she sank herself deeper into the Princess of the Night.

“Mff, it was but a fortnight ago when thou had mine rear last!” Luna chortled.

Celestia countered with a firm spank to her sister’s plump rear, and watched as the moon on her right side jostled with the strike.

“Ahh!” Luna gasped, as simultaneously Celestia sank the full length of her shaft inside of her sister.

“When your body makes me feel this whole, every day without you near me feels like an eternity,” Celestia huffed as she pressed her crotch against Luna’s rear, smooshing those cheeks as she pulled back on Luna’s tail.

“Ngh, as doth yours,” Luna panted as Celestia felt her sister’s well-trained muscles inside of her massage her shaft in sync with her thrusting. Celestia thrust harder, faster, panting, and even drooling a little as she felt the intense flow of affection towards her sister, the affirmations of their feelings towards each other, and her own thoughts of the taboo of making love to her only blood relative, brought her so close to the edge.

She performed every trick she could think of to withhold her orgasm as long as possible; biting her lip, biting her tongue, thinking of Luna in a non-sexual manner, but Luna’s expert ministrations, so accustomed to pleasuring her sister like this, won out in the end. Celestia reached over and grabbed Luna’s mane and pulled back hard, making Luna gasp, as Celestia erupted her seed into her sister’s rear. She held herself fully hilted to Luna for a few moments, as her orgasm proceeded, to the sounds of both sisters panting, a light sheen of sweat gracing the two monarchs as the afterglow enveloped them.

Celestia caressed her sister’s rear, feeling its roundness, the tautness of her skin, before her eyes traced up Luna’s body, until they met Luna’s, looking back at her. She could not help but remember when they first made love all those centuries ago, how despite the improvements they made in their lovemaking, it still felt special. Even with the addition of Cadance, and now Twilight to the small circle of alicorns, much as Celestia loved them both dearly, the thousands of years spent with Luna assured her the most treasured place in Celestia’s heart.

After some time, Celestia finally withdrew from her sister, her shaft flopping from the entrance before its slow retreat back into her sheath. She sat down on the bed and helped her sister up with her, into the sheets, as they embraced in Celestia’s bed.

Remembering her promise to send Cadance a letter, Celestia used her magic to produce a pen and paper.

Dearest Princess Cadance,

It is a pleasure to write to you as always! I trust things go well in the Crystal Empire. Should you have the opportunity, Twilight has developed certain… interests, that I believe you are most capable of teaching to her.

Luna and I miss you greatly, and it will be wonderful to have the four of us together at once; alas such an opportunity is so rare to present itself nowadays. Luna and I will try to find a way to clear our schedules to have a get together at the Winter Palace, or perhaps the secret place, but it will take time. Do respond at your earliest convenience!

Ever yours,

Celestia

With a flick of magic, she sent the message off to Cadance, and lay her pen down. She placed her arms around Luna and fell deep into sleep.

. . .

The next morning, Celestia awoke to a familiar alarm. Her eyes opened and beheld Luna still curled up in her arms, and a smile graced her face. It felt so criminal to Celestia to leave such a tender embrace, but the sun must rise, and so rise from bed she must. She gently maneuvered herself from Luna’s form, gently letting Luna’s limbs down to the mattress as she stood up from the bed, and in her nude glory, sporting a semi-erection from sleeping, she approached the window. Her eyes closed and her magic surged through her body. She felt within her the sheer size and weight of the celestial body she moved, yet her magical strength lifted it, with no small effort, as light graced the window from her room, opposite the castle from Luna’s room. Her eyes opened, and she gazed upon the rising sun as it began its journey across the sky.

Behind her, she heard stirring. She turned around and saw Luna awake, and smiling. A smile graced Celestia’s face in return as she turned her whole body back around and walked towards the bed.

“Come on up, sister,” she encouraged, “best check if Twilight is all right.”

A quick flash of magic flashed as the two mares clothed themselves in basic robes. Luna rose from the bed and hopped up, clinging to her sister for a piggy-back ride, making Celestia chuckle as she held onto Luna’s legs.

“Mmm, all right,” Celestia chuckled as she briskly walked out of the room, careful to lower herself a bit so Luna would not hit her head on the doorway, before going across the hallway to Luna’s room, doing the same as the door opened for it. The sight of Twilight in the same position she assumed from the previous night concerned Celestia a little, but a quick check of her vitals through magic showed that Twilight simply remained in deep sleep.

“I’ll wake her,” Celestia said as Luna lowered herself onto the floor. Celestia crawled onto the bed while her sister wrote down a breakfast-in-bed order for the cooking staff. Celestia caressed Twilight’s head, cupping her cheek a little and smiling a little. “Wake up, sleepyhead,” she cooed in a motherly tone, “the sun’s out!”

“Nngh, five more minutes,” Twilight groaned as she opened one eye to look directly up at Celestia. She smiled and pet Twilight’s cheek again and flipped Twilight over onto her back, reaching over to gently tickle Twilight’s belly, grinning and laughing a little. “Hey, stoppp!” Twilight protested playfully as her body reacted, trying to roll away, and eventually rolling herself out of bed to stop the tickle assault. Celestia chuckled as she watched it all happen, Twilight’s nude body standing bolt upright, but smirking as she re-composed herself.

“Fine, you win,” Twilight said as she walked around the bed and hugged Celestia, who returned the gesture. A flash of Luna’s magic teleported the breakfast order to the kitchen, while Celestia prepared a table for the three of them.

The meal appeared via teleportation magic, a sign of the strong magic embedded into the very walls for the centuries that it stood. Decorations of the night sky surrounded them, along with portraits of the two sisters together, never alone, as the three present alicorns ate their meal.

“Art thou feeling better tonight?” Luna asked.

“I am, thanks,” Twilight said with a gentle smile, looking across the table as she took a sip of her morning orange juice, “the ice pack really helped. It’s still a little sore, but I think I’ll be ok.”

“I am glad to hear it,” Luna agreed, as she looked across to Celestia, who winked in response, in the one eye not facing Twilight. “When we finish, dear Twilight, may we talk privately?”

“Oh, of course,” Twilight said, her face slowly falling to a look of concern, “Is everything all right?”

“It is,” Luna assured, “My sister knows what vexes me, but I simply wish to speak to you alone.”

“Luna, I think whatever you can say to me, you can say to Celestia,” Twilight said, reaching over and squeezing her hand, “I doubt she’ll find anything you say upsetting.”

“It’s all right, Twilight,” Celestia chimed in, “I know what Luna wants to ask you; she spoke to me about it after you passed out last night. I promise, she just wants to feel more comfortable speaking in private.”

Hesitantly, Twilight nodded as she finished her meal, still squeezing Luna’s hand.

“Well, all right, Luna,” Twilight said with a gentle smile, “Just promise me that we’ll tell Celestia after we finish talking?”

“Indeed.”

. . .

Breakfast finished soon after, and Celestia took her leave, beginning her duties for the court by teleporting out of Luna’s room, leaving her and Twilight alone.

“Twilight,” she said as she stood up, and coaxed her lover to her feet, “You are one whom I cherish dearly. Ever since you bonded with my sister, I felt the bond with you just as strong as the bond I feel with Cadance.”

Twilight smiled, and as she stood up, she reached a hand over to Luna’s shoulder, gripping it gently, affectionately.

“I know it is much to ask this of you, but, it means so much to me,” she confessed, “I wish, to be married to you, Twilight. It feels so incomplete without it,” she explained, as Twilight’s ears fell back, and her face flushed red. She looked down and away from Luna’s gaze for a bit, before returning her gaze back to Luna’s.

“Luna, you mean so much to me, too,” she agreed, “And I love the idea of marrying you, Celestia, and Cadance!”

Luna nodded, but her eyes fell at the end of Twilight’s sentence.

“…However…?”

“I can’t keep something like that a secret from my friends; from my family!”

“’Tis but a ceremony, Twilight,” Luna tried to explain, “It hath no legal meaning.”

“But,” Twilight said, biting her lips, “I want it to mean something to the world. I want everyone to know that I’m a wife. I can’t keep secrets like that, even if it is just a ceremony we do in secret.”

Luna’s face descended into one of dismay.

“I understand it is much to ask, Twilight. I simply feel as if, there is one last step to take with thee, and it will eat away at me for every moment it hath not been taken.”

Twilight looked up at Luna, a tear in her eye, but leaned in and hugged her tightly.

Luna hugged her back, gently patting her shoulder.

“Mayhap, mayhap we can come to an agreement? Tell only those closest to you, those you can trust to not take unkindly to our arrangement, those of whom can keep the secret from the wider public?”

Twilight sniffled a little bit, but patted Luna’s shoulder, and leaned back, facing Luna once more. She nodded in response.

“I can do that,” she said, “I think the only problem will be my parents, and the fact that you’re married to your sister. I doubt many ponies will understand that.”

Luna nodded and kissed Twilight’s forehead, just to the left of her horn.

“It shall be Celestia’s and my secret to keep,” she agreed.