My Sister, My Heart

by Problemsin

Rating: mature
Tags: Princess Celestia, Princess Luna, My Little Pony: Friendship is Magic, Romance, Porn, Sex
Length: 4203

After a string of failed dates, Luna wants to learn from the best: her sister.

After a failed date, a thought was seeded in Luna's mind. How is Celestia's romantic life?

Eager to find out, she explores her sisters dreams. Overtaken by what she saw and the feelings that it gave her, Luna concocts a plan to go on a date with her sister.

My submisssion for the Incest Is Wincest group april contest.

Published 2019-04-29 14:20:01 UTC
Last updated 2019-04-29 14:20:01 UTC

Chase the Light

Today was the day.

Luna did a little dance at the reminder and left her room. Strutting down the halls of the Royal Canterlot Castle gave her time to think. I have a date with Celestia; my sister! I can't believe my luck! I never expected my plan to work!

**************************************************************************************

Something had been bothering Luna ever since her return from the moon. A thousand years in the moon was hard to adjust from, and nopony except Celestia seemed keen to make the transition any easier for Luna. Mortal ponies didn't understand, they couldn't understand. A thousand days is long to them. Years? Incomprehensible. Mortal ponies live so fast, and they waste their lives on trivial matters.

Years went by, and Luna fell into her routine as the Princess of the Night. Royal customs were an even bigger bore than plebeians, and even worse, they were important for princesses. Everything a princess does that is deemed 'abnormal' raises questions. Of course Luna tried her best to follow customs, there was that time she courted the Duke of Trottingham! It was a clumsy and awkward, more diplomatic flattery than anything, but it was a try! Custom dictates that a princess has to play flirt with upper class ponies, and if the princess herself is single, the other ponies might take it seriously.

How come Tia doesn't fret over such matters?

Pacing around the room after another failed date, Luna thought about her sister. Celestia has a thousand years of practice that Luna doesn't. That mare must be a master over such matters! Perhaps time, too, will be kind to Luna, but having met so many stallions and to no avail takes its toll. Practice is not the missing ingredient.

The problem has to be the stalllions.

Despite her best efforts, Luna could deny it no further...

I wonder if Tia likes mares?

Luna stopped and shook her heard at the thought. Her sister could have any stallion she desired, but surely remained single in order to focus on her duties.

Back to work, I am wasting too much time.

But what if she does?

With the thought firmly planted in her mind, Luna took a dream detour that night and visited her sister.

Luna's eyes widened. She almost accidentally entered Celestia's dreams. Most ponies place some sort of hurdle, usually a simple undefined wall, in their dreams. Not that it mattered to the Princess of the Night, but nigh all ponies keep their private thoughts near and not so easy to stumble into.

Was this even Tia's dream? It can't be, its just a meadow. I suppose it is pretty orderly, like something Tia would make...

There she was, Celestia herself. Wearing a cute summer dress, she inspected some flowers.

Before letting out the beginning of laugh, Luna caught herself and dropped below the grass to avoid any attention.

Its normal for ponies to dream of life's they cannot have, but this! And wearing that sundress, she's probably imagining herself as a young mare on her first date. I must know where this goes.

Luna peaked out of the grass onto an unaware Celestia. On the ground as well, stretching out over the flower bed. She stretched all fours, turned over onto her back, and closed her eyes. The dress showed off her form, and Luna's gaze followed it from the neck, across the chest, and to the thighs before she stopped herself. Celestia had always watched her figure, of course she wanted to show it off. She always put herself out, and always commanded attention to herself. Luna continued to watch, her body fidgeting in place. Celestia spread her outstretched legs as the wind picked up. Looking at her sister's flank, Luna lost herself in thought.

Tia was always blessed. A perfect firm butt and soft fur with no work. The sun on my sisters flank exists just to show off to her round ass. And her thighs, you cant help but want to grab them. At least I inherited the brains.

Lying on her left hoof had made it start to hurt. Her face flushed red with embarrassment when Luna realized where she had been rubbing. A flash of embarassment, then back to work. She reaffirmed her gaze on her sister. Luna's mind was blank, then she was mentally and soon out loud repeating 'I'm just messing with Tia, spying on her, like all sisters do.'

Suddenly Celestia was embracing another figure in the flowery field. A dark, indiscriminate mare. More details became clear to Luna, and her heart started racing. Dainty wings fluttered, then a petite horn came into view. Her dark mane cascaded in the wind and hide the apparition's and Celestia's face from view.

No, the mane is moving on its own.

The sound of her heart beat was enough, Luna hoped, to bury the sound of her masturbating to her sister embracing another Luna.

With their hooves fully embracing each other, the other Luna started to repeatedly hump Celestia, which she more than opened up to. Her lower legs, wrapped and locked, pressing against the other Luna's back, could not resist once the other Luna nuzzled Celestia's neck with her snout and worked her hooves through Tia's hair. Luna saw that her sister was completely at the mercy of the other Luna. She had given herself to the dream apparition. Luna found herself about to stand up, but then restrained herself.

Celestia's body was paralyzed in pleasure. Soon Luna could hear her moans, which grew louder with each hump. But then the other Luna raised its head, only to be grabbed by Celestia and forced into a kiss. The movement died down, but the passion remained. On their sides, facing each other in embrace, Celestia reached towards the other Luna's pussy. Celestia kissed her, then again, and again, and soon made her way towards the dark mare's ear.

“You are so crude. A thousand years on the moon turned you into a barbarian. But you are still a princess at heart, and my little sister. Let me tame you and show you control.”

Celestia then nibbled the other Luna's ear, and began rubbing her pussy. The white mare's wings slid under her partner's and began caressing the fur. Dream Luna's wings raised, and the real Luna noticed that hers had as well. Celestia's wings pushed downwards, towards the flank, and were soon pressed against and enjoying the other Luna's ass.

“Most ponies don't think of their wings. Their muscles are strong and forceful, yet sensitive to the touch.”

Luna heard a loud moan, then realized it came from herself. She leapt out of the dream, and the night soon ended.

A few weeks passed, then Luna began her master plan. After failing another date, she came to Celestia's private quarters to complain about her day. Celestia didn't have to ask this time, Luna noticed, as a second cup of tea was sitting on the already-cleared desk when she entered the room. The room always felt small. It was dense with books and scrolls that were not always as neatly shelved as they are now, and the oversized bed always dominated Luna's eyesight. Once the venting was done and emotions had cooled, Luna said

“These stallions don't make sense to me. Today's dating culture makes no sense to me. I need someone to show me how it works. Tia, you've been here forever, you can explain dating in terms I understand.”

Celestia laughed long enough to make Luna second guess herself before replying “Me? Have me explain dating? This is worse than I thought. Flattering diplomats is strictly professional dear sister.”

Glancing at the ground then back to her sister, Luna said “Tia, lets go on a date. Purely practice, I won't feel pressure on a practice date with you. We can go somewhere that nopony can see us, like your royal gardens. Nopony is allowed in there without your permission, so its easy to teach me without anypony knowing.”

Her wide eyes returned to normal and Celestia smirked. ”Lets take things a bit slower. I actually think that is a wonderful idea. A practice date with someone you trust is an opportunity many don't get. Why don't you ask one of Twilight's friends. They are sure to have plenty of experience in such matters. Maybe even my former student could teach you, she has grown a lot in recent years.”

“I am aware of Twilight's growth. But I am set for another casual meeting in two days and I am afraid there is little time to go to Ponyville, have a date on the same day, then return, tomorrow. I know you are free for several hours tomorrow evening.” Luna replied.

Why would I say that, that was a mistake. Too much thought has gone into this.

Celestia looked up and hummed for a moment. Then she grinned. “Why don't you look into your date's dreams. Surely, after seeing that pony at their worst, you will know all about them and feel comfortable.”

Luna's mouth was agape. Before she said anything, Celestia chuckled and assured Luna that it was just a joke.

“I think that a date sounds marvelous. My gardens, tomorrow after I am free. A simple tea and meal.”

When she left Celestia's quarters, Luna grinned.

I knew the teacher-student angle would work

**************************************************************************************

Luna's pace had slowed from her internal reflection. Snapping back to reality, she collected herself and continued down the halls towards the gardens.She paused by a window and, looking outwards to the gardens, thought about the absurdity of her situation.

Did I really set engineer a date with my own sister under the guise of her teaching me?The only one who really knows me, and I am about to break this relationship in the vain hopes that it starts a new one?

Realizing that life is short, Luna continued outwards to the gardens. The weather was warm, and there was a slight breeze. But it was cloudier than what was ideal, and rain was scheduled come nightfall. Not a problem, as they both have tasks to attend to. Luna wasn't sure how what to wear or how much would be too much, instead she opted to wear nothing and spend the extra time caring for her mane.

Luna walked until she could barely see the castle through the trees, and then she saw Celestia. Having already chosen a spot in the grass, Celestia looked up and waved at Luna as soon as their eyes met.

Luna sat next to her sister and said “I am so sorry for being late, I was unsure of how to dress. I decided that I need not to wear anything given the weather as well as due to this just being a practice date. You look lovely today, lovely as ever I mean.”

Before Luna could speak further, Celestia raised her voice.

“I'm glad I wasn't the only one who was worried dear sister. I think it's normal to fret over everything. Please, take a bite out of one of my cucumber sandwiches, I want to know what you think.”

Luna smiled. “I'm your sister, no need to speak so formally to me.”

She is even more nervous than me.

“The sandwiches are great, Tia.”

“But you didn't take a bite?” replied Celestia.

“I don't need to to know, they always taste great. Same with the tea, and the biscuits to go with it that I know you packed. The presentation is great as well, before you ask.” Both let out a small laugh.

“Don't tell anypony, but I used ingredients from the castle kitchen instead of buying my own. A scribe walked by looking for a snack. He had the same idea, and we agreed not to tell anypony.”

Waving her hoof, Luna said “Shame on you big sister! How could you do such a thing. Aren't you supposed to be teaching me modern etiquette! To think, that my own sister would used those nasty ingredients for her date...”
Laughter resumed, then the conversation continued.

Luna had always looked up to her big sister. Celestia was the cornerstone of Equestria and always acted with a fine, graceful control and guidance over her subjects. In her darkest days, Luna hated this element of her sister. Everypony worshiped her and came to her for help. Luna was beloved by nopony. Nopony except Celestia. Truth be told, Luna wanted her sister. Following her return from the moon, she was lost and frightened, and her sister's strengths brought intangible warmth and comfort. The one behind her exile was now the tether that restrained her darkness.

The two ponies continued to talk. Discussing an array of subjects, a stream of words made the conversation as natural and fluid as can be. The pony before Luna had finally let down her guard. Lying on her side, Celestia's foreleg held up her head that was looking to the sky, her other foreleg motioning to go with her story about one of her students. She paused, turned to lay on her stomach, and took a sip of tea hovering right before her.

Celestia was so cute when she acted like herself.

No thought in her movement, no diplomatic body language. The slim body of the princess moved like a giddy school filly. Her sister's body was strong, too, enough that nopony would mistake her for a dainty princess. Celestia took advantage of her lithe limbs and always showed off her powerful form. Nopony could pose like Celestia.

Perhaps that is how she has such as presence

A towering horn, often complemented by a crown, greeted ponies and guided their eyes towards hers. The face of Equestria was inviting, as was the rest of her body. Her wings looked delicate, but showed force when brought forth. Her rump was round, plump, a complete curve, asking to be grabbed and massaged. Celestia's ass was perfect. How Celestia's muscles achieved such a form was a mystery to everypony, but how her fur was sleek and pristine was explained by only sitting on the finest of cushions. Luna decided that her face needs to be there.

Not now

Luna stopped caressing her thigh and shifted her focus towards her sister, who was now moving match Luna's upright position.

“Luna this has been great! It's so rare that I get to talk about my life. Its always boring royal duties. Everything else only comes up when a student's lesson demands it. That reminds me, I almost forgot that I am teaching you. How have you been having any trouble at all when you are such a pleasure to be with?” Celestia asked.

“Most stallions are not as good conversation partners as you. They always discuss boring topics like sports or royal duties, or even worse, previous mares in their life.”

“Well, why is that? Don't tell me you are boring them.” Celestia said.

Before Luna could answer, her sister continued.

“What normally happens on lunch dates like this? What do you try to do, and what ends up happening?”

After a moment, Luna replied “I try to connect with them, and make them connect with me.”

After a few more moments, she continued. “I put on my best attire and care for my every movement. I want my partner to see the best I have to offer. But at the same time, I try to level with them, I try to act how I am normally. Its a balancing act, and I think that paralyzes the the conversation. But its not always my fault. My partners...don't try. They don't always want to.”

Celestia motioned to speak. “If it takes so much work, they are not the right pony for you.”

“But you do it so easily Tia, everybody likes you.”

“I have a thousand years of practice dear sister. And you will notice, I still have no special somepony. Do the meetings go well otherwise.”

“Yes, they are pleasant. I never found myself disliking anypony, but they all end the same, with no special feelings, and no follow up. There was that one Stallion, a big shot musician. He was enamored with me. He even invited me for a special performance at his place. I would hardly call it a date, but by all measures, it went well. I did not accept. He was a great guy, but I felt no connection.”

Celestia did not shine as brightly as before. She was not even looking at Luna, rather she looked to the sky above her. Luna felt a drop on hit her snout.

Oh thank goodness, its just rain clouds. But that means this date is over, and it ended with me souring the mood

“Let's go back inside Luna”

“Yes, lets. It was a lot of fun, I'm sure I learned from you, despite how off topic we got.”

Celestia looked towards her sister. “Hmm? This isn't over yet, we are moving inside, to my bedroom.”

Eyes wide open, Luna asked “What about your royal duties? What about mine? This time was sufficient, surely.”

“Luna, you are more important to me than whatever the court wants. Besides, I think I know how to help you.”

When they entered Celestia's bedroom, Celestia told Luna to raise to moon as she lowered the Sun. “That is the only important task. Now where were we?”

The room was now dark, there was only the light of the moon through a window until Celestia light a lamp and closed the curtains. Purely for show, as both of them had spells to see in the dark. Luna sat at her usual spot by the desk, while Celestia stood.

“What you need to be able to 'push' Luna. Think about your Royal Canterlot voice, although don't use it. If you like a pony, you need to make your intentions clear. If a date lulls, move it along. Perhaps practice by treating them closer to that of one of your subjects in the days of old.”

“Alright Tia, you are my date, how about this: I loved our time together. You lit up my day, how about I give you the best night ever. ” Celestia smiled at Luna's attempt.

I'm a natural. I wasn't lying after all.

The white mare laughed. As she stepped towards the desk, looking at Luna, she said“That is not quite what I had in mind. Let me show you. Stand up.”

Luna stood, she was about to laugh herself. Now at Luna's side, Celestia fluttered her eyes, which Luna matched. “You know how to entertain a mare.” Making her way towards her bed, she continued. “Our date should not be cut short. If you escort me home, I am sure we can have more fun.”

Sitting on her bed, Celestia looked into her sister's eyes. “Tell your date what you want.”

“If I went home with my date after that, I would want to kiss them.” Luna said.

“Then make it known to your date.”

“Celestia, I want to kiss you.”

Both grinned. “Not very romantic. Lean closer, make sure you look into their eyes when you say it.”

Celestia's breath felt warm on Luna's face. Luna thought about her heart beat, then the sweat on her face. Celestia was waiting.

“Celestia, I am going to kiss you.” Both of them moved forward and began to kiss.

The room was near silent, After pulling back, Celestia whispered “What next?”.

Luna motioned to twirl her hair and looked down, but caught herself. She straightened her back, and replied “I want you, I want you to be mine.” Luna's foreleg felt Celestia's shoulder, then worked towards her back. “Tia, be mine tonight”. Her sister showed no signs of resistance as Luna leaned forward and moved her hind legs closer. Luna gently brought Celestia down on the bed. With her body above her sisters, Luna spread her wings.

Celestia spoke. “Fuck me dear sister.”

They embraced eachother, and Luna knew immediately what to do. She performed exactly to her sister's desires and followed every cue from her dreams. Burying her snout in her neck, nibbling on her ear, playing with her hair as she kissed her sister, all the while rubbing every nerve and muscle across Cele back with her wings. Commands and requests quickly turned to gasps. Heavy breathing gave way to panting and moans. Forced into positions she has never been in before, Celestia ached and groaned, but even these turned to pleasure as Luna proved her worth.

Celestia was holding on tightly to her sister, pulling her closer and more firmly with each passing second. When Luna began to tire, Celestia pulled her sister's head to her chest and kissed the tip of her horn. Kissing turned to licking, and licking turned to fellating. This gave Luna time to think.

She had never seen her sister so sweaty before. Not even their fight before her banishment had gotten Celestia so worked up. Celestia smelled good, and through the fur rustled against her face, Luna could hear her sisters heart beating with excitement.

I want to be here forever.

And she waited, embraced by her sister. Luna waited and felt her warmth. Then an idea came to her head.

She lit her horn. The magic gave it the same warmth that Luna now enjoyed. She pulsed magic through it, each pulse testing her sisters boundaries more and more. Celestia seemed to enjoy it.

“Tia, I am going to try something. Bend over.”

Celestia wondered for a second, and before she complied with the order, Luna had already moved her face to Celestia's ass. Luna moved Celestia into position, and she found herself with her face in the pillows, her hind legs on their knees, and her ass slightly lifted in the air. Luna was facing up, right up at her white pussy. Celestia thought she felt a bit of embarrassment.

“I am going slide my horn into your pussy and pulse the same magic through it.”

Droplets fell on Luna's head, and she heard a yes.

Luna grabbed her sister by her flank and slowly brought her hindside down. Celestia shook the second contact was made, but urged Luna to continue.

Her sisters horn pushed deep into Celestia. Deeper than she knew was possible. Her pussy would not stretch wide enough, but then Luna would pull out and insert herself in, deeper with each insertion. And with each insertion it became easier. Soon Celestia's pussy slide down the shaft, and Celestia felt as if she was resisting Luna's pulling out. Her sister's horn never ended, it went into deeper, and Celestia's pussy stretched wider. Then Celestia felt her sister's mane, and the movement stopped.

Then the magic pulsed.

As tame as could be, the pulse still surprised Celestia. Luna pulsed faster, and harder, and each pulse caused Celestia to make a noise. Her entire body felt the magic. Warmth spread throughout her, and the epicenter was her pussy that she could no longer feel. To Celestia, her entire lower body was a throbbing orb of pleasure. She noticed that her legs were pressing against Luna's head, and each pulse contorted them into different positions. She tried to pull away, but her sister sliding out of her pussy created more pleasure.

Luna heard her sisters moans. The whole castle could probably heard her sister's bliss. Luna loved Celestia, and hearing how happy she made her made Luna's heart melt.

Luna stopped pulsing magic, and instead kept a low, warm eminance in her horn. She pulled out, and began to snuggle her face against her sisters pussy, making sure to dance the tip of her horn across Celestia's fur.

After some time had passed, the two cuddled in the bed.

“How did I do, Tia?”

With her head nestled in Luna's chest, Celestia's muffled voice said “As expected of a student of mine, you did everything perfectly.”

Luna grinned.

“And as expected of my sister, you used all the techniques I showed you?”

Luna almost laughed, and asked “What do you mean?”

“I knew you were peeking into my dreams. Dark colors stand out among a meadow. I wanted to bore you so you would never peek again. It didn't work, so I escalated things, and look at where that brought us.”

Eyes wide open, Luna asked “What if it backfired?”

“I know you little sister. Everybody except you knows that you like mares.”

“That's not what I meant, I mean, I am your sister!”

A pause in the conversation occurred. Celestia then said “It was a risk. After losing you for a thousand years, I realized how much I loved you. I never wanted to lose you again, but I couldn't go the rest of our lives without letting you now how I feel. If I never acted, I knew that I would regret it when the day came that I couldn't. I knew that, no matter how you reacted, you would still be safe and I could still protect you. My choice was dangerous, maybe even selfish, but I took charge and made my intentions clear. I love you Luna.”

“I love you too, Tia.”