Luna mentally reeled at what her elder sister had revealed. She shifted uncomfortably on her bed. Had Celestia really just revealed what she think she had? Luna couldn’t quite tell. Her thoughts were so jumbled from the mental blow that she couldn’t even form words to reply or even question what had happened.

Celestia, though, was reacting far worse. She was visibly fidgeting with anxiety, sweat forming on her forehead as she waited for Luna’s response.

“W-when… when did this all start?” Luna asked, finally breaking the silence.

The elder mare jumped at the question, as if she had been startled from a bad dream. She laughed nervously and sat down next to Luna, before replying. “I guess I could start with how I ruined my life...” Celestia said weakly. “It was not long after I sent you and that other mare to the moon. Mother was quite upset with my choice and severed my connection to the elements as punishment.”

Luna’s eyes grew wider. “So that is how you could no longer control them… But did that not cause problems with keeping peace in Equestria?”

Celestia sighed and slowly nodded. “Indeed it did… After I lost control of the elements, I began to feel the other mare every time I raised the moon. It made me hate myself. I had banished my own sister to the moon with a monster inside of her and no way to help her. One does not simply recover from the sheer amount of guilt and self neglect I went through.”

Luna placed a comforting hand on Celestia’s shoulder. “If it makes you feel any better, I have no memory of ever being on the moon. Nightm-...” She stopped herself. “The other mare holds all of the guilty memories. I retained very few.”

The sun princess gave her younger sister a thankful smile and visibly relaxed slightly. “Thank you, Lulu… That does make me feel a little better.”

The younger sibling returned the smile. “Tis what sisters are for, is it not?”

Celestia’s smile faded. She looked down at her hands and clenched her fists. “If only I would have been a stronger princess. All of this could have been avoided.”

“Tia, do not berate yourself.” Luna pulled the elder mare into a comforting hug. “The past is behind us. We must worry about now and the feelings you have acquired.” She let go of Celestia and looked her straight in the eye. “Now how did your attraction to me begin?”

Obviously even less enthralled by the new subject, Celestia sniffled, but didn’t shed the tear she was so obviously holding back. “About two hundred years ago, I banned any and all possibilities of a suitor… That was after my mishap with a young mare, named Milkyway. She couldn’t handle my emotions when we were alone, so I let her go and never tried again. After that… I began to miss having somepony around to keep me comfort; to hold me like a lover is supposed to. Then I began to miss you again. With nopony to stop these emotions, they festered like a wildfire and began eating me alive every minute of every day. The simple yearning for your company slowly grew to a dull ache, then a burn. Before I knew it, I was fantasizing about waking one morning to find you naked under my blankets…” Celestia blushed and looked away in shame. “Y-you can guess fairly well what happened next…”

Luna’s jaw had gone slack and her mouth had gone dry. Her elder sister had just admitted to having wet dreams about her. The strange part was… this only quirked Luna’s curiosity. Without her even thinking much about it, a plan began to form in her mind, as well as a backup in case something were to happen.

Luna slowly leaned toward Celestia, her heart racing as she ran the plan through her head one more time. It was now or never. “Tia… Can you tell me about your dream? I want to know what I mean to you.” She whispered into her sister’s ear.

Celestia shivered at the words that rolled so well from Luna’s tongue. She looked back at her younger sister with a surprised expression on her face. “W-what?”

“Tell me about your fantacy, sister. I want to know everything.”

“Why?”

“Because I love you and I want to help you.”

Celestia lost absolutely all control of herself. She suddenly snatched Luna by her shoulders and yanked her into a kiss.

Luna’s eyes went wide with shock at the sudden movement, but didn’t at all fight it. It was as if something was telling her this was right. Everything everypony had ever told her about finding the right pony happened all at once. The fireworks in her head, the butterflies in her belly, the drumming in her heart. Luna’s eyes slowly rolled back as she began to enjoy the contact. Her sister’s lips weren’t at all undesirable after all.

Though none of that changed how wide her eyes still were.

The moment Celestia finally broke the kiss, Luna’s expression was noticed. The elder princess gasped, reeling in disgust at what she had done. “Oh, by the sun, I am so sorry, Lulu! I-I don’t know what came over m-” She was cut off when a blue flash of fur tackled her down onto the bed, pinning her against the bed.

Luna gazed down at her sister with lust in her eyes. She slowly licked her lips as just a tease for what was running through the night princess’ mind. “Now I know why I could never see your dreams. You were holding out on me, Tia. For shame.”

Celestia could only sputter what could only be classified as an attempt to question what had just happened.

The dominant mare giggled. “Oh, come now, Tia. You must know by now that I am quite the fan of most fetishes.” She leaned down and brought her lips to Celestia’s ear. “Incest just happens to be the one fetish that not many get to experience outside of a dream. I quite enjoy the idea of ‘playing’ with my sister after so long without the touch of another pony… But only if you are ready to bite the fruit you have grown.” Luna knew she had Celestia in her hands like putty and it was only a matter of time before she would break.

“L-Luna… Wh-what’s… gotten into… you?” Celestia strained to say. She struggled against Luna, but to no avail. She was trapped with her desires waiting to explode from her in the form of a dirty sin against what she thought was right.

“Oh, nothing quite yet, dear sister. Nothing quite yet.” Luna cooed. “But since you are going to be a stubborn mare, maybe I should give you a preview.”

“Wh-what… do you… mean?”

Luna smiled deviously and placed a binding spell on Celestia’s wrists and ankles. She then grabbed the collar of Celestia’s nightgown and began ripping it down the front.

Celestia gasped, watching helplessly as her clothing was ripped from her body. “L-Luna! That was my favorite nightgown!”

The younger mare only giggled as she undressed Celestia further. She tossed the ruined nightgown away, before proceeding to reach for Celestia bra strap, yanking on it until that too broke. She tossed that aside as well.

With Celestia’s breasts now exposed, Luna could marvel at their bountiful offerings. She licked her lips at them. “Over two thousand years we have spent together and not once have I laid eyes on your naked adult body. Ever since you were of adolescent age, you would hide yourself from me. I now know what I was missing out on.”

Celestia blushed deeply. She was visibly shaking, but not with fear nor anxiety. It was with excitement. Her deepest desire was ripping her clothes to shreds while she was helpless to the lust. It drove her mad with desire and she hated herself for it, but it was Luna herself who was pushing. “C-come now, Lu… We can… work around this…”

“I would rather we face this issue head on, dear sister. I would hate for you to be pent up any longer. Just relax… I do not bite... much.” Luna whispered to her sister, lust heavy on her voice. She then slowly licked up between Celestia’s breasts, making the fur stick up as her tongue trailed across her chest.

The receiving mare whimpered, squirming from the tease. The gentle action caused a wet spot to form on Celestia’s pink panties.

“I can tell I am exciting you…” Luna whispered into Celestia’s ear. “Just give in… We can be so much more than just siblings…” She grabbed both of her large breasts and massaged them for emphasis.

Celestia had to bite her lip to keep from squealing at her sister’s touch. It was becoming too much for her and she knew it. Her will was beginning to falter. With the last of the fight Celestia had left, she mentally cursed herself for having these feelings for her little sister, for being too weak to fight them off.

And with that, Celestia gave in to her feelings. She stopped fighting against the bonds and gazed up at Luna with lustful eyes. “Fine…I give up… I… I need you, Luna.” She panted out, the struggle from before having worn her down.

Luna smiled. She gently brushed her hand across Celestia’s cheek, pushing back a lock of her flowing prism mane. “That is what I want to hear.” She whispered lovingly. With that, the mare began to crawl down Celestia’s hourglass figure and released the binding spell on her ankles. She grabbed the elder princess’ thighs and lifted them, spreading her wide enough to comfortably reach every sensitive spot she knew a mare could have. It was then that she noticed the large wet spot on Celestia’s panties.

“Excited, are we?” Luna cooed.

Celestia bit her lip as she helplessly watched Luna take advantage of her. She quickly nodded, barely able to contain herself, despite the binds on her wrists. It was a struggle not to just break the spell and pound her younger sister herself, but she controlled herself, for the time being at least.

Luna made quick work of Celestia’s final piece of clothing, slipping it over her thick thighs, then the rest of the way down her smooth legs, before yanking them from her hooves. She tossed that to the side with the rest of Celestia’s clothing. With the cloth barrier now removed, Luna could admire her elder sister’s perfect pink lower lips. The sensitive pink flesh was mesmerizing to the point of making Luna’s mouth water.

“L-Luna! P-please don’t just stare at it!” Celestia whined. She wiggled her hips to try and work herself closer to her younger sister, but to no avail.

“Well, what does my dear sister want me to do?” Luna teased.

“I… I want you to make me… c-cum… Lu. P-please make me cum! I need it! I need you! P-please!” Celestia begged, helpless to her sister’s teasing. The suspense was driving her crazy. She needed her sister’s touch, as if she would die without it.

Luna giggled. “Oh… I guess I could do that.” She lightly stroked her hands across Celestia’s cutie mark. “But you have to promise me something.”

“Anything… anything!” Celestia cried.

“I want things between us to stay like this. I love you, Tia. If this is how you really feel about me then do not hold it back. The moment you agree to my terms, I release your wrists and my body is yours to do what you will with me, but if not, I will stop now. I will act as-” Luna was cut off when she felt the binding spell break. The next moment was a blur, but soon she found herself pinned beneath a lust driven Celestia.

“I agree you your terms, my sexy little sister.” Celestia slowly ran her tongue over her lips.

Luna blushed deeply, a squeak barely leaving her lips.

Like the sex starved princess she was, Celestia went to work quickly. She dove down and began nibbling Luna’s neck as she began tearing off her clothing, just as Celestia’s had been.

The night princess could only squeek and moan as she was taken advantage of. It wasn’t long before she was lying there naked, but she didn’t care. “T… Tia…” She moaned. “Take me…”

“Gladly…” Celestia whispered heatedly into the younger alicorn’s ear. She slowly began kissing down Luna’s slim body. First, her supple breasts, making sure to take the time to suck and nibble each nipple. Then her smooth stomach, where she playfully licked Luna’s belly button. Then finally just above princess’ tender clit. “When I’m done with you, you will eat me out until I tell you to stop. Understood?”

Luna quickly nodded, biting her lip to stifle her excited whimpers. She could feel Celestia growing closer to her ultimate prize and she grew hotter the close she came.

Then it finally happened. Celestia finally placed her lips against Luna’s tender love nub and sloppily kissed it. Suddenly Luna gasped, euphoria spiking through her system.

“Oh? From just a kiss? My, Lu. You may need this more than I do.” Without warning, Celestia dragged her tongue along the moist slit. It was teasingly slow and Celestia enjoyed every second of it.

Luna was hysterical, the teasing lick making her squeal with pleasure. She clawed at the sheets of her bed, unable to control the noises she made. She felt like a virgin again and she loved it.

Celestia grabbed Luna’s thighs and spread them, before diving right back. She began lapping skillfully at Luna’s tight folds, knowing exactly what parts were the most sensitive. With each time her tongue made contact, she was overwhelmed with desire for her younger sister, the forbidden taste making her lose all sense of control.

The receiving mare was in such a state of bliss from her sister’s actions that she could no longer even speak. Her loud and needy moans began to fill the room as their moment continued. Oh, by the moon, why hadn’t they ever done this before? The other mare would have never existed if this was how their relationship had been a thousand years ago.

Luna squealed in bliss when she felt Celestia’s skilled tongue slip between her tender lips and grind against her walls.

Celestia greedily slurped at her sister, not wanting to miss a single inch of her delicious offerings. The sweet nectar that leaked from the pleasured mare was but fuel for the burning flames of passion that raged within the elder mare.

She pulled apart Luna’s tender lips with her thumbs and thrust her tongue deeper.

The night princess squealed even louder. It had been so long since anypony had touched her that just a few moments of foreplay brought her dangerously close to her climax. Her sensitivity to Celestia’s movements spiked, her desire for her elder sister strengthened, and her utter need for a sweet release took her mind by force.

Celestia’s tongue felt amazing to Luna, the way she licked and slurped at her insides was like anything she had ever felt before. A thousand years of skill made an absolute difference and whoever said otherwise could kiss her big, round full moon.

Celestia pulled her tongue out and began licking at the tender lips themselves.

Oh, how that drove Luna crazy.

As Celestia circled her tongue across the tender flesh of the tight opening, Luna reached her peak. And as the sun princess reached her goal, Luna was shot straight to cloud nine. The night princess came like a dam bursting at the seams. Her pent up juiced squirted out of her, soaking Celestia’s lips and tongue in her juices.

The sun princess pulled away, licking her lips. “That was quick, Lu. Don’t tell me you haven’t slept with anypony since you’ve been back from the moon.”

Still unable to speak past her panting, Luna just shook her head no.

“Awww. Poor Lulu. So you’ve been pent up too.” Celestia crawled back up Luna’s slender form and lied on top of her. “I guess I could let you off with giving me just one orgasm. Then we can sleep.”

Luna narrowed her eyes at Celestia. “Tia, this is not your dream. Can this not be two sided? Being on top does not put you in control.”

Celestia raised an eyebrow. “What do you mean?”

“Listen to yourself, Tia. You sound as if you are speaking to a possession. Calm yourself.” Luna replied. “How about we switch places again? A moment ago you were begging for your own release, were you not?”

The sun princess blushed. “Oh… Of… Of course.” She backed off of Luna and let her sit up. She was caught off guard when Luna kissed her, while her lips were still covered in mare juices.

“Thank you, by the way. I know I do not have to, but…” Luna trailed off.

“It’s I who should be thanking you. You did come onto me, after all.” Celestia giggled. “I would have stayed away forever.”

“No you would not have. I know you and I know how you act when it comes to things like this, that and cake.”

“Oh…” Celestia looked away.

Luna sighed and shook her head, before pushing her elder sister down in the spot she had previously been. She then lied down on top of her. “Just relax, sister. This is supposed to be fun.”

Celestia blushed. “S-sorry…”

Luna leaned in and caught Celestia’s lips in a gentle kiss. Nothing lewd or French, just a gentle kiss one would receive from a first kiss. It was sweet and passionate and it made Celestia’s heart flutter.

After a moment, Luna pulled away with a light blush of her own. “Tia, there is nothing to be sorry for. I said relax and I meant it.” The princess slowly trailed her index finger down Celestia’s stomach, before slightly rubbing the tender, wet spot between her legs.

Celestia bit her bottom lip and let out a soft whimper, the tease making her even more wet.

“Does that feel good, sister?” Luna whispered heatedly to her sister. She slipped her middle finger into Celestia’s wet slit and worked the digit in small circles. “I bet it does.”

“L-Lu, ahhh… P-please stop teasing me… I-I… I want to cum…” Celestia pleaded through her light panting. She could feel the heat in her body rise from Luna’s movements, the pleasurable teasing was only exciting her even more.

Luna giggled and gave Celestia her most lusty bedroom eyes. “Well, I do believe I asked you this question before, Tia. What does my big sister wish of me to do to her?” She slipped a second finger into Celestia’s soaking snatch to add emphasis to the question.

Celestia moaned as she felt another digit penetrate her. It took every ounce of her willpower not to beg for her release. “I… I want you to eat me out… relentlessly… I want your tongue… inside me so badly it hurts...”

“Your wish is my pleasure, dear sexy sister of the day.” Luna pulled her fingers out of Celestia’s soaking wet sex and slipped them into her mouth. She made sure the sun princess was watching as she sucked the sweet arousal from her own fingers.

Celestia’s mouth went dry as she watched the dirty display. Oh, how it toyed with the princess that Luna could so easily excite her. Her breathing began to quicken as she watched Luna grow slowly closer to her ultimate prize.

Luna gently pushed Celestia’s thighs appart, fully exposing her wet lips to the night princess. She licked her lips at the delecacy. “I have heard rumors about how you taste like vanilla, dear sister… I had no idea they were true.” Without so much as a warning, Luna dove in for the kill.

The sun princess squealed in bliss, much like Luna had, and for good reason. The moment Luna’s tongue made contact with her tender lips, the wonderfully warm and textured muscle slipped inside of her. She could feel Luna grinding it against her tight walls. She could feel her searching for every weak spot. Oh, by the sun it was amazing.

Luna pressed her mouth against the tight lips and slipped her tongue inside as far as it would go, before working it in circles. The superior trained muscle and Luna’s constant exposure to dreams and fantasies of ponies gave her, by far, the greatest sexual advantage over her sister.

Celestia’s hands flew to the back of Luna’s head and she pulled the younger mare firmly against her snatch. Her fingers were entangled with the night sky-like ethereal mane as she was skillfully eaten out. It had been nowhere near as long for her as it had been for Luna, but she was still pent up beyond belief.

“Fuck, yes! M-make me cum, Lulu! Ahhhh!” She helplessly screamed in pure, white bliss as pleasure stormed Celestia with a downpour of euphoria. There was no way she was going to last long at all and she knew it. She didn’t even want to hold back.

Luna slipped her tongue out of Celestia’s slit and began licking sloppily at the tender clit. Oh, how Celestia’s screams of pleasure excited her; drove her on. She suddenly latched onto the pink pearl and sucked hard on it.

This caused Celestia to lock up. Her screams filled the room with the sounds of a pleasured princess as she was pushed over the edge, sending her into one of the strongest orgasms she had ever had. Her thighs clamped down on Luna’s head as a torrent of Celestia’s love juices squirted into the night princess’ mouth, spilling past her lips.

The night princess gladly swallowed down every bit of mare cum that she could. What she couldn’t spilled onto the bed.

It was a long moment before Celestia’s orgasmic spasms finally stopped and her thighs released Luna from their death grip. The sun princess herself could, as of right now, only stare blankly up at the ceiling, her breathing came in winded panting. She felt somepony press their body against her side and wrap their arms around her.

“How was it, sister?”

Celestia looked to her left to find the pony had been Luna. It took a few moments for her blitzed senseless mind to catch back up with her and a deep blush warmed her cheeks once it had. “I… I loved it, but… We really did that… Lulu, we had sex. I just… I mean… I don’t know if I’m supposed to be upset about it or completely overjoyed.”

Luna placed a finger against Celestia’s lips. “Shhh… Do not speak of that now. Let us sleep and we shall deal with it when we wake.”

Celestia sighed, but nodded in agreement. She too wrapped her arms around her younger sister and pulled the blanket over them both. Then she extinguished the magic candle lights with a quick counterspell.

That night, was the best sleep Celestia ever had.

END

Author's Note

Now before you say anything about it, yes I know neither Celestia or Luna lasted very long in the clop, but I did the best I could. I had just recently gotten over writer's block and decided to use my flash of inspiration on this chapter. I honestly liked the way it came out, but you ponies might have a different view.

If you have a better way of wording any of what I've written, please PM me. Don't leave it in the comments.