This chapter contains incest and rape, please take caution.

Luna let out a sigh as she slowly sank into her bed, it was just past sunrise and she was exhausted. The nights really took a toll on her, and she decided to look through her new collection of books for ideas on how to relieve her stress. She had borrowed all sorts of books from Twilight's "private" collection - it had taken a lot of prodding, but it finally happened. There were so many more things to do than she realized, and she was savoring every word she read. As she read, she suddenly stopped and a pout came across her face. It seemed like the stallions got to have so much more fun than mares ever did, how the princess wished she could experience the other side of the fun!

She stopped and gasped, digging through the sizable collection of books strewn about her bed. Finally towards the end of her desperate search - the book she had been looking for came into view. It was a book filled with all sorts of special spells and potions that were usually used for more questionable activities... it wasn't a very widely circulated book for obvious reasons - So she was quite pleased that Twilight had one of the very few copies in circulation. As she pawed through the pages, her mind began to wonder who she would like to have this experience with. Suddenly, it hit her like a ton of bricks. The smile quickly spread across her face as she realized just the mare she wanted to try out her new tricks on - Celestia. What better subject than her precious older sister?

It would be a hard scheme to pull off, but it would definitely be a lovely pay back of sorts for all those years of banishment. The hardest part of course would be getting her into place.. After all, her older sister had magic far superior to her own. Anxiously flipping the pages of her book once more, she squealed with delight as she came across the perfect potion to get the job done. Making the potion would be no problem at all, it was something she had always excelled at actually. The largest problem facing her would be slipping the substance to her sister. However it didn't take long to devise a plan, after all her sister very much enjoyed her afternoon tea. With a smirk, she slipped away to gather what she needed to put her plan into action.

As the two sister settled in to enjoy their afternoon tea, Luna glanced around at all of her sister's guards standing watch. "LEAVE US! WE HAVE IMPORTANT MATTERS TO DISCUSS WITH OUR SISTER!" She boomed in her best Traditional Royal Canterlot voice. The guards stood baffled for just a moment, before Celestia gave a nod of approval.

"Go guards, rest easy while I am with my sister. Leave us be to enjoy our tea - we can survive for a bit without your watch." Pausing momentarily, the guards shuffled out the door as Celestia moved her head towards the door to signal their leave once more. "So what is it you wanted to discuss, dear sister?"

Luna smiled sweetly at her sister, pretending to pour more cream into her tea and stirring it with a glow of her horn. "I just get rather anxious with so many guards standing around, Celestia.. Sometimes it's nice to just be alone with you for a little while." She was using all of her strength to keep her smile at an appropriate level - while he sister was paying attention to the guards, she switched the creamer with the potion she had made up.

Sipping her tea, Celestia thought only momentarily that it tasted different than usual - But it was quickly displaced in her mind, it must of been in her head. "I can see what you mean, it does sometimes get.. a bit.." her eyes suddenly felt very heavy, and the room started to spin around her. "Closed around... he..re..."

Before she could make a sound to alert anyone, Luna quickly caught Celestia with her magic. What a delight! She hadn't expected the potion to take effect so quickly, but it certainly saved her a lot of small talk. Without missing a beat she quickly cast a spell to soundproof and secure the room - she didn't want anyone interrupting her fun. There might be consequences after it was all said and done... but the princess thought for certain that her sister would enjoy it once given a chance.

It took a few minutes for the last spell, as it would be the hardest of all. She temporarily sealed her powerful sister's magic - everything would come to a halt if she took control of the situation. It would only last about an hour - which was all the time she needed, plenty could be done in that amount of time! Not to mention much longer would get the guards suspicious as to what they were up to.

After catching her breath, Luna tugged a bag out that she had stashed under the table. She roughly pushed everything aside on the table, and lifted her sister's body on to it. A rope was secured around Celestia's wings to keep them in place, and a spreader was attached to her legs on the ground to keep them apart. With a bit of magic to help, Luna attached the shackles to the table and swiftly locked her front hooves in them. Everything was timed quite well, as the small dose of potion began to wear off.

Everything slowly began to come back to Celestia, and she groggily opened her eyes and peeked around. "W..what's going on..?" Managing to focus in on her sister whom was standing across the table. "What have you done to me Luna?!" The mare now quickly came to, starting to struggle against her bonds. Seeing how well she was secured, her horn lit up for a moment - but created no more than a small spark and fizzle.

"Don't worry sister... we won't hurt you. We just want to share all the fun that has been discovered to us recently!" Luna's grin cracked across her face from cheek to cheek - she was simply so excited for what was going to come next. "We have a very special surprise for you, we saved the best spell for last..."

Luna's horn quickly lit up, closing her eyes to concentrate on the spell. It was a bit harder than she expected, but soon enough she began to feel a strange tingling in her loins. The mare let out a slight moan as she felt her new assets coming in - a set of balls and sheath was growing out of her lower body. Panting, she craned her neck to see what had happened and immediately smiled triumphantly.

"See sister! This is going to be so much fun, just let us show you.." wasting no more time, Luna quickly moved to the other side of the table and behind her sister. It was odd feeling her new sack thumping against her belly and thighs as she briskly made her way around the table - but at the same time, it felt quite wonderful. She felt herself getting excited already, a new sensation rushing over her. Reaching the other side, Luna used her horn once more to lift aside her sisters tail and levitate a rope to tie it around her waist. Without any warning, Luna shoved her face close to her sister's marehood. Breathing in deeply she took in the heavenly scent, even though she wasn't excited yet it still smelled as wonderful as she had hoped.

"What.. what are you doing?! You're mad Luna - simply mad! You can't do this to your si-" one quick, final burst of magic shoved a ball gag into her mouth, leaving Celestia completely helpless to her lustful sister.

Having silenced any protests, she moved back towards her soft vulva. Her muzzle gently parted the folds as she stuck her tongue out to lick carefully along the soft organ, only taking a few moments of caressing before she began dripping juices from her hot mound. Luna eagerly lapped up the warm liquid and was delighted with how sweet it tasted, greedily pressing her muzzle and tongue further to coax more out. She was enjoying herself so much she hardly noticed as her new shaft slipped outside of it's virgin sheath, dripping a few small drops of precum onto the ground. She dove in as deep as she could get, rubbing her tongue along the inner walls of her sister. Soft and muffled moans crept through her mouth, quickly being matched by her sister's involuntary and muffled noises.

Slowly and hesitantly she withdrew her muzzle, growing more aware of the burning she felt between her legs. Just as she was starting to get curious as to what she should do first on this test run - it was quickly drawn to attention that the small, perky nipples underneath Celestia's belly were growing quite hard. Despite the weak struggling and poor attempts to resist, she was obviously enjoying this experiment. Luna figured a small detour wouldn't hurt... the guard hadn't explored this area earlier on her first test runs, so why not give it a shot? With one swift motion, she was under her sister nibbling and suckling on her hardened nipples. This evoked a few louder muffled moans as Celestia was quite shocked at this move. Luna didn't take too much time to test out this new area however, she was growing more aware of her throbbing manhood below her. As much as she was enjoying the squirming and muffled sounds it really wasn't worth it to jeopardize her fun - After all, wasn't that what mattered the most? She needed to discover how it felt to be on the other side of the fun.

Bringing herself back up, she took a quick lick of her sister's dripping pussy before making her way to the other side of the table. It was a rather short table, they usually used this one for tea time as it was quite silly to use a large table when there were only two people seated. This quite worked out to Luna's advantage though, and she eagerly brought her front hooves onto the table with a thunk. Quickly ripping off the ball gag as though it was a band-aid, Luna gave no time for Celestia to protest before she shoved her member into her sister's mouth. The warm, soft area felt heavenly to her throbbing head - it was even more amazing than being on the other end of things. The sister gave a feeble protest to the object forced into her mouth, but was only met with one of Luna's hooves on the back of her head - forcing the large member further down her throat.

Celestia squirmed as the large, thick cock was forced down her throat without much warning - gagging slightly as her natural reflexes tried to reject the foreign object. However the motion of the gag reflex only made Luna feel better, and she let out a moan of delight as she finished shoving it as far as she could. Her manhood throbbed happily, and she felt as though she might burst right then. She really didn't want to finish just yet though - things had only just begun. So the princess sat for a few moments with it buried deep into her throat. Celestia's gagging died down for the moment, so she strained her eyes upward at her sister. A few tears were beginning to form in the corners of her eyes. As their eyes met, a wicked grin flashed across the dark mare's face and she quickly pulled herself nearly the whole way out. Much to her sister's displeasure, she immediately rammed the entire length deep down her throat once more. As Celestia gagged on the object being forced down her throat, tears rolled down her cheeks - she really wondered what could she of done to her precious little sister to deserve this. Was this even her baby sister anymore? She really wasn't sure who this was.

Luna bucked her hips at an increasing speed, moaning as she reached her peak at a rapid rate. It didn't take long before she rammed her member all the way down Celestia's throat one last time, letting out a squeal of ecstasy as her head flared and she poured her huge load down Celestia's throat. Her sister could only sob as she was forced to swallow the cum that ran deep down her throat, nearly directly into her stomach. The younger sister simply stood in bliss for a few moments, enjoying the waves of pleasure swarming through her body. "You know sister... if you keep your protesting down, we won't put the gag back in you." She chuckled softly as she lowered herself down off the table, her half-hard member slipping out of her sister's mouth with a shlicking sound.

The white mare gagged and coughed as her throat was finally freed of the large obstruction, but she dared not speak for the moment. Protesting seemed like a waste of time ay this point - it would probably only upset her sister and cause her more trouble. However, she was already plotting out ways to punish her disobedient sister once this whole ordeal was over. Perhaps she needed some time alone on the moon again? Celestia wasn't quite sure, and wasn't given too much time to think either.

Trotting back over to the opposite side of the table, Luna leaned in to take a look once more at her sister's lovely pink pussy. She slowly drug her tongue along the outer lips, taking in her heavenly scent again. The smell and the slow trickle of sweet nectar dripping was enough to send the dark mare's member back into a fully hardened state. In one swift motion, she lifted herself on top of her sister's back and pressed the tip against her soft walls. "We hope you will enjoy it as much as we are sure we will.. your moans will only help us along. Unless perhaps you want the gag back in place?" She snickered at her sister's meager whimper, the white mare having lowered her head in defeat.

Luna pressed the tip of her hardened cock against her sister's tight pussy, her eyes rolling back with a moan as she felt the tight walls begin to surround her. Being as old as she was, Celestia certainly wasn't a virgin - but it had been quite some time since she had done anything with somepony. The light mare let out a screech of agony and defeat as her well-endowed sister rapidly pushed deeper inside of her. It was a bit of a hard push, but it only took a moment for Luna to get balls deep inside of her sister. She panted for a few moments, simply feeling the twitching of Celestia's inner muscles protesting against the forced object. She knew her sister had to be in denial about not wanting it though, she was very wet - a small puddle of their fluids was forming beneath them. Gritting her teeth, Luna pulled out her cock once more and rammed it back in as hard as her hips would allow.

Each thrust led to Celestia letting out a combination of screams of agony and pleasure, obviously in great turmoil over the situation. She certainly shouldn't be enjoying it... right? But even the elder sister couldn't help but revel in the wonderful feeling in her loins. Maybe this wasn't so bad, maybe Luna didn't need to be punished... But just as her mind started racing, Luna forcefully pushed her sister down onto the table in an effort to ram her member harder and deeper inside. The moans coming from the white mare were purely that of pleasure now, feeling a sensation building up inside of her as she was rapidly reaching her peak.

Both mares moaned loudly in unison, overwhelmed with the wonderful feelings coursing through their body. Celestia was the first to break, a final high-pitched moan echoing throughout the room as her muscles clamped down upon her sister's cock. Luna managed one final, deep thrust before she felt herself being clamped down upon by the inner muscles. As they rapidly contracted around her, she lost her focus as well - leaning heavily against her as she once more came to a climax, this time spilling her seed deep inside of her sister's pussy. They both panted heavily as their combined liquids leaked out at a rapid pace, a rather sizable puddle having formed underneath them. Slowly, Luna's cock slunk back into it's sheath - making wet sounds as it slipped out of her sister. The darker mare slunk back onto the floor, pleasure still flooding through her body. Slowly her spells began to wear off, her new equipment disappearing - and her sister being freed from all of her bonds. But she was too overwhelmed to take note of her elder sister rushing towards her.

"YOU!" exclaimed Celestia, rushing over to Luna and shoving her face close to her sisters.

Luna finally began to panic, having not fully thought through the plan. "I... I... We..." she trembled and slunk lower and lower, hoping to just disappear into the ground. But just as she attempted to speak once more, she was silenced by her sister kissing her passionately and deeply. Luna sat dumbfounded for a few moments, attempting to process what was happening - but really not coming to a conclusion. She had just forced herself upon her elder sister.. and now she was... kissing her? This certainly wasn't in her plan, but as her mind caught up she quickly began returning the kiss.

"Clean up this mess, sister. I'm late to meet Twilight Sparkle - I'll deal with you later." Without another word, Celestia left the room - leaving a dumbfounded Luna sitting near a puddle of bodily fluids.

Author's Note

Feel free to post your wishes for further chapters! It was a comment to the first chapter that inspired this one after all.. :)