Celestia rubbed her temples as she waited for her sister to arrive, wishing to have words with her sister because of what had been happening recently. After Luna had stumbled upon her and Twilight engaging in their…“special” activities, she had begun monitoring them like a hawk, walking in on them to talk when they were going to be alone and keeping them from being intimate with each other for several weeks.

It had gotten so bad that Twilight had gone back to Ponyville to get away from the obsessing monarch, hoping that they could come together in their dreams. But this had also proven faulty, for as it turned out, her sister had gained back control over her ability to monitor and manipulate dreams, and it wasn’t long before they felt her disapproving gaze on them, and Twilight promptly screamed something about “crazy night witch” and vanished.

As of today, she had gone almost two months without sex, and it was getting to her in the worst way possible, making her aggravated and causing her to become cross with many of the nobles that bothered her with their senseless dribble, to the point where she had been forced to summon up her doppelganger once again just so that she could get through the day without snapping at somepony.

And so she had called her sister, figuring it was time to put this matter to rest once and for all, if only so that she could get some much deserved and needed stress relief. She finally heard the doors open, turning as the doors closed to see her sister standing there, who opened her mouth to speak.

“Well Tia, what did you wish to talk about that you would interrupt me during one of my meetings with the bat ponies, you know I have important matters to discuss with them correct.”

“I do know that Luna, but the matter I have to talk to you about is more pressing then that at the moment, talks with them can wait, now please, take a seat.”

Luna sat down, at which point Celestia rose, beginning to pace behind her desk as she spoke to her. “Luna, I brought you here to tell you that you must stop nosing into mine and Twilight’s private lives, you have made it impossible for us to get any time to ourselves to that we can enjoy each other’s company, and it is starting to drive me stark raving mad!”

Luna gave her a look, “Tia, I was only doing this to protect you.”

“And what exactly do you think you are protecting me from sister?”

Luna sighed, “I thought that would be obvious, I was protecting you from your mate Twilight Sparkle.”

Celestia stared at her for a long moment, and then she outright cursed. “Luna, I thought we had talked about this already, I wanted her to do those things to me.”

“Yes I heard you, and the Celestia I know would not want those kinds of things done to her, so she obviously has done something to you to make you want those kinds of things.”

Celestia grumbled, “Luna, the Celestia you knew back then is not the pony I am today. That pony was not weighed down by thousands of years of ruling a nation alone when she was meant to rule it by her sisters side, that pony never spent a thousand years suffering self-imposed guilt because she betrayed her sisters all for naught! I am not that pony anymore sister, and thus my desires, my wants would be different then the pony I used to be!”

She was breathing hard, staring into her sisters shocked face as she calmed herself down, sitting down in her own seat before speaking again. “Besides sister, it is kind of hypocritical of you to deny me such things when you yourself have kinks of your own, especially revolving around what you like to do to mares.”

It was a low blow and Celestia had known it, but it got the desired effect none the less, causing her sister blush as she stammered out a response, “That…that is different!”

“And how is that different,” asked Celestia, knowing that she had found her way to corner her sister. “It is a thing that excites you, it is an act which makes the act of mating that much more fulfilling and enticing, and something that you look forward to each night, it is the same as the games I play with my Twilight.”

“But it is different Tia,” said Luna.

“And how is it…”

“Because it’s you!” interrupted Luna, startling Celestia and allowing her to speak some more. “You are my big sister, the one who stayed by my side when the others left to tend to their own nations, you were the one that betrayed all trust with our others sisters so that you could save me, even when it proved foully in the end. To see you in such a state…and knowing that you…enjoy it, it breaks my heart to see it, and thus I cannot bear to…to….”

Celestia got up, walking over to her sister and wrapping her up in a hug and held her close, feeling her shake with tears as she cooed softly to her. “It is ok sister, I know how frightening it can seem, but I assure you, even in my…compromised state, I am the one in control during our games.”

Luna’s crying stopped, and she looked up at Celestia, her face full of confusion. “Control, how could you possibly be the one in control during that scenario?”

Celestia smiled, deciding that now was the best time to explain some of the intricacies of the games she and Twilight played. “Well, before Twilight introduced me to those kind of games, she made me come up with a what’s called a safe word, something for me to say in case things got to out of hoof, or I got to freaked out during our play. So even though she has me in such a compromising position, all I need to do is say that word, and she will work as fast as she can to unbind me and make sure that I am safe.”

Luna looked surprised at this, her face becoming pensive as she thought this over. “I…I had not realized she had gone to such lengths to make sure that kind of game was safe, it seems I owe her an apology for misjudging her intention.”

Celestia nodded, “I know, but before you go apologizing, I need your word that you will not interfere in anymore of our private time, especially not tonight.”

Luna looked surprised, but nodded all the same. “very well sister, I will no longer keep you two apart, now go, I am sure she is…”

There was an explosion beside her, and she looked to her side to see a blazing trail of solar fire trailing from a small pool of melted gold and gems, and she could hear her sister’s lust crazed cackle on the wind, shaking her head as she rose from her seat. “By our mother’s horn, I guess this is why they say “never deny a needy mare her wants.” She then cast a brief spell, smiling as she sensed the familiar presence of Celestia’s doppelganger walking the kingdom. “Ah good, at least she didn’t leave me with all the work again.”

Twilight grumbled as she sat by a lake in the Whitetail Wood, a little annoyed by everything that had happened today. It had all started when she had noticed she had spotted Pinkie moving from cover to cover, and when she had asked what she was doing, Pinkie had told her that her tail had been twitching, which meant that her pinkie sense was telling her that something was about to fall.

This had started a series of events that in the end, had led to several bruised body parts, her body going into a full rage shift, and finally, her reluctant acceptance that while she could not explain it as of yet, she can accept that the Pinkie Sense truly works.

And now she was alone, mostly because combined with the events that had been keeping her form her beloved Tia at the moment; she just didn’t want to be around ponies. It wouldn’t even have been that much of a problem, except that Tia had been to her house that day, apparently only so that she could pick up her friendship report and then leave, which aggravated her to no end.

She sighed, rolling onto her back and looking up into the sky, figuring that like her, the princess was still not ready to take risks as long as Luna was nosing about. But as she thought about this, she saw something appear in the sky, and glanced at it, only to scream and dive for cover behind a log as a raging fireball crashed into the small lake she was next to.

She peaked out from behind her cover, gasping in awe as Celestia broke the surface of the water into the steam above, her main flipping up into the air before being pulled back down onto her back by the gravity of the water. Her mane, and from what Twilight could see her tail as well had changed color, the pastel rainbow colors being replaced by bright yellow, gold and orange stripes. Even her eyes had changed, the rose pink being replaced by shining gold orbs which looked directly at her, burning with a hunger that told Twilight she wanted her, and there was nothing that was going to stop her.

Celestia leaped out of the water, pinning Twilight to the ground and grinning at her as she spoke. “Oh my sweet stallion, too long we have gone without thine touch, but no more shall we be denied.”

“well this is new,” thought Twilight, grinning nervously up as the heat radiating off her lover slowly seeped into her, making her squirm and twitch with her own building arousal as she tried to keep her head strait. “Um Tia…wha…what’s with um, this…” she said, gesturing to Celestia’s mane and tail.

“Nothing my sweet stallion, tis not but a physical manifestation of my urges, long repressed and in need of handling. We promise it will go away once we are sufficiently taken care of.”

Twilight tried not to think of the implications that statement held, and honestly she was starting to enjoy this more…”aggressive side” that Celestia was showing. “Bu…but, what about your sister,” she asked, not wanting to do anything for fear of being caught.

“She will no longer interfere in our pleasures; we managed to persuade her that it was all in good fun. Now please, grace us with the presence of thine heavenly stallion hood, and give us the gift of thine seed, for we are very much in need.”

Twilight nodded, her horn beginning to glow as she thought of the spell, only to stop when Celestia wrapped her mouth around her horn, causing her to cry out. “Tia…st…stop it, I need to concentrate!”

Celestia slowly, agonizingly withdrew her mouth from Twilights horn, looking down at her beautiful face with a guilty smile. “We are sorry my stallion, we just couldn’t resist thine horn, but we shall refrain from doing so again, unless you permit it.”

Twilight nodded again, her horn lighting back up as her thoughts raced. “Well, she still seems to be at least partially submissive, and I have to admit, this heat radiating off of her is really nice. I wonder if this is one of those other kinds of emotion shifts the book was talking abOOOUUT!”

She arched her back as she felt her new length enter her mare’s heavenly folds, the heat of Celestia’s body even more apparent due to having her cock buried deep inside her mare. She opened her eyes, noticing Celestia had her back to her as her mouth hung open in a silent cry of joy, and she finally took the initiative, moving so that she forced Celestia onto her stomach as she started to pull back, grinning wildly as she thrust forward into her.

“OH YES,” cried Celestia, panting hard as she felt her stallion slam into her, looking back to see that Twilight had undergone a shift of her own, Celestia’s shift having sparked her own magic and causing her to change and match her mates lust crazed state. “That’s it my stallion,” she moaned, “Give thine mare what she desires!”

Twilight was all too happy to comply, leaning forward and biting down on one of Celestia’s wings as she kept up her vicious pace, causing the mare to howl with abandon as the pleasurable sensation ran through her body, not even noticing that her howl was scattering the animals around her.

As for Twilight, she might as well have been a beast possessed, for now that she was inside her mare, all that lust and unattended desire was now ruling her, not allowing her to let up as she slammed her thick stallion cock deep within her mare.

It wasn’t long before they began to both feel the buildup of their long repressed release, Twilight increasing her pace even more as her mare moaned below her, so lost in their passion they were. Then finally it happened, Twilight hilting inside her and crying out as Celestia let out a mighty howl of joy, both of them climaxing long and loud before finally collapsing onto the grassy ground below.

Both of them panted hard, their shifts ending and their normal colors returning to their bodies, though Celestia’s mane and tail remained earthbound due to the remaining water. Twilight didn’t even have the energy to pull herself out of Celestia, instead opting to teleport them both to Celestia’s room in the palace and proceed to lock the door with her magic, pulling a blanket over both of them before speaking up in a groggy voice. “I…I think we should refrain from letting that happen again, as much as I enjoyed that, I think the risks involved are a bit too risky to ignore.”

She felt Celestia nod her head, and then heard a snore escape her lips, closing her eyes and then letting herself fall fast asleep.

Author's Note

God that was fun to write, I figured I owned you guys a more complete sex scene after Luna ruined the last one. I promise, eventually, I will give you guys a complete scene of Twilight going full mistress on our beloved Tia, just not yet. As always I hope you guys enjoyed this lovely chapter, and if you guys have any questions or comments please feel free to drop them on by, I love hearing from you guys.