"Princess!"

Celestia smiled. She knew that voice well.

Turning in the castle courtyard, her smile only grew wider.

Her student (former student, she had to keep correcting herself—old habits died hard) came running up. She'd grown so much over the last few years. When they'd first met, Twilight had barely reached her knee. Now, she was almost as tall as she was.

They embraced.

"It's wonderful to see you, Twilight," Celestia said. They pulled apart after a moment. "Thank you for volunteering to help with the Summit. I must confess, it's been so much more overwhelming this year than I remember."

"I'm glad I can help," Twilight replied. "Anything you need, just ask."

"I appreciate it. Come; let us go inside."

They started down the green-lined path through the front gardens towards the entrance to the castle. As they walked, Twilight seemed to notice something.

"What's that, princess?"

Celestia glanced down at what Twilight was pointing to. "Oh, this?" she said, grasping the eclipse-styled pendant that had been bouncing across her bosom in her hand. "It was a gift from Luna."

"Oh. I like it," Twilight said. "Is it enchanted?"

Celestia quirked an eyebrow. "No, I don't believe so. Why?"

"I can sense magic on it," Twilight said. "Powerful magic. Don't you?"

"No..."

"You're sure Princess Luna didn't mention an enchantment?"

"No, I'm... quite sure," Celestia said. "Perhaps it's just a preservative charm? To keep it from tarnishing."

Twilight shook her head. "No, this feels like... transformation magic. Could I—"

"Twilight Sparkle!"

She jumped at the sudden utterance.

They both looked up. They'd made it to the steps up to the main entrance to the castle; standing framed between the doors was Princess Luna in a long, black dress, looking down at them with amusement.

"It is good to see you again, Twilight. It has been some time."

"Princess Luna!" Twilight smiled. "It's good to see you too. How have you been?"

"Just fine," Luna said. "Just fine. And you?"

"Oh, I've been alright. Busy, as always. Oh, but I'm excited to help!"

Luna smiled. "Oh, I'm thankful for it. Shall we get to work?"

"Teatime, dear sister."

Celestia froze. Immediately, a heat rushed into her cheeks. She felt herself begin to get aroused, just at the anticipation as memories flooded back into her conscious mind.

It terrified her.

Luna's tongue darted across her lips. "Welcome back, sister. Are you ready for today's lesson? Because I can assure you, I've been eagerly awaiting it."

"Twilight is here, in the castle," Celestia said. "She'll put a stop to this. I have faith in my student."

"Will she now?" Luna purred. "Well, we'll just have to see."

Out came Luna's bag of tricks. Out came the latex gloves, as well as some... other things. Luna slipped the gloves over her hands; as always, they felt amazing. A pity she couldn't wear them all the time; hiding them with illusion magic was easy, but any change in behavior at this point could jeopardize everything she'd worked for... not to mention, Twilight Sparkle was around now; whether or not Twilight would be able to see through any spell she wove was not something Luna wanted to find out.

That said, Twilight was confined to her tower for the moment, preparing for the Summit. Luna admired the enthusiasm the mare had for her work, and it would come in handy today.

Because today, well... today she'd be taking Celestia on a little trip.

"Strip for me, dear sister."

Off came Celestia's dress. Still no panties or bra, Luna noticed. That was interesting; she hadn't ordered Celestia to do that. She smirked. It seemed her lessons were truly being learned well and deeply.

She slipped an inhibitor ring over Celestia's horn. She shouldn't have needed to, but just to be on the safe side.

Luna draped her arms over Celestia's shoulders from behind. Her hands slid over Celestia's front, the cold, liquid slipperiness of her gloves a sharp contrast to her warm breath on her ear.

"Your body belongs to me, sister," Luna said. Her fingers danced playfully across Celestia's skin, edging ever closer but not quite reaching her breasts. "Isn't that right?"

"Y-yes." Celestia's cheeks flushed harder at the contact between them.

"Mine to do whatever I please with?"

"Yes."

Luna leaned forward and gave the edge of Celestia's ear a little nibble. Her clothed breasts pressed into Celestia's bare back, and for a moment Celestia could feel her sister's heartbeat.

"Then I think," Luna said, "It's time we showed that gorgeous body off a little, don't you think? But first, some... ornamentation."

Luna stepped back. "Stand for me, dear sister."

Celestia stood. A light breeze blew by; she shivered as it chilled her naked form, crossed her bare nipples, caressed her traitorous cunt, already damp in anticipation of whatever Luna had planned.

It did not occur to Celestia to attempt to run, or to fly. That hope had already been extinguished. No, her only hope now was for outside intervention.

Her only hope now was for Twilight.

"Now sister," Luna said, "I know you like your jewelry, so I've prepared something extra special for today."

She brought a series of items around in her magic for Celestia to see. They were various gold bangles, of varying sizes.

"Let me help you get dressed, dear sister. After all, we wouldn't want to disappoint your... subjects."

Celestia's mind whirled at that last word. She couldn't possibly mean...?

Her thoughts were interrupted as Luna clasped one of the smaller gold rings around her nipple.

"A-ah," Celestia uttered, as the metal clamped down upon such a sensitive spot. It was cold, and from it dangled a small jewel that swung listlessly.

Luna grinned, and attached the ring's pair to Celestia's other nipple. They squeezed down, forcing the tips of each teat out. She gave the hanging jewel on this one a tug for good measure; the ring stayed firmly attached.

Next came a pair of anklets, wide and golden, with floral patterns stamped into their sides.

"I had the castle's finest artisans prepare these," Luna said, as she clasped them shut over her sister's ankles. "Only the best for you, sister."

Finally came a larger band of pure gold, laid again in a floral pattern, that Luna slid up Celestia's right leg, stopping just below the edge of her cutie mark. The ice-cold touch of the metal pressing against her inner thigh made her shiver and flush at the same time.

"There we go," Luna said, standing up. She surveyed her work. "You look wonderful in your new arrangements, don't you think, dear sister?"

"Y-yes," Celestia said. They were very pretty...

"Just a little more," Luna continued, "and then we'll be ready."

Out came a pair of leather cuffs, connected by a short chain.

"Present your wrists, sister."

Celestia did so. The leather slipped over her wrists, and Luna pulled each cuff tight before buckling them in place. Celestia's wrists were bound together; she couldn't move them more than an inch apart.

"And finally," Luna said, reaching forward, and with one gloved finger, she tapped the moon on the necklace that even now hung from Celestia's neck. It morphed and changed, reverting back to the leather collar it had started out as. The symbol of Luna's domination over her sister.

To the ring on the collar, she attached a longer silver chain. She stepped back, letting the metal slip through her hands until she was about a meter away.

She gave the chain a yank. With a cry, Celestia was forced to take a staggering step forward. Luna grinned.

"All right, sister," she said. "Now we're ready to begin today's lesson."

With another, more gentle pull of the chain, Luna beckoned Celestia towards her, until they were just a foot apart. Luna reached forward, traced a latex-clad finger around the ring on Celestia's right nipple, just barely touching the surface of her erect teat, but it was enough to put further color into Celestia's cheeks... and further heat into her nethers.

"You belong to me," Luna said again, "isn't that right, sister?"

"Y-yes... nng..."

"Then you are my property," Luna observed.

"Yes."

"Mine to do with as I please."

"Yes."

Luna reached down with her gloved hand, ran a finger slowly up her sister's moist slit. She shivered.

"Anything I want?"

"Yes, sist—ah!" Celestia let out a little squeak as Luna's finger reached her clit.

"Then that includes," Luna said with a smile, "displaying you, correct?"

"Dis-dis-displaying?" Celestia stuttered, as Luna pressed her finger against her most sensitive of places.

Luna chuckled. "Yes... displayed. What is obedience, sister?" She quickly rand her finger in a circle around Celestia's clit.

"P-pleasure... ooh..."

"Then what is to show off that obedience?" Luna asked her. "To display your obedience? Well..."

She flicked her finger upwards.

"That too, is pleasure, isn't it, dear sister?"

"Ah! To be displayed is... pleasure?"

Luna smiled. "That's right, dear sister. To be displayed is pleasure."

She stepped back, a trail of marecum following her finger. She raised it to her mouth, licked it off.

"Come, sister... let's show your subjects who you really are."

And with that, she took the chain in hand once more, leaving a decent length between her and Celestia's collar, and turned towards the door.

"W-wait," Celestia gasped. "You can't possibly—"

"Oh, but I can, sister. And I will."

Luna reached forwards, grabbed the doorknob, and pulled the doors open with a flourish.

"After all," she said, "You can't be late for morning court, can you?"

Luna intended to bring her before the court? In this state? Celestia's nethers grew warmer, unbidden, but in her mind she was panicking.

But... wait. Wasn't that a good thing? It meant everyone could see her—see what Luna was doing to her. Yes, that was it! Her salvation!

"Guards! Guards! Help!" Celestia shouted, with all of her breath. "Help! Quickly!"

They waited a moment.

No help came.

Luna smiled. "You're going to have to try harder than that, Celestia. Now, come."

She pulled on the chain, and began to walk, Celestia stumbling at first behind her, then catching her footing,. They passed through the doorway... and past the pair of guards situated on either side of them.

"G-guards?" Celestia said, looking at their faces. Neither seemed to pay her any mind, even as she was dragged away by Luna.

On they went, through corridors and passageways, past guards and servants. Celestia's eyes darted to each of them in turn, hoping for nothing less than for one of them to see what was happening, to scream, to at least look embarrassed. But no, their eyes glanced over her, as if she wasn't even there.

Which to them, she wasn't. Little did Celestia know that Luna had already cast a spell over her; a simple notice-me-not cantrip that prevented anyone else (aside from perhaps Twilight Sparkle) from paying any notice to her, or her predicament, or Luna talking to her. Luna let out a little chuckle at her sister's desperation.

"You've done something to them," Celestia accused her.

"I've done no such thing."

"Then you've done something to me," Celestia said. "An invisibility spell?"

Luna laughed. "Oh, you aren't invisible, sister. They can see you just fine." Technically true; the notice-me-not didn't affect their sight, just their perception. A devilish smile played across her face. "You can feel their eyes on you, can't you, dear sister?"

Celestia's eyes widened, because all of a sudden she could feel their stares. That prickle at the back of her neck—had that been there a moment ago? And suddenly her entire body felt warmer. Heat blossomed in her cheeks.

But...

Why was part of her happy to be looked at, in this state?

It must have been because it meant someone might be able to help her, Celestia rationalized. Yes. That must be it. She shook her head.

And meanwhile, her cunt dripped onto the marble floor below.

And all the while, Luna smiled.

After what felt like an age to Celestia (and far too soon to Luna), they arrived at the entrance to the throne room. Gaurds stood to either side.

"My sister has asked me to fulfill her duties in court for the day while she works on the preparations for the Solstice Summit," Luna said.

"Very good, ma'am."

They opened the doors for her, and she entered, Celestia trailing behind on her metallic leash. Luna lead her up the steps to the throne, which she sat upon, Celestia's chain never leaving her hand.

"Lay at the base of my throne like a good pet, dear sister. Hands and knees."

Celestia did as she was told, kneeling on the hard marble, head down.

Smirking, Luna stretched out her legs and laid them on Celestia's back. The heels of her sandals bit into the space between Celestia's wings, and Celestia let out a little grunt.

"Ahh," Luna said. "It feels good to put your feet up, doesn't it, sister?"

No response. Luna frowned. She ground her heels harder into her sister's back.

"Ah! Y-yes, sister!"

Luna smiled again. "Much better."

She turned to the guards by the door.

"Send in the petitioners," she commanded.

The doors opened, and Celestia could see the line of ponies outside the door. The first group, a pair of stallions, was ushered forwards. Celestia looked at the first of them, hopeful.

His eyes passed over her, as if she were a piece of meat. As if her being there, trembling, naked, was the most normal thing in the world.

And yet still, she could feel their stares, even if she couldn't see them, and heat rose in her cheeks... and in her nethers, as well. Why? Surely she wasn't... enjoying this?

To be displayed is to show your obedience, a voice whispered in the back of her mind. Obedience is pleasure.

And for the first time since leaving the balcony, Celestia became aware of the state of her nethers.

She was drenched.

An hour of court passed, and Celestia felt like she was going to collapse. Her arms were beyond tired, and the only thing keeping her there was the command Luna had given her.

Which was why it was such a relief when Luna finally lifted her legs off her back.

"I release you from your position, dear sister."

Celestia slumped to the cold marble floor, her arms giving out and her knees hurting. And yet, the hurt felt...

Luna sighed. "I'm getting bored, Celestia," she said, in a petulant tone. "Honestly, I don't know how you keep this up. I love our subjects too, of course, but it can be so exhausting listening to their trivial problems for hours on end."

She grinned. "Perhaps some entertainment is in order."

Celestia didn't like the sound of that... or did she? She wasn't quite sure.

"Sit up," Luna said, pulling on Celestia's chain. Celestia did so, her arms falling to her sides. The cuffs around her wrists were undone by Luna's magic.

"Why don't..." Luna said slowly, tapping her chin, as if she didn't already know exactly what she had planned. "Ah, I know; why don't you pleasure yourself for all these ponies, dear sister? Give us a show."

"Y-yes... sister," Celestia said. She had no choice.

Sitting now on the top step of the stairs to the throne, she spread her legs. One tired hand went down, between her legs. Without the will or the energy to resist, Celestia could only watch helplessly as a finger slid down between the folds of her dripping cunt.

"Next petitioner," Luna called out, and without looking, Celestia could already feel their eyes on her... on the slit which she now began to rub, slowly at first, then with more vigor.

She let out a moan as her finger passed her clit, but... as she worked her own cunt (as she had so many times before), she couldn't help but feel...

Help but feel that...

Gods, it was so...unfulfilling.

It felt good, sure, as her fingers pistoned and caressed her marehood, and she let out another little squeak, but something was just... wrong. She wasn't... okay, she was aroused, her vagina was sopping wet and the fluids within clung to her fingers like glue, but... There was no rush.

She wasn't getting any closer to an orgasm, either.

Confused, she glanced back at her sister, and immediately her breath caught in her throat.

Only for her, that infernally tempting voice whispered in the back of her mind. Your orgasms are only for Luna.

Her head went fuzzy. Images of her sister, both in real life and in her dreams as of late, flooded in. No, she couldn't—her own sister! But... it was too late.

She began to move more vigorously, panting now. A second finger slid into her glistening slit.

Yes, that's it, Celestia Luna thought, watching her sister. Look at me. Think only of me. Only I can satisfy you. Only me.

Celestia let out her first moan. One hand crept up, wrapped around her breast. She began to knead it, pushing on it in rhythm with her fingers working down below. Her juices dripped out of her, pooling and smearing on the marble floor.

She could feel the eyes of the petitioners on her, and it felt good and terrifying at the same time.

And the petitioners?

They didn't care.

They didn't care at all.

Luna watched on, amused, as her sister's expression warped between total horror and absolute bliss.

And then, bliss won.

Her head slowly arched back towards the ceiling as she came, letting out a long, slow moan of pleasure as more and more marecum spurted out of her with each thrust of her fingers.

And all the while, Luna held her leash.

Celestia collapsed to the cold marble, a heaving, dripping, sweating, drooling mess.

"Oh, poor thing, tired already?" Luna said. "Well, you'd best recover quickly. After all..."

She smiled, devilishly.

"There's still another four hours of court left to go!"

Author's Note

Hope it was worth the wait.

More to come.