In the dark cavern underneath the castle, a lithe purple unicorn sat in front of a large tome. Its dusty pages were illuminated by a simple spell she cast earlier. Lavender light danced on the crystals lining the cave's walls, filling the darkness with eerie glow. She knew she shouldn't have taken this book. The subject was forbidden - necromancy had been outlawed centuries ago. Yet, almost as if compelled by some dark, external force, she stole the book away and now indulged in its secrets.

The lavender ear twitched slightly. Hoofsteps? She wasn't alone any more. Twilight hastily shut the tome, and looked around in panic, searching for a place to hide. The sound was getting closer. No time. She whimpered, feeling her heart pound with fear. And then, she saw her princess, trotting slowly towards the poor, trembling filly. Celestia wore an angry expression on her face.

"Twilight Sparkle! What is the meaning of this?" The princess' stern tone caused the purple filly to jump. "I have explicitly forbade you from reading this," Celestia said with anger, her cold eyes piercing her student. Twilight couldn't bring herself to look back. She slumped her shoulders and sniffed. Shortly, tears stained the unicorn's cheeks.

"I-I'm so s-sorry, prin-"

Celestia scowled at Twilight. Both mares stood frozen, for seconds that felt like eternity. Silence was interrupted only by quiet sniffs coming from the lavender pony. The alicorn let out a sigh, closing her eyes and taking a moment for the anger to disperse.

"Twilight..." the white alicorn said, her features now gentle. She couldn't bring herself to be mad at her student. Not truly. Without a sound, the sun monarch approached the trembling unicorn and lay down by her side. Celestia extended her white wing and embraced the purple filly, dispelling her fears with a loving nuzzle. "Shh," she whispered. "Dry your tears, my dearest."

Twilight sniffed, and looking at the ground, brought a hoof to her runny nose.

"Dark and awful secrets are hidden in some tomes. Sometimes, they whisper. Their voices are soft and alluring; the things they promise..." Celestia whispered, bringing Twilight even closer. "You have to learn to be strong, my faithful student." She could feel the little unicorn's heartbeat quicken. "Nevertheless, I still have to punish you for disobeying me." The alicorn could feel her pupil tense in her embrace.

Celestia nuzzled her student again and smiled as a thought came to her. She met Twilight's teary eyes and offered a calming smile. The alicorn surrounded her majestic horn with magic and concentrated on a spell.

The purple unicorn heard a soft "pop," somewhere above eyes. She blinked, unable to believe what she saw - her own, disembodied horn, short, purple and stubby, was no longer connected to her forehead. Encased in her mentor's golden magic, it was slowly floating towards Celestia.

"My horn!" Twilight squeaked with panic. Celestia only giggled, amused by her student's reaction.

"I am taking it only temporarily. I hope you will learn your lesson this time, my dear. Magic is not something to be misused and some knowledge should remain forgotten. As you have disobeyed me, I will be confiscating your horn for two days, young lady."

"B-but, but his shouldn't even be possible! You can't just, just pop off a unicorn's horn! Magic doesn't work that way!" Twilight panicked, hyperventilating. She touched her forehead, and surely enough, there was no horn parting her mane. Her purple, stubby, lifelong companion was now floating lazily by Celestia.

The white alicorn smiled mischievously at her student and graced her empty forehead with a kiss. "Now, go to your room. You will have your horn back soon enough. Take this time to reflect on what you did." She stood up and with a blink of white light, the princess was gone, along with the forbidden book and Twilight's disembodied horn.

The purple filly sat in silence, dumbfounded by what just happened.

Twilight turned in her bed. Even though the moon was high in the sky, she couldn't get a wink of sleep. Everything felt weird. Alien.

She moved a hoof to her forehead. Still nothing. With a sigh, Twilight turned her head and looked out of the window. Stars winked at her from afar. She liked her horn. It was always with her, allowing her to do all manner of magic and tricks. Spells, enchantments and even curses were at her disposal thanks to her stubby, lavender friend. Her faithful companion. Sometimes even a lover, guiding magic to help the purple filly lose herself in carnal pleasure.

She tossed to her other side. Even the pillows were just weird without her horn poking at them.

The lavender mare looked at the night sky again and tried making her mind slow down. One star, two, three and there's a fourth, something touched her horn, fifth star, six stars, seven of them... Wait a minute. That was her horn she felt! Twilight sat up in her bed, gasping with excitement. Was it back? She touched her head all over, even in the back, just for good measure. In case Celestia's spell missed. Twilight shuddered at the thought. Still no horn, though. But sure enough, she felt something brush up against it once more.

Twilight bit her lower lip, feeling something smooth touch her missing, sensitive friend. A feather? She stifled a soft squeak. What's going on? What's happening to her horn? The purple filly jumped off the bed and started pacing in a circle. Something like this has never happened to her before. Did Celestia's spell malfunction? Was her horn in danger?

The panicking filly imagined a flock of wild birds, carelessly tossing her purple friend across the air. She pictured her horn lost in a dark forest, alone and forgotten, slowly covered by the undergrowth. She trotted faster, walking around and around, her mind providing her with the darkest scenarios it could conjure. What if a beast took hold of it? Twilight imagined a manticore wearing her horn like a fashion accessory.

The feeling she was getting from her lost horn suddenly changed, interrupting her train of thought and sending pleasure down her spine. She shuddered and nearly dropped to the ground, caught off guard by the new sensation. The bookish filly could feel something warm and moist dance along her horn. It was strong and dominating, caressing her horn's ridges with force, and yet moving across it with such gentleness and care. It almost felt like a... Tongue. With a gasp, Twilight realized what was going on.

She was being punished.

A blush crept up her cheeks as the gravity of the situation dawned on her. It looked like her mentor was interested in the lavender filly in more ways than one.

Twilight lost her footing, feeling the tongue caress the tip of her horn with a tiniest, most delicate of motions. She fell on the cold stone floor, whimpering softly. The polished rock felt chilly, eliciting a hiss from the purple pony. She stood up on the shaky legs, and made her way towards the bed. Twilight settled on her back and closed her eyes, her heart rate increasing in anticipation. Any moment now, her princess would continue.

The rosy-cheeked mare couldn't help but to imagine Celestia laying on her royal bed, playing with her student's horn. In Twilight's mind, the sun princess wore stockings and risque lingerie that revealed more than it hid, accentuating the pristine white curves of the royal flanks.

Twilight could only wait now. Although she felt the need pressure her into action, pleasuring herself was out of the question. Her hooves were always too rough; the lithe mare used magic for this embarrassing task almost exclusively. She whimpered, trashing around on her bed, unable to elicit a tiniest bit of carnal pleasure on her own. The unbearable waiting was getting her more and more aroused by the minute. Her needing marehood was swelling, glistening with her building lust, and begging for her mentor's mercy.

Perhaps she should show her princess how much did she really need her? Twilight closed her eyes and spread her legs, imagining Celestia watching her. Considering the nature of things, she probably was. The purple mare felt herself blush.

There it was again! Another lick, slow and deliberate, elicited a squeak from the purple filly. She felt a strong muscle coat her horn with saliva; caressing all the little ridges and imperfections of her purple friend. Was it a reward for her obscene behavior? It seemed as if Twilight's guess was correct - she was being watched. The panting mare wondered what else could she do, to earn another prize from her teacher.

A vision of her mentor indulging on her precious horn appeared before her - Celestia was enjoying it like she would a lollipop, giving her faithful student a sultry look.

Moon's silver light moved slowly, illuminating Twilight's bed with an eerie glow. With her legs splayed open like they were, visible in the moonlight, she felt naked and vulnerable. The lavender mare whimpered - she had to be a good little filly. She had to let her princess see everything. Twilight moved her slightly shaky hooves down her delicate frame. After one agonizing minute, she arrived at her destination. Reaching the pair of pliable, moist lips, the purple unicorn used both her hooves to spread herself open, letting moon's light into her love tunnel. Twilight felt her pleasure button twitch slightly in excitement - every part of her was now illuminated for Celestia to see.

The purple filly waited, her heart pounding like crazy. Did her princess like it? Was she a good student now? Twilight whimpered in anticipation for what felt like hours. Finally, she felt her reward. Somewhere in the castle, the princess' tongue graced Twilight's stubby horn.

"Nnngh," was all objection that Twilight could voice. She arched her back and felt her hips buck on their own. Involuntarily, she cried, out feeling the waves of pleasure close in on her. The purple mare let out a whimper, feeling the familiar pressure build again. With each lick, she unconsciously moved her head, as if to hurry up the princess. Panting and sweating, she let out a throaty moan. So very close, now. Twilight desperately needed release.

As quickly as they came, the sensations on her horn disappeared, leaving the lavender filly just short of her peak. Twilight let out a whinny, instinctively spreading her legs as far as she could. Her hips bucked on their own, but she felt only air meet her winking treasure; it seemed like she was not allowed to come just yet. After all, the naughty filly was being punished.

Her breaths were ragged, and all she could hear was the pounding of her heart. Coming down from the denied peak, Twilight was offered a moment of clarity. She noticed that her purple coat was now covered in sweat, that a trickle of fluid was slowly escaping her winking pussy. She felt a sweet scent of mare's arousal, permeating the cold, night air. All of it made the lithe mare blush with embarrassment.

The purple unicorn imagined how it would feel to caress her supple teats with her magic. To twist each nipple, abusing it, to make it hard and perky. She remembered how she loved to spank star specked flanks in the heat of the moment, how it made her jump over the threshold of attainable pleasure. She wanted her horn back. She needed it. Now.

"Princess! Please!" Twilight cried out, gasping for air.

Although it was past midnight now, and she was tired and sleepy, the purple mare was kept awake by the constant denial of the sweet release. She felt a pair of lips close around her horn as the tongue continued ravishing its ridges. Twilight felt a soft vibration. Was Celestia giggling?

When trashing her head around in pleasure, Twilight noticed a large mirror, angled just so she could see herself on the bed. Did she leave it pointing that way? Moaning softly, she took a better look at what had to be herself. Rosy-cheeked, panting, squeaking cutely and spreading her supple legs in pale moonlight. Two perky nipples were erect, her clitoris stood firm between the parted, swollen lips. She could see inside herself - glistening in the night, there was her love tunnel.

Twilight felt strangely titillated by this sight. The pony on the other side looked so alien. A stunningly beautiful mare, lost in passion and pleasure. Twilight bit her lip, feeling more excitement build. The sight was so far removed from the bookish and dry pony that usually gazed at her from the mirror. Was it really her?

Meanwhile, the tongue wrapped around Twilight's horn, and began sliding up and down its length. With a short gasp, she fell on her bed again and squeaked in pleasure. She was getting close once more. Thinking back to the mare from the mirror, Twilight felt that she couldn't really be mad at her teacher. How could anypony resist that sight?

A stray thought emerged, and after a while it was constantly occupying her hazy mind. It nested there long before this faithful night, but usually it made Twilight shake her head and try to forget. For the longest time, she felt harboring this offending view was somehow wrong, that in a way, she was betraying her princess. Perhaps it was the realization she felt seeing the mare in the mirror, or maybe it was the pleasure that made her inhibitions lower, but for the first time, the moaning mare felt the confidence to say it. She had to. It was now or never.

"I love you, princess," the sweaty unicorn whispered quietly, her words punctuated by high-pitched squeaks. She felt the speed of Celestia's tongue increase, and suddenly couldn't think any more. No rationalizations, no uncertainties, no over thinking things. It was just the sweating purple mare and Celestia's strong tongue. Twilight whimpered, losing herself in pleasure once again.

Unable to dwell on the musings about her feelings for the princess, she felt Celestia begin to suck, making a wonderful sensation spread from her horn throughout the rest of her trembling body. Twilight tried arching her back again, but she felt no strength left in her exhausted muscles. In her bedroom, under the pale moonlight, the panting unicorn was all but completely spent.

"M-more..." The moan came as a whisper. Twilight felt her eyes close - she was unable to keep them open any more. The tongue on her horn slowed down, denying her the orgasm once again. It was letting her rest, bringing her down from the pleasure's summit. A soft whine of disappointment escaped from Twilight's blushing muzzle. Right. She remembered. She was being punished.

The strong muscle moved slowly and deliberately, its teasing occasionally interrupted by a light suckle. The world didn't matter anymore. The purple pony could hear only white noise ringing in her ears. Celestia's ministrations left Twilight in a constant state of arousal. Not enough to let her climb to an orgasm, but just as much to keep the unicorn from instantly falling asleep. The purple mare bit her lower lip, starting to wonder how much longer she could take it.

As her breath slowed, Twilight could still feel the princess playing with her horn. Everything seemed more peaceful and distant. Almost as if the world was made of cotton candy. The lavender filly sighed happily and looked at stars winking at fer from the window. She let out a soft purr as she felt a particularly long and hard lick graze her purple horn's surface. The stars began moving. She found it strangely calming. They danced in the sky, then one by one, flew into her bedroom. Twilight could only stare, stifling the quiet moans of pleasure.

The stars danced on her ceiling - it was now a night sky. She looked in the mirror and saw Celestia right next to another Twilight, kissing passionately. They shared a knowing look with the sleepy filly on the bed and began licking each other's horns.

Twilight blinked - she was now in a green glade. A cute moan escaped her lips as she felt the blades of grass caress and kiss her coat.

She gasped for the last time that night as she saw Celestia walking towards her, a short, stubby, purple horn sticking in her mouth. She seemed to be sucking on it, like a lollipop. The white alicorn suckled hard on her treat and then with a "pop" removed it from her mouth, lowering her eyelids and giving her student a "come hither" look.

In the Canterlot castle, on a soft bed, wrapped in sweaty sheets, an aroused, purple, sleeping filly finally came, lost in her dreams. With a tiniest of moans, she tensed up a bit and let a trickle of fluid escape from her swollen treasure, allowing it to flow down her twitching, lavender leg. Twilight smiled. It was good to be punished.

All the paperwork was done. Neat stacks of document, now dealt with, decorated the princess' desk. The sun monarch's white body occupied a large, lush pillow. Celestia used her tongue to slightly turn her mouth's purple occupant as she suckled on it some more. She arched her back and stretched her wings, purring with fatigue.

I have to do this more often. The work simply flew by in no time, mused the sun monarch.

Celestia slowly removed her student's horn from her muzzle. She assessed it with a critical eye. It was thoroughly covered in her saliva. The sun monarch smiled and gave it one more lick for good measure, setting in on the desk, behind the inkwell. It looked surprisingly fashionable. She glanced towards her sleeping pupil; Celestia observed her this whole evening through a small, enchanted mirror. It sat on her royal desk, by all the paperwork.

The purple filly on the other side let out a cute moan in her sleep.

The white alicorn looked at Twilight's slumbering form with love and lust in her eyes. She did get quite wet during this whole session. Celestia eyed her student's horn once again. It was tempting to let herself simply indulge. Twilight would wake up, though - the purple filly got enough of the punishment for one night.

The white pony made her way towards the royal bed. Her arousal could be saved for tomorrow. After all, she had a whole day to punish Twilight as she saw fit. Celestia couldn't help but to lick her lips in anticipation.

Twilight woke up with a gasp. It was exactly sunrise, and it seemed that somepony was caressing her poor horn with feathers again. Her hoof moved slowly towards her forehead. Twilight let herself hope for a moment. Nope. Still gone. Her face fell.

A pop of golden magic startled the purple pony. A folded piece of paper appeared in the air. Twilight tried to catch it. The offending letter started to gently fall towards her bed, disobeying her. Right. No magic. The letter slowly floated down and settled on her sheets. The purple pony stared at it for a while, as if waiting for something to happen. Right, no magic. She had to open it manually.

After fumbling around with much too many hooves and noses, she finally managed to get it open.

My dearest, most faithful student,

I will be waiting for you to join me during the first breakfast. As you should be aware, it begins shortly after sunrise. Seeing as you are still being punished for yesterday's exploits, I urge you to be on time.

Your loving teacher,
Celestia

Twilight quickly reread the letter with a pounding heart. She usually woke up on time for second breakfast. Hardly anypony, save for the princess herself, ate at the first light. Twilight glanced at the morning sun. I urge you to be on time. She looked herself over. Stained, sweaty coat, unkempt mane. She could smell the sweet scent of mare's arousal. I urge you to be on time. No time. She was late already. With a whimper, Twilight bolted towards the exit door.

The dining hall was for the most part, empty. A few tables were occupied, but none of the feasting ponies seemed to pay any attention to the flustered unicorn doing her best to sneak through unnoticed. At least she wouldn't be laughed at for appearing here looking as if she entertained a colt last night. All she was missing was stallion's seed covering her flank, the lavender unicorn mused, blushing horribly.

Twilight spied Celestia at her private table on the dais in the back. The purple unicorn increased her pace, heading straight for the sun monarch. The white alicorn lay on her side, resting on a great, plush cushion by the table. She was levitating a small silver fork with a slice of an apple on top. Celestia took a bite and smiled, noticing a lavender mare come to her table.

"My faithful student, I'm so glad for having you here with me. Not that many ponies manage to find strength and motivation to raise as the sun does," Celestia said, smiling lovingly at the purple filly joining her on the cushions.

"Oh, it's n-nothing, princess," said Twilight, trying to cover her blush and sitting by Celestia's side. Gulping, she realized, that she probably stained the pillow she sat on.

"Have you slept well, my dearest student?" The white alicorn asked, conjuring a brush out of nowhere. She levitated it in her golden aura and began straightening Twilight's mane. Her student's face was now almost on fire.

Right. Focus, deep breaths, thought Twilight, desperate to get her arousal under wraps. Calm down, stop blushing, is that my horn on the table, you will be fine as long as you keep calm. The lavender mare stared, as the brush worked out tangles in her mane. MY HORN IS ON THE TABLE.

Noticing the horror on her student's face, Celestia allowed herself a perfectly mischievous giggle. With her gold-clad hoof, she took Twilight's muzzle and turned it, so that both mares now looked directly into each other's eyes. Golden aura encased the purple horn as it rose up from the table and floated to Celestia. She gazed Twilight directly in the eye. She saw despair, but also lust. And was it a hint of longing?

The white alicorn gave her student a sultry smile and bringing the disembodied horn to her royal muzzle, licked it slowly, watching her student's reaction.

Twilight clamped her muzzle shut with her hooves, trying to stop making a moan. There were ponies there, eating in peace. Surely Celestia couldn't...

"An idea came to me after last night," the alicorn said in between the agonizingly slow licks. "And so I waited for the morning..." Twilight could only stare as the princess moved the purple horn across her white coat, caressing herself with it. Twilight squeaked involuntarily, as she felt Celestia's fur kissing her sensitive purple friend. Then, she lost the sight of her horn as it disappeared behind her princess. Where did it go?

"I am sure you will enjoy it, my dearest student," said the monarch, the last word punctuated with an erotic gasp. Twilight's eyes went wide as she felt her horn slide in someplace warm and slick. The princess was right there, watching her. The purple mare tried her hardest to contain a moan as she felt her horn begin to move grinding against Celestia's lubricated inner walls. She could feel her mentor's love tunnel twitch slightly around her horn.

Beneath the alicorn's asshole, the royal lower lips were entertaining a visitor. Twilight's horn was eagerly thrusting in and out of the royal pussy, spreading it wide, and then letting the white lips close as it disappeared in the depths of her majesty's love. The whole activity was safely hidden and discreet, thanks to the sun regent's flowing, multicolored tail.

Celestia bit her lower lip, sensing a bit of blush creep up her pristine white cheeks. She could feel her marehood tighten around Twilight's stubby horn, milking it and squeezing it lovingly. She pushed it as far as she could with her magic, it was now poking at Celestia's cervix. Her student, sweaty, flustered and moaning, was trying to make herself as small as possible behind the table - the only thing shielding them both from the rest of the busy dining hall.

The sun monarch noticed one or two ponies turn their heads to investigate the curious sounds coming from the royal table, but she didn't pay them any mind. Twilight on the other hand would most probably be pale, if her body wasn't busy pumping whole the supply of her blood to her blushing face and swollen nethers.

"P-princess...!" Twilight voiced a hushed objection to her horn slowly bucking her majesty's behind. She stifled a yelp, feeling her own marehood wink in anticipation.

"You are still being punished, my faithful student," said Celestia, her voice steady and calm. "And I must say, I have not allowed myself to have this much fun for far too long." Apart from nigh unnoticeable blush, her royal highness did not appear to be repeatedly penetrated by a stubby lavender intruder. Twilight, jealous of her mentor's composure, could only whimper at the sensations she was experiencing. The knowledge of her horn's whereabouts alone, threatened to bring the purple filly over the edge.

Twilight tried to organised her thoughts. The strange courage that filled her last night was back. She had another chance. Although she did squeak once every ten seconds, she managed to look with her hopeful eyes directly at her princess, and ask with a trembling voice.

"About l-last night..." said the purple pony, panting.

"Yes, my dearest?" Celestia smiled lovingly at her student, giggling at the cute sounds she was making.

"D-did you hear w-what I said back then?" Twilight asked. Her mind was racing, both from exorbitant amount of pleasure and the possible responses to the question she actually wanted to ask. What am I to you, princess? The purple mare tried to look away, unwilling to gaze directly at her mentor. Her horn sliding in and out of the princess certainly did nothing to help the matters.

"I did," came Celestia's answer. Twilight felt her heart rate increase even more. Her horn moved faster and faster, eliciting a continuous flow of moans and squeaks from the purple filly. Almost there. The rapid pounding of her heart was drowning almost all other sound, save for her princess' voice.

Twilight felt her horn twist and plunge deep inside Celestia, the royal inner walls tightening around it and holding it in place, as deep as it could possibly go. Twilight could only tremble as she heard the only sound in the world that mattered to her. The princess was right beside her, bringing her muzzle close; she nibbled on a lavender ear and whispered to the unicorn waiting patiently at the summit of her pleasure.

"I love you too, my faithful student."

Unable to contain a scream, Twilight came.

Sweepy Shine was busy eating his avocado. He talked to other castle staff at the table, gossiped about which corridors housed the dirtiest ponies and concentrated on filling his belly. Then he heard it. An ear piercing scream filled the dining hall. He paled as he realized what it was - an unmistakable moan of a mare reaching her orgasm. After what felt like hours, the mysterious filly stopped.

He heard the sound of cutlery falling onto the plates. A glass fell and shattered on the floor. Looking around, Sweepy saw terrified faces frozen in horror. In the far end of the dining hall, her royal highness, princess Celestia looked as distraught as everypony else. She froze as she was just about to indulge in some inconspicuous salad. He felt something poke him in the ribs.

"Oi, Sweepy. Is it just me, mate, or did an invisible mare cum in the center of the dining hall?" asked Dusty Tail, looking unfazed by this whole event. "Sounded like she's a screamer."

Author's Note

How will things proceed from now on? What other punishments await the purple unicorn? Will she ever get her horn back? If so, how will she feel about it sticking out from her forehead for everypony to see, knowing where it's been?

Favorite and like to find out more in the future update!

PS Thoughts about the picture? I am really tempted too add a furiously blushing Twilight on the bottom.
PPS Every story needs a good plot device. Get it? Cos' it's the horn, and it's been in Celestia's... Oh, forget it.