The machine pumped the dildo in and out the whole night of Luna, her first orgasm was like a release of the pent up stress and denial, the twentyfirst was painful and redundant. Luna haven't slept, at least not like a common pony would describe sleep, but she awakened feeling lifted and refreshed. Her marehood was sore and swollen, it has endured hours of continous pounding by an unfeeling machine.

She decided to take a stroll in the castle, searching for things to use in her penance. She went out to see the courtyard, only to discover that the guardians that diligently patrolled the perimeter wall forgot to close the gate, and leaving her naked body on display at this moment. She walked to the door to shut it when she noticed a school group having a rest on the other side of the road. They have not seen her, but that was just a matter of time. Luna quickly shut the gate with magic and instructed the guardians to close it if they pass through.

In the courtyard there was a single manual flour mill, it was made out of two perpednicular stone disk, the horisontal one had a trench where the grains should be poured, the vertical one had a long handle to aid the operator. The handle was made out of wood and had shackles for a pony's hand to affix.

"I can strap myself to it and enchant whips to force me to mill flour, but that would be a little mild" thought Luna.

After a little more thinking a brilliant idea came to her mind, lighting up her face with a twisted smile. She cast a complex spell to make this mill appear at several locations in Equestria and it will also create an inpassable cage around it. Her body will be distorted by an illusion changing her etheral mane into something more mundane, her height will be lowered and her wings or horn will disappear, but the her genital's look will be the original. The fillies and colts will see a fountain of bubbles instead.

Luna almost lunged to use the mill, but stopped because she need to set up the other parts of the castle to punish her. She went back inside the keep and searched for a small white box. Soon, she found it and set aside as she continued to dig up boxes that were marked as the parts of the fucking machine.

She walked to the fucking machine, that was now cleaned by one of the guardians. She opened the white box, it contained a enormous smooth ceramic dildo, contorting with ridges, bumps and protrusions. It was tearfult to look at, she felt pain in her loins just from its sight, yet she attached it inplace of the vaginal dildo she used the previous day. She also unboxed a pencil like rod with a rounded tip, it replaced the smaller dildo on the anal shaft.

She extracted a padded box containing a large glass bottle filled with transparent and viscous liquid. Luna admired her handywork, she was a master of alchemy and spent many night brewing her tormentor. It was a concentrated extrackt of chili pepper, black pepper, horseradish and other caustic plants. She poured its entire content into the lubricant tank of the machine.

She would begin her torment at this very moment but her chores must be done before. Without thinking she wiped of the remnants of the extrackt on her pussy, which ignited a agonising burning sensation so powerful that Luna spent minutes cupping her marehood. Her clit suffered the most, because its sensitivity and because the exposing clamp that she left on it sice the previous day.

But she had no time to waste, so she searched for her next tormentors, a somewhat smaller ceramic dildo adorned with dull spikes. She gleefully inserted it into her pussy, when the realisation hit her, she Hu made herself cum the previous night. She rewarded herself instead of punishing, she thought up an unlikely situation, as a canceling effect.

She weaved the fabric of dark magic, it permeated her sex, denying her from orgasm and keeping her marehood swollen until she makes her own sister cum. Yet she haven't stopped at this minor punishment, as she sentenced herself to more suffering for the undeserved orgasm. She either be on the fucking machine with at least one shaft on full speed or carry out her penance elsewhere.

She packed her arms full of whips and crops and other items and went out to the courtyard. She put on a pair of stocking which had clamps on the inside to attach to a garter belt. She didn't put on one but instead she attached the clamps to her inner labias, pulling them taut.

She cast several enchantments, one of the brushes were enchanted to consantly tickle her butthole. The whips she brought levitated menacingly, out of the seven, three were enchanted to always whip her ass, two whip her when she is too slow. One to aim between her legs when her speed is changing. The last on to flagellate her breasts.

She used a thin rope to bind her two nipples together creating a taut line between them, she tied the middle of it to her clit with another rope. Her nipples were pulled downwards while her clit was pulled upwards.

She magically sealed the dildo in herself and she took thin, long rod made out of oval shaped bulbs, she enchanted it to lube itself from the tank of the fucking machine and to slip in her peehole if she is at the starting position and in when she is the furthest from it.

She was ready to begin her penance, she cuffed herself to the horisontal rod on the mill, she put on a horn ring that will prevent any spellcasting for four hours. The enchantments on the whips have got the order to start punishing her.

She began pushing the rod, slowly walking around the mill, grinding on the magical wheat grains that appeared under the stone. Searing pain ripped through her ass, almost making her collapse but she kept on moving. Then another one, and another one, it took Luna only ten seconds to realise, she was too slow. She quickened her steps, only to make one of the whips lash at her cunt. It hit a not particulary sensitive spot on her inner labia, but the pain was enough to make her cry out.

After a full turn, the urethral beads when she was at the start of a turn and began sliding into her peehole, it felt like somepony just set fire under her as the spicy brew lube smeared around her hole. The ceramic dildo shifted around in her with each step, grinding its rock-hard bumps against her walls, yet she was still pushing the mill around with full speed. The brush on her asshole was merciless, her hand were bound so she could not scratch the itch that it caused in her sensitive area.

After a minute or so the whipping intensified, multiple lashes were dealt to her ass, and her tits recieved some too, but that was bareable compared to the tickling and the burning feeling in her urethra. She wasn't content with the string that connected her nipples and clitoris, so she instructed a guardian to treat the problem.

The stone statue brought three solid steel balls, about two centimeter diameter, it yanked off the strings from all three of her sensitive nubs, and and used fishing line to attach the steel ball to them individually. The line on the was very long and she pulled the balls on the ground behind her, she could feel each protruding stone, pebble, dent and hole in the ground, as all of them produced a painful pull when passed over.

She diligently pushed the rod, pulverizing the magical grain, her tits and ass was sore and dotted with whip marks, her labias hanged swollen and pulled by two chafing clamps, her peehole was being fucked by a urethral rod covered in spice extract causing a burning feeling. The itching on her anus was driving her mad, she couldn't scratch it and the brush was ceaseless in its job. Her clit and nipples got pulled randomly as she could not foretell the imperfections in the ground.

She lifted her head and looked around only to see her worst torture, dozens of ponies stood in a circle of the mill. She saw that a convict was being tortured on the mill, they saw her sex, her breasts and ass. The entire spectacle was surrounded by a metal cage of pentagonal steel rods, her crimes were written on a silver plate:

Assault against family member;
High treason;
Attempted murder;
Unlawful imprisonment attempt;
Rebelling;
Attempting to cause mass famine;
Assaulting civil authority;
Psychological and mental torture!

Tears run from Luna's eyes as she continued to push the rod, all of the ponies were staring at her either in disgust or in pity. She had no choice, she couldn't tell them to "go away", or "don't look at me", she just had to metally survive her own sentence. She asked one of the guardians to tell her the passed time, but she was mortified when she heard that only one hour passed.

The pain, the humiliation and the physical extertion left her dripping with sweat and tears, mixing with her other fluids on the ground and dust created mud which sticked to the steel balls and made them heavier. But the wosrt thing happeded to her was when mud deepened.

Luna felt a powerful yank on her clit, forcing her to stop, it was too strong to be a rock. One of the whips noticing that she slowed down attacked her cunt. Luna cried out in agony as her outer labias were assaulted. She looked back and noticed that one of the balls got stuck in between two rock that had been revealed by the mud. It could not move anymore. Luna bent forward to pick up the ball, but her hands were stopped by the shackles, even worse, her flank was constantly whipped by five lashes, she exposed her asshole which increased its sensitivity to tickling by tenfold and revealed her abused marehood to anypony standing behind her.

She has to try freeing it with her legs, she stepped behind the ball and tried to wedge her hoof under it. The mud proved too shallow to do that. Her juices caused this mess, they were constantly replenished as the guardians made her drink regularly. She dripped on the ground further enriching the it with moisture. She had another idea, she will move backwards to pull the ball at the opposing direction.

She grabbed the rod of the mill and started to pull it back, because of the acceleration she recieved an attack on her marehood. She shrieked in pain as it hit her love button, which was already in agony by pulling the steel ball, the whiplash on it caused her to slip and hung by her hand on the rod. When she stood up she seen that the ball came loose and she was ready to go, her ass was sore with whip marks.

Later the mud became deeper, and pulling the balls became agonizing as she had to pull a load of mud with them. They got stuck more and more often, which made the speed change reacting whip to dot Luna's swollen, exposed sex with whip marks. But her worst torture was the stare of the crowd surrounding the mill condeming her with their gaze.

When the four hours have passed, a guardian came and free Luna from the mill, the whiping ceased and the urethral rod had been pulled out, yet the ceramic intruder in her vagina was enchanted, so the guardian couldn't remove it. She carried Luna to the fucking machine and strapped her to the support. It started the anal shaft on full speed, which preemptively bathed itself with hot lube and began pounding Luna's rear.

She fell unconscious as soon as the itch was adequately scratched on her hole, and she drifted into a dreamless coma like sleep.

Author's Note

I got better at naming chapters...