~*Author's Note: This story takes place after the season four premiere, so it includes important facts like Twilight drinking cum and Princess sister tentacle sex. If you haven't seen the premier, and therefore don't know about Princess sister tentacle sex or Twilight drinking cum, then don't read this fic before you've watched it or you'll find out that Twilight drinks cum and the sister Princesses have tentacle sex*~

Twilight horse Sparkle, princess of Ponyville, sipped on her beaker of cum.

"I just can't get enough of this stuff!" she said as mini boss Princess Luna moon horse of the night finished buckling Twilight Sparkle's wings down so they wouldn't get in the way. Alicorn smaller boss horse Princess of Dreams Luna put the lacy stockings and frilly petticoats and puffy black dress and starched white apron on the smallest horse princess Twilight while Twilight drank her cum and smacked her lips after each sip.

"WE FIND YOUR NEW BEVERAGE OF CHOICE QUITE REVOLTING," mini boss Luna Princess horse said, her powerful voice blasting under Twilight's skirts because Luna was behind her messing about with some extra bows and stuff.

"Woah, nelly!" Twilight said, moaning into her cum flask. She took a minute to catch her breath before she explained. "It's just after all that stuff that happened before the summer summer sun summer sun celebration where I rescued you and Princess Celestia," she blushed just saying the perfect name of the most perfect horse Princess, "from those sexy tentacle vines," she blushed even more and her tail started to raise up on its own, "Who knows what was going on for that whole night and half the day, where you and Princess Celestia were all tied up by the vines, encapsulated by long, snakey appendages forcing themselves into your-"

"WHAT DOES THIS HAVE TO DO WITH YOU DRINKING CUM ALL THE TIME?" Princess mini boss Luna horse of the night asked, sending Twilight horse Sparkle princess tumbling ass over teakettle and landing teakettle up. Sticky strands of cum were dripping off her face, and she used her little orange princess horse tongue to lick some up off of the floor like a dog.

"Well, Zecora gave me a flask of magic horse cum to guzzle," Twilight horse explained as she got the last of the cum off the floor with her tongue. "It would give me magic flashbacks whenever I would guzzle some, and it just tasted great! I asked her what it was and she straight up said that my magic had turned her potion into cum, because of how abnormal my horse brain is. Normally it would be like, milk or stomach medicine or something apparently for a less abnormal horse."

Mini boss Luna walked over to Twilight horse Sparkle princess and licked a dab of it off of her nose. She wrinkled her dark blue nose up at the taste, and her shapely Princess tongue flicked over her gleaming white teeth and soft dark lips and she said, "No, I don't care for it." She didn't use her Royal Canterlot Princess Horse Voice because she was tired of having to chase Twilight horse all over the place when she rolled and flopped all over the floor all the time. One time Twilight horse ended up under the bed and mini boss Luna had to get a broom and slide it under there to get Twilight horse out. One time she was under the cabinet and mini boss horse Luna could just barely get her hoof on the end of Twilight Sparkle's princess tail and it kept slipping off so she ended up having to move the cabinet to even get to the smallest horse princess out from under there. Twilight would just make a little horse face the whole time.

Luna mini boss Luna lay on her side on her royal horse floor pillow and whickered. "Enough silly nonsense," she said, the graceful curve of her neck leading to her smooth side and belly, down to the supple arc of her dark, royal flank. "Now that you are appropriately attired, you must begin your cleaning duties."

"Ugh, when will Princess Celestia be back?" Twilight grumbled, licking the rim of her cum flask and smacking her lips.

Mini boss Luna moved her royal tail to the side, leaving her dark Princess anus and horse bits clearly visible. The drifty smoke of her starry nighttime tail was across her hip so that Twilight princess could just barely see her eyes. "My sister cannot spend every waking moment dealing with you." She grabbed a nice big section of Twilight horse's mane with her magic and drug her across the floor. Twilight's hooves slid across the tile as she kicked and whinnied, until her nose was pressed up under Princess Luna horse's own personal red ring of death (that's a gamer luna joke everybody loves that frisky filly!).

"Lick!" the horse Princess of Dreams said.

"Why is it always butt stuff with you?" Twilight asked around a mouthful of the darkest star in Luna's sky. "It's always 'lick my butt' or 'lube up my butt' or 'give my butt a hoofjob' or mrghthpth!" Mini boss Luna shoved Twilight horse more forcefully against the black hole in her celestial body and sighed. It was going to be a long night.

Fortunately, there was a page break that let us skip the rest of it.

"So why is it always butt stuff with Princess Luna?" Twilight horse asked as she took a sip from her cum flask.

She was walking unsteadily beside biggest horse boss Princess Celestia through the royal gardens. Her horse butt was covered in bandages from the spanking she'd gotten, but Twilight horse was mostly unsteady from all the horsgasms she'd secretly had while glorious Celestia had whipped her.

Princess Celestia adjusted her wings with a tender rustle of feathers that set Twilight horse's heart aflutter. The glorious large princess horse of the sun leaned down and whispered in Twilight's ear, her hot breath tickling Twilight's little ear hairs and making her drip a little down there. "Just say her name backwards," is what Celestia's perfect white horse mouth said, and Twilight could hear the spit in her mouth, and could imagine perfectly the shape of the Princess's lips and tongue as they made those words, and she had to hang back a bit and shudder as she came a little bit.

The she thought about Luna's name backwards and said "Oooooooh," then put her own smaller princess hoof up to her lip and said "but isn't it spelled with two 'a's?" Celestia Princess, largest horse boss, just winked. Like ;2 but with her actual horse face.

They were at the edge of the garden and Twilight horse took a long, thoughtful drink from her cum flask as Celestia talked.
Normally, Twilight Sparkle, former student of the glorious lilly white Princess-ruler of the Sun, would be hanging on Celestia's every word. But, as she sipped her cum, she kept thinking about the black vines. She kept thinking about how the vines must have wrapped themselves around the Princess's long, perfect leg, up across her flank that would have compressed just a little against the vine's grip. Around her throat, tangling up in her forelegs and her mane. Maybe, inside the cocoon of writing plants, blind tendrils had tried to push past her lips...

And on the other side of the page break, another pony was thinking about those very same vines. A pony that was a lot like Twilight Sparkle. (Spoilers: It's her brother.)

Empress large wife Mi Amore Cadenza did her bench presses while her husband Shining Armor spotted her with his protection magic. Cadence had always had a powerfully built chest, and prided herself on her forebody strength. It came in handy when she needed to hold her husband down for some of the less consensual love experiments.

"So, Cadence," Shining Armor said as his large princess wife lifted more than his body weight repeatedly with her front hooves, "I was thinkin' we still totally gotta get revenge on Twiley for humiliating me."

His large wife didn't answer. She grunted, breathing in through her nose and out through her mouth. Sweat rolled across her fuckin ripped chest as she heaved the weights up again and again. Shining Armor remembered the last time that chest had been pressed against his back, his large wife whispering in his ear. "This time, I'm going in dry." He shuddered.

She locked the bar into the frame and rolled onto her hooves. Her hair was tied back in a loose ponytail, and stray strands stuck to her sweaty face. Shining Armor checked the clipboard to see which method he was supposed to use to wipe her down today.

He took the green Shrek bath mitt in his mouth, carefully patting her face and neck, the rippling muscles of her chest and forelegs, along her shoulder, barrel, croup, dock, flank, and then down the stifle, gaskin, hock, cannon, fetlock and pastern on each of her rear legs. She whickered softly and pawed at the ground with her powerful forehoof as he squeezed the Shrek bath mitt in his mouth whenever it became completely soaked, so that his large Empress princess wife's sweat dripped across his tongue and down his throat. He wrung out her mane and tail and then licked the last little runnels of fragrant, salty perspiration from her hooves. She made some notes in her notebook and walked over to the treadmill.

"So, uh, honey," Shining Armor said, "I got some of those evil seeds. I was thinking you could like, use your alicorn princess powers to make them go get Twilight in public and like, it would be really embarassing?" He trotted after her, always a few steps behind.

"What size strapon are we using tonight?" Cadence asked, moving from a walk to an amble. Cadence didn't trot because she'd been trained to be a gaited horse, although she could perform both the piaffe and passage.

"About that," Shining Armor said as Princess Mi Amore Cadenza began to canter, "I was thinking maybe we could have like, normal sex for tonight, like, where I get to be the stallion and you get to be the mare."

Empress Cadence was running at a full gallop, her powerful hooffalls making the entire machine shake. "Huh?" she said.

"You know?" Shining Armor said, blushing, "Like, I could use my weenie maybe, like, flop it around inside you?" He held up her squeeze bottle with his unicorn magic while she took a sip, still hammering away on the treadmill. Her chest heaved and her long hair slapped against her back. Only one hoof ever touched the surface of the treatmill at any given time as the muscles slid under her slick hide, and Shining Armor could almost imagine her flying, if her her wings hadn't pressed tight up against her sides.

"We already did those love experiments," Cadence said after a few minutes, between heavy breaths. "Like, ages ago we finished all that up. I think tonight is the large size extra thick one," she said as the treadmill slowed and she let it carry her back onto the floor. "I know that one's rough on you, but you're my brave little husband and I know you'll do fine," she kissed him lightly on the cheek as he got the Shrek bath mitt out again, this time starting at her pastern and moving up her leg. "And then in the morning we can go to Ponyville with your magic seeds as a special treat for my brave little stallion for taking the whole big, mean strapon right up to the hilt!" She held her fore hoof up for him to lick. "Then, ice cream!"

Fortunately, there was a page break before anything untoward happened, and after the page break, the time and location were both different.

"So then I usually go ask all my friends what I should do, and I take all their advice very seriously," Twilight Sparkle, horse princess of Ponyville, said to Princess Celestia. It was cold out, and so both were wearing those blankets you put on horses. Twilight's had constellations on hers, and Princess Celestia's was white with her cutie mark on the back and Shrek on the front.

Princess Celestia nodded her graceful, gorgeous head. She'd decided to come to Ponyville this time with Princess Twilight horse, and maybe try to find out exactly where he former student was cocking the whole thing up. "You were the Elements of Harmony for a reason. I expect you to work together and help one another out," she said.

Applejack walked by in the background just then and said "Howdy" and waved to Princess Celestia and Twilight. Princess Celestia smiled at her and waved back, but Twilight wasn't paying any attention, and Applejack wandered off into the background from whence she came before Twilight Sparkle even saw her.

Just then black vines shot up out of the snow-covered ground, wrapping around Twilight and Princess Celestia's forelegs. Before they could do anything even more vines shot out all over, all black and waxy with big blue thorn-looking dealies on them. They entwined themselves around the horses' necks and rear legs, binding up their horns and their wings.

"Gotcha!" Shining Armor yelled, jumping out from behind the Library. Empress Mi Amore Cadenza ambled slowly out, petting Shining Armor on the head.

Then Shining Armor noticed the vines had got Celestia too. Both the mares were pressed tightly against one another, vines snaking around their horns, gripping their wings, lifting them up into the air and wrapping them up tight in a cocoon. Twilight's face was pressed against Celestia's shoulder, and Shining Armor swore he saw her tongue slip out. Celestia's neck was bent, the vines pressing her mouth against Twilight's horn.

"Oh shit!" Shining Armor said. "Oh fuck Cadence they got Celestia oh fuck! Why is Celestia here? Fuck!" More vines covered their back legs, spreading them, lifting their tails and pinning them against their backs, roving across every centimeter of exposed skin until only their faces were visible, and those were disappearing quickly behind a writhing ball of tentacles.

"I'm trying to do magic, but it's weird, it's like some other unicorn is blocking me." Shining Armor said.

"Me too," said Cadence, cocking an eyebrow at the ball of vines. "We'd better go, though. These vines should only last for a few hours. Unless they're given powerful magic to keep them alive. Even then, they'd be good for a day at most. It's a good thing nopony was anywhere near here, although I guess that makes your prank a big failure."

Strange moans were coming from the ball of vines, along with a lot of slippery wet squishing sounds. "Don't worry, Shiny," Cadence said, stroking his mane with one hoof. "The vines won't hurt them or anything. Although I didn't really expect them to be this frisky." Something squirted out of a small gap toward the rear of the vine ball.

Shining Armor groaned. "I don't guess we can still get ice cream?" he asked, looking downcast.

Empress Princess Mi Amore Cadenza tapped her hoof against her chin.

"You know what? I think we still have time for ice cream."

And if any pony would have had their ear up to the lips of both Twilight Sparkle and Shining Armor, that pony would have heard both of them say "Score."

THE END

Author's Note

This story includes all the important facts from the Season Four premiere episodes like Twilight drinking cum and the tentacle sex.

Also Cadence's bench press bar has like, doohickeys that lock onto her horsehoes so she can hold it up.

This chapter has a special guest star appearance that you may know and love.