It was the following evening after Celestia and Twilight's, for a lack of better words, fucking. Celestia looked over her desk as she put her pen down. It was hard for the princess believe that she actually got through her day and finished all paperwork that came with her title of princess. Even when Luna returned from the moon and took a share of the work, it's been many years since Celestia could say she accomplished such a feat. It was like a heavy amount of baggage just came off of her shoulders.

It was so good. And she wanted more.

The door slowly creaked open as Celestia turned her head excitedly. She couldn't hide the smirk on her face as Twilight walked into the room. She walked in with her everyday street clothes, a bag was hanging over her shoulder as she also wore a smirk of her own across her face. Both of them knew that this was going to be another fun night.

"On your feet, Princess." commanded Twilight. Celestia got out of her chair and walked to the center of the room, standing front and center before her Mistress. Twilight noticed the magic inhibitor on Celestia's horn, the device making Celestia powerless. "I see you put the ring on."

"Of course, Twilight." smirked Celestia, "I'm helpless to your command."

Twilight shook her head, her horn glowing as she levitated a riding crop from her bag. She tapped the leathery implement in her hands, "What did you call me, Princess."

Celestia gasped, "O-oh, I'm sorry, Mistress! Please forgive me!"

Twilight smirked back at Celestia, "I think you need to be punished for not addressing me, properly, Princess. Now strip."

"B-but, Mistress-" Celestia yelped as Twilight pointed the crop at her.

"Strip, Princess. Or your punishment will be worse." Twilight warned. Celestia gulped as she grabbed her dress, undoing the straps and beginning to pull her dress down and off of her body. Once her dress was down, she started to take off her tiara and jewelry as she stood there in her yellow underwear and stockings. Her bra held up Celestia's d-cup breasts and her matching thong did nothing to hide her big, round ass.

Twilight pursed her lips, waltzing around Celestia's half-dressed body as she lifted the crop and give her a swift swat onto her bouncy cheeks, causing the voluptuous woman to jump on her toes. "A thong, Princess. That's very naughty." she lectured, "I think your underwear should be confiscated until further notice."

"Y-yes, Mistress." whimpered Celestia as she got to work on undoing her bra. Once it was off, she tugged down her thong down, standing in just her socks. As she moved to remove them, Twilight's swatted her thigh, getting another cry from the Princess.

Twilight eyed Celestia's voluptuous body, "I want the socks on." Twilight pointed her crop to the bed, "Now, bend over. Ass out."

"Yes, Mistress." Celestia moved over to the bed as she bent herself over the bed, sticking her round bottom out as she bit her lip. Her ass was still quite pink after her paddling from the night before, her right cheek especially sore. She felt Twilight's hands grope her ass, grabbing and squeezing her cheeks. "Aaah!" moaned Celestia, "P-please, Mistress! I-I'm still sore from yesterday!"

"Mmm, that's not my problem." Twilight told her firmly as she levitated a leathery belt from her bag. "And I don't believe I asked for your opinion. You just earned yourself more punishment." Twilight looped the belt over in her hands before she got up, "It's time for another spanking, Celestia."

Celestia whimpered as she felt Twilight let go of her ass. She braced herself the best she could, but the sting of the leather belt caused her to cry out in pain from the lash on her left cheek. The second hit her on her right, which got an even louder howl from the Princess as her ass jiggled.

Twilight looked at her jiggling ass lustfully, continuing to lash at her ass in a repetitive pattern. Left, right, left, right. "You have such a perfect ass, Princess. It's such a shame you always have to hide it with your dress." A lash hit across the upper thighs, or sit spots causing a loud shriek to echo through the room, "Or should I say try to hide it? You're such a slutty Princess, Celestia. Wearing tight dresses that show off your curves. You want someone to notice you, don't you? You love it when people stare at your body."

Another lash hit her sit spots, causing Celestia to cry even louder. "I-I'm sorry, Mistress! I do want people to look at my body!" Another lash at the spot got another cry, tears rolling down the Princess's face, "I'm a slut! A slutty Princess!"

Twilight nodded as she set down the belt, "Good little slut." She got a good look at her searing red ass. Twilight leaned down as she started to land kisses on Celestia's burning thighs and ass, "There, there, my slutty Princess." Celestia moaned as she felt Twilight's delicate lips dance across her sore ass, a louder cry of pleasure echoing as she felt Twilight give a slow lick across her outer lips. "Mmm, wet already, Princess? What a little masochist."

Celestia gulped, "Y-yes, Mistress. I-I'm a slutty masochist."

"That must mean your punishment wasn't very effective." Twilight levitated a long, purple dildo from her bag. She hovered it in front of Celestia's face so she could see it. "You must be punished more, don't you?"

"Y-yes, Mistress. I-I must be punished." gulped Celestia as Twilight levitated the dildo back to her. Celestia squealed as she felt the dildo rub against her soaking wet pussy. Twilight pushed the dildo into her pussy, causing Celestia to moan in ecstasy, her legs shaking as she felt Twilight thrust the dildo in and out of her pussy at a fast pace.

Celestia moaned at the top of her lungs, but just as it started to feel close, Twilight had stopped, smacking Celestia on her right cheek as she gasped in pain. "Keep that right there." Twilight commanded as Celestia whimpered. Twilight rolled her eyes, giving Celestia another smack as she scolded, "Do you want a real reason to whimper, Princess?"

"N-no."

Twilight landed five more smacks at Celestia's bouncy ass, "No, what?"

"No, Mistress!"

"Good." Twilight could hear Celestia's trembling breath as Twilight began casting her futa spell, her long cock erecting from where her pussy was. She tapped the dick on her sore, red ass. "Hmm, what a nice, hot ass I'm gonna tap." A gasp came from Celestia as Twilight leaned forward, mouth to Celestia's ear. "It's been well over 900 years, Princess. I wonder how tight you'll be." She began to nibble on Celestia's ear, "If you had behaved yourself like a good, slutty Princess, I would lube this bad boy up first. It'll be like a hot shower: it'll hurt at first, but you'll start to love it!" She gave a harder bite onto her ear as Celestia whimpered, "And if you don't, I'll make you like it."

Celestia bit her lip as her body trembled in anticipation, her body clenching up. Twilight expected this and as she slowly got off from on top of Celestia, she moved down to the dildo and flipping a switch. It slowly began to vibrate inside of Celestia's pussy, getting a loud moan in her surprise, the princess beginning to purr from the stimulation.

With her body less tense, Twilght took her cock and shoved it into her ass without hesitation. She heard Celestia cry out as the pain that was shooting through her ass was worse than she imagined. Twilight pounded her like a horse in heat, grabbing onto Celestia's sore ass cheeks as she rammed the Princess. Celestia was screaming at the top of her lungs as she was roughly fucked, her tight ass feeling as thought it was being torn apart. Tears streamed down Celestia's face against as the wave of pain was being mixed with a new wave. Of pleasure. Her pussy was flowing like a river, having fallen out by now due to how rough Twilight rutted her ass and from how much of her juices leaked and soaked the bed sheets.

"Please, Mistress! Fuck me! Fuck me harder!" cried Celestia. Twilight felt a bestial growl escape her throat as she complied with Celestia's screaming, finding it in her to go harder and faster then she had before. She pumped her cock in and out of Celestia, going deeper and deeper until her newly formed balls slapped against Celestia's sore ass. It hurt, but Celestia only gave moan-filled screams.

"I-I'm cumming!" cried Celestia in a castle-shaking scream as Celestia came. It wasn't much longer until Twilight gave a final shove, shooting her load into Celestia's ass, which brought Celestia into another squirting orgasm.

Twilight panted as she slowly began to pull out of Celestia's ass, the Princess of the Sun falling onto her bed, face first, as her body twitched. A wide grin had spread across her face as she panted.

"What a...bad girl you are." Twilight managed to say, using her magic to levitate Celestia further up on the bed, resting her head on the pillows as cum dripped out of her ass, "You didn't...ask me if you could cum."

Celestia gave out a few giggles as she said, "O-oh my...I must be...punished next time then." She reached down at one of the covers and pulled it up, "But for now, may I please cuddle with you, Mistress?"

Twilight smiled, "You never have to ask for that, Princess." she said, starting to crawl up the bed to lie down next to her sub.

-The Following Morning

"I-I am so sorry, Celestia..." mumbled Twilight as she walked in with another stack of papers in her hands, "I-I should not have been so rough with your bottom last night."

"Bottom? You sure weren't shy on using more colorful language when you pounded my 'bottom'." Celestia couldn't help but giggle at Twilight's blushing. How someone as sweet and innocent as Twilight transform into someone so different was mindbogglingly. She took the papers from Twilight as she prepared her pen, "But honestly, Twilight. Don't apologize. The pain is well worth it."

Celestia was dressed in her usual royal dress, said dress being pulled up to reviel her red ass being nursed with an icepack. The Princess lying down on her belly with a wooden board on her bed so she'd be able to work while resting her ass. It was much too sore to sit and walking and standing required the aid of magic.

"I guess now is a good time to follow through on that underwear prohibition." Celestia said casually, "Putting on my panties will be very difficult with my ass so sore."

Twilight snorted as she tried to hold back her giggling, "I better not catch you with any underwear, Princess. Or it's the paddle."

Celestia gave a noticeable cringe as Twilight covered her mouth. "Twilight, if I might make a suggestion...perhaps you could go easy on my poor ass?" Masochist or not, Celestia liked being able to sit down.

Author's Note

A quick reminder that like it says in the description, the plot is mostly an excuse for clop, so you should not expect much from this fic other than a series of Twilight doming Celestia.

With that said, I will try to veer away from spanking and might try to take suggestions as to what the next scene may or may not be. No promises on either, since spanking is a major kink of mine, but we'll see.