The ultimate usurpation of Canterlot.

"Mmm~ Your fur is scented, too. Lovely. You're such a delicious mare. A fine trophy to add to my collection for my new rule." Chrysalis then rubbed her shaft and balls up against Celestia's pussy, and the musk reached her nose as she lightly blushed. The natural pheromones of lust were battering Celestia's walls of defiance.

"N-No... s-stop this, Chrysalis. Please. I-I do not want this." Chrysalis only chuckled as she moved in to kiss Celestia.

"I'm going to fuck you senseless, Celestia. When I'm finished with you, you won't even know what day it is." After that brief sentence, Chrysalis returned for her kiss as Celestia squirmed and tried everything to escape from this naughty queen. Chrysalis then saw her blush, trying to move away as she removed her lips to speak, "Is what I'm saying to you making you horny? Is my voice turning you on?"

"N-No! Get off of me!" Celestia tried her very best to push the lascivious queen off her body. But that perfume drained her strength away. It smelt so good, too. "What was in that perfume?"

"It was made by crushing up the root of the Everfree Whisperer Plant, some poison joke, and ground lavender for that lovely scent."

"P-Poison Joke? Oh, dear."

"It was a gamble, I'll admit. I've done a vague amount of research around Poison Joke. Since you're a strong and successful leader, I suppose the cruel joke would be to reverse that. Who am I to complain."

"I hate that plant."

"Well, it did produce the results that I wanted. That's all I care about."

"No! Get off of me, please."

"Make me." The queen returned for a tender kiss as she slowly pushed her cock into Celestia's now-slicked pussy. The throbbing rod slid inside into her snug and warm insides. The queen moaned in lust as she pivoted her hips and thrust them in and out of her pussy.

Celestia was screaming into the kiss. She couldn't believe this. Chrysalis had her way with her, and she could do nothing to stop her. Celestia wasn't going to surrender; however, she did everything in her power to try to escape the queen pounding into her cervix. "Go ahead and scream for me, Celestia. It's delicious."

"Mmmmaaughhh! Get off of me!" Celestia shouted as best as possible as Chrysalis's balls slapped against her butt with each thrust.

"D-Damn, bitch. You're not even a virgin. So, who was the lucky stallion or mare then?" The queen asked as she lightly hammered into her pussy to force Celestia to moan against her will.

"I-It's.. n-none of- oohhh- none of your business. J-Just get off of me, p-please."

"Nope. Sorry, I'm going to fuck you brainless, Bitch." Chrysalis then lightly hammered some more before pivoting her hips, making her cock glide up against Celestia's sensitive vaginal muscles. Celestia was gasping, then moaning from the pleasure; her legs were twitching, and her breaths were getting rapid.

"What's the matter? Is my cock that good that you want it to keep fucking you raw? Normally, I would prefer my partner to admit it openly, but I can make an exception in your case." The pleasure was slowly building up in Celestia's pussy, and she wouldn't survive for much longer against the queen at this rate.

"S-Stop this... I-I can't... keep this up... If you continue this."

"Well then, isn't that the whole point of fucking you until you're braindead? Nothing more than a pathetic and horny slut for me?" Then the queen pushed Celestia's face into her vast and soft tits to smother her while she fucked her pussy. Her moans were muffled into the queen's abundant tit-flesh, "there. That should shut you up as I work on you."

The queen then bounced and squished her boobs onto Celestia's face and head like a supple vice, gradually applying more pressure to make her whine in defeat further. "Soft, aren't they? But so powerful and dense, they can snuff the life out of any creature foolish enough to irate me. You see, gratuitous violence isn't necessary if you take advantage of your bombastic assets."

Celestia was trying to punch the queen's massive bosom, and her punches were useless as the queen's boobs only absorbed the blow of each punch, causing them to jiggle around her head. Chrysalis was chuckling from watching Celestia's frivolous attempts at getting fresh oxygen. "Free fucking and a free massage, too? I guess I'm getting the deluxe treatment then."

Celestia groaned in both aggravation and desperation. This wasn't looking good for her, and she had to do something before it was too late. "I guess you'll be getting filled with my thick and potent cream, Celly."

Celestia was flailing desperately to try to escape. She felt deep down, however, that it was already too late for her. "Have you ever heard of attacking by stratagem? Supreme excellence consists of breaking down the enemy's resistance without fighting."

"And now- oooh.. your pussy is milking my cock. I get to reap the rewards for my genius planning." She was humping into Celestia's pussy faster, like a piston, driving away from each fraction of resistance the sun diarch had. Celestia was moaning lightly now and close to giving up everything.

"That's it, Celestia, fight it! Fight back, knowing that it's fruitless. Fight back this while you're at it, too. Aahhhh." She creamed into Celestia's womb, filling it up with her seed. "Y-You're my greatest lay yet, my best conquest that I've made. Now, you're all mine, Celestia." She pulled Celestia's defeated body out from her tits to see her panting and blushing hotly.

"Y-You... came into me. I-I can't believe this."

"My cum will slowly corrupt you from the inside, Celestia. So even if you still have any resistance left, it's already too late for you to escape from my lust." Celestia felt that foul corruption slowly spreading to her toes and stomach, reaching her chest. "Say goodbye to your precious freedom and hello to a life of slavery and sex. Every day of your eternal life."

"B-Be that a-as it may, You f-foul.. harlot. M-My sister shall rescue me and s-stop you. I-I don't know how s-she will, but she'll prevail, and you'll regret this dearly..."

That corruption then covered her terrified eyes and gritted face and mane, turning it dark pink. What used to be a colorful show of bright colors of sunrise was now a paler pink, and her eyes turned green. She giggled as she snuggled Chrysalis. "What shall I do for you, my queen?"

"I'm still a bit hungry, my dear Celestia. Do you desire to have more sex with me?"

"Oh yes. I want you to rut me like a whorse."

"Your wish is my command, my consort." Chrysalis then speared back into Celestia's pussy as she whined in bliss and wrapped her legs around Chrysalis's thighs and was begging to be humped. "N-Needy little slut, aren't you?"

"Yes. I'm a needy little slut for you, my queen, my mistress. Rut me good and hard."

"I shall. I'll make our time together to be nice... and slow." She began to hump her again furiously.

Luna has woken up to begin her duties. She had already had some breakfast. Her nightly responsibilities would not be until a few hours from now. She paced back towards her room, passing Celestia's bed chambers to feel a considerable magic spike, "What is that magic I'm sensing? It's strong, and it's... foul. Sister?!"

Luna then teleported into the room past the soundproofed barrier to see a dreadful sight: her beloved sister moaning in lust as a vile creature pounded her. "What do you think you are doing?! Release my sister at once!"

"Oh? And look who's decided to join our little party. Welcome to our playtime, Luna."

"I will not tell thee again. You will release my sister at once!"

"Mmm... very well then. Oh, Celly. She's all yours. Tell me all of the things that you want to do to her right now." She pulled out of Celestia's cunt, and she allowed Celestia to stand up as she glared at her sister hungrily.

"I want to grope her, rub on her until she whines, violate her, and make her yours, my queen."

"Then have fun with her, My dearest Celestia." She giggled as she slowly approached Luna, who was backing away from her turned sister.

"Tia. It's me, your sister. This is not you. You must fight this."

"I know you're my sister, Lulu. I want you so badly."

"W-What has she done to you?" She was backing up onto the door that led out of that room. "You shall keep your distance from me, Sister." She glared at Chrysalis. "And once I subdue her to be treated, I shall purge you at the stake for this vile injustice."

Luna tried to keep her distance, but it was all to keep Celestia from pouncing on her and trying to violate her. However, once her back touched the entrance door, she was like a trapped animal with a hungry predator. Celestia managed to pounce on her to snuggle and make her uncomfortable. "Please accept this pleasure from your sister, Lulu. What I'm doing is out of... love."

"T-This is not love, S-Sister. This is lust and the worst kind, too. Get off!" Celestia was licking her face and teasing her sister. Luna was trying to break free from her corrupted sister, but this was easier said than done. "I-I said get off of me right now, Tia!"

"She's quite mouthy, isn't she? I'm sure you've got a solution for that, my dear," Chrysalis was looking at Celestia as if expecting that she knew what to do. With a lusty and deep kiss on her mouth, Celestia did indeed, "hot damn, that was fast. Well, that should shut her up."

'She's aggressive, that's for sure. I-I need to get her off of me. Is that witch also approaching me, too?!? That's not good.' Luna was trying to pry off her horny sister, only to unfortunately not be making any progress. Then the queen was right up on her as Celestia glomped Luna to the ground and lay onto her stomach; their bellies were rubbing together. "Y-You need some serious help, you vile demon. Plaguing my sister like this is irredeemable."

"Well, you're not wrong there. I need some help, and you'll be fine to add to my collection."

"Buck you, you bitch!" Chrysalis then prodded her cock head into Luna's moist cunt.

"Mmm... yes, please. I guess those words have backfired, huh?" Luna felt more of the queen's thick shaft pressing its way in.

"No! G-Get off of me, Tia... b-before she.. aauughhh..." Chrysalis's cock then speared into her pussy as it reached past the hilt and burrowed at the cusp of her cervix, "s-she's in there too deep, Tia. Please snap out of this."

"Mmmnn... doesn't that feel just sublime, Lulu? Mistress's girth is so satisfyingly filling. She feels marvelous, and you will understand my mistress's love once you reach your peak."

"P-Please.. g-get off of me, Tia, so then I m-may push her off." Luna was pinned under Celestia's plump posterior. That ass was the size of roughly two bloated beach balls as they pressed onto her chest, then she went back to rubbing their bellies together as her ass was twerking in Chrysalis's face as she gave her butt a teasing lick with her long and forked tongue.

"Hmm... as much as I enjoy having your butt in my face, Celestia, there is a much better place to put it."

"On my sister's face, my mistress?"

"It's almost as if you read my mind, my dear." Celestia then giggled as she moved her butt over Luna's shocked face.

"T-Tia... please don't... I'll surely be defeated."

"Here comes the big sunbutt, Lulu~." Celestia's giant butt sat onto Luna's screaming face as it smothered her face in her ass and muffled her screams, and the queen went to town pounding into her cervix. "Yes. Feel my divine butt on your face, my mistress's love, and your defeat, knowing that this naughty resistance was futile."

"Oh yes. After having you serve me, Celestia, and me humping into Luna, I'm getting close. Oh, Luna, are you ready to join your sister in permanent debauchery?" Luna had let out one last futile scream in defiance as both lusty mares overpowered her. "Oh, gods, yes! I'm cumming... I'm... oohhhh... yeah!" Chrysalis exploded into Luna's canal as she came into her, and Celestia chuckled, knowing what this had meant for her.

N-No... that filthy and revolting corruption is coming back. It's taking me over... but it's not Nightmare's evil this time... It's oh no... Nooo. Luna's body transformed from her typical royal blue fur into a midnight black color, and her nightly mane turned into a nebula one. Her thoughts were addled with lust and service to her new queen. Luna was lost, as well as her sister. Everything was going according to the queen's marvelous plan; this day was perfect, and it would only get better for her.