Indecent Proposal

by Shakespearicles

Rating: mature
Tags: Queen Chrysalis, Shining Armor, Twilight Sparkle, My Little Pony: Friendship is Magic, Princess Cadance, Alternate Universe, Porn, Sex, Fetish
Length: 4592

What if Chrysalis was less evil than the real Cadance?

What if Chrysalis was less evil than the real Cadance?
Cadance knows about Twilight's taboo feelings for her brother. Prior to the Canterlot Wedding, Cadance makes it clear that Shining Armor will be hers alone, and Twilight will be no part of his life anymore. When Cadance gets replaced by a changeling queen, Twilight uses the opportunity to strike a deal.

Tags: [ Extremely O.O.C. Cadance, Cervical Penetration, Oviposition, Mild Mind-Control/ Dub-Con, and of course Incest. ]

Written for the Wincest First Time February Contest
2799770

Published 2022-02-19 20:50:04 UTC
Last updated 2022-02-19 20:50:04 UTC

Silver Lining & Bartered Shining

Upon receiving the invitation to her brother's wedding, Twilight Sparkle traveled to Canterlot to help with the preparations. Though she was still a bit mad that she only just now found out about it.

"How could you not tell me about something as big as your wedding?" Twilight asked her brother. "Am I not that important to you anymore?"

"Hey, you're my little sister," Shining Armor said. "Of course you're important to me. But I'd understand if you didn't want to be my best mare now."

"You want me to be your best mare?"

"Well, yeah."

"I'd be honored."

Twilight embraced him in a hug, pressing her cheek into the nape of his neck, and burying her face in his mane. The stallion's familiar musk brought with it nostalgic memories of all the nights she'd had a nightmare, and snuggled up with him in his warm bed. She held him a bit tighter, wanting this hug to never end, and lose herself in his mane. She felt him tense in a shrug to extricate himself from her. She frowned.

"What's wrong?" he asked.

"I'm still pretty ticked that you're marrying some pony that I don't even know," Twilight Sparkle said to her brother. "When did you even meet this- Princess Mi Amore Cadenza!?"

"Twilie, Princess Mi Amore Cadenza is Cadance, your old foalsitter!" Shining Armor explained with a smile. "Oh, speaking of-"

"I hope I'm not interrupting anything," Cadance said as she walked over to them, pointedly placing herself between them.

"Cadie! We were just catching up," Shining said.

"That's nice," Cadance said. "But don't you have work to do? Somewhere else? There's a wedding to be planned for, perhaps you've heard of it?"

Shining's smile fell. "Yes, you're right Cadance. Twilight, thank you for coming to help out. I'm sure she has a whole list of tasks for you to do. But hey, it'll give you two a chance to catch up." He leaned over to kiss Cadance. "I'll see you later, dear."

Cadance held Shining as she kissed him. While Shining had closed his eyes, Cadance kept hers open and stared at Twilight, purposefully making it an extra-sloppy kiss with excessive amounts of tongue. Shining almost gagged and pulled himself away.

"Whoa, easy there," Shining said. "Save some for the honeymoon!"

"What can I say?" Cadance said. "I'm just excited."

"I'm excited too, but geez, my sister is right there!" he said. Cadance smirked and waved as Shining left. Once he was out of sight she turned on her heel and glared at Twilight.

"Let's get one thing straight. You're only here because I was forced to invite you. Shining is my stallion!" Cadance said as she jabbed Twilight in the chest with her hoof.

"Wh, wha-?"

"Don't play dumb with me, slut! I'm the Princess of Love! I know how you feel about him! I've know about it for years. Even if I couldn't sense it, I could practically smell you creaming yourself when you hugged him! I don't give a shit if you're his little sister. I'll tell you the same thing I'd tell every other whorse that wants to fuck the Captain of the Royal Guard; you stay the fuck away from my stallion! You better not ever be in the same zip code as him again after this. Once we get married, he's moving into my villa in the palisades. And I better not ever catch a whiff of your rotten crotch, or so much as find a single one of your hairs there or else I swear to Celestia, I will shove my hoof so far up your skinny ass that I'll be punching your ugly teeth out! Got it!?"

Twilight's mouth was agape in shocked awe. Cadance's blue aura of magic grabbed the list from her bag and threw it on the ground in front of Twilight.

"Here's the checklist of everything you need to do. Try not to get your slut juice on it. You'll see that the list doesn't have 'fucking my future husband' on it, so I better not catch your skanky ass trying to get alone with him again. Now shut your cock-holster and get to work!"

That evening, Twilight and her Ponyville friends sat around a patio table to chat, and for Twilight to complain.

"What a party pooper!" Pinkie Pie said.

"I'm glad I was busy training the singing birds," Fluttershy said.

Applejack drank her cider as she tried to console her friend. "She's getting married, Twi. Lot's of mares turn into a bridezilla. I'm sure it's just stress getting on her nerves. What exactly did she say to you?"

Twilight left out specific details when describing her interaction with Cadance. "It was a lot of colorful language. But the point is she's turned into a see-you-next-Tuesday."

"Well I don't know about the rest of you, but she did make a point of telling me to stay away from her stallion," Rarity said between sips of her Manehattan Iced Tea. She tousled her mane. "I get it. She's threatened by my beauty. And to be fair, Shining is..." Rarity bit her lip and rubbed her thighs together. Twilight's other friends at the table murmured in agreement.

"Don't let Cadance hear that," Rainbow Dash said. "I joked about it and she didn't think it was very funny."

"Rainbow, what happened to your eye?"

"I fell down some stairs."

"Dash, did she-"

"I FELL DOWN SOME STAIRS, OKAY!?"

"Are you going to object at the ceremony, Twilight?" Fluttershy asked.

"I was planning on it," Twilight said. "Will you all join me?" The other mares looked down at the table.

"Apologies, darling," Rarity said. "But Cadance is scary. And I don't much want to have 'my ovaries ripped out,' as she would say."

The other's nodded. "Hopefully she'll chill out after the wedding, Twi. Otherwise..." Applejack trailed off and shrugged. "Well, you have my condolences."

Twilight worked quickly to finish making the centerpieces on the reception tables. She usually loved checklists. But this one brought her no joy. She made sure to avoid Shining, and made especially sure to avoid Cadance, too. But she could not avoid crossing paths eventually.

"Ah, there you are!" Cadance said, looking like she'd already eaten a whole wedding cake. She cornered the lone mare in the reception hall. "I've been looking everywhere for you. How are the preparations coming along?"

"F-fine," Twilight said nervously, shrinking away from the other mare.

"Have you seen Shining? He was looking for you earlier."

"No! I haven't seen him, I swear!"

"Is something wrong? You seem upset. This is a special occasion for your brother, be sure you make time to spend with him, too."

Twilight looked around them in confusion. "Is this- some kind of trick?"

Cadance smiled and shook her head. "This is a wedding! No tricks. Only treats! Which reminds me-" Cadance trotted off to grab a gift bag for Twilight. "As thanks for all your help." She levitated the bag over to her with her green magic.

Twilight looked down at her gift bag and back up at the other pony in bewilderment. "Okay, who are you, and what have you done with Cadance?"

Cadance blanched and slammed shut the reception hall doors with her magic. "How did you know!?"

"Wait- WHAT!?" Twilight panicked.

"How did you know I'm a changeling?"

"A changeling!?"

"Queen Chrysalis, of the changelings. We feed on love. And as queen, it's my duty to bring food back to my hive. I took Cadance's place last night. I don't mean any harm for your brother. I barely even need any mind control for him."

"Mind control!?"

Chrysalis shrugged. "Sometimes ponies need to be... persuaded to overlook changes in their partner's character. I could completely enthrall him if I needed to make him do something. But it sullies the love, so I prefer to keep him mentally intact as much as possible."

Twilight's mind was spinning with questions. "What about Cadance?"

"She's alive! I swear. Changeling magic can't impersonate a dead pony. She's being held prisoner back at the hive."

"Oh." Twilight reacted as calmly as somepony being told the weather forecast called for clouds.

Chrysalis looked confused. "Does that not... upset you?"

"Not really. She was kind of a bitch."

Chrysalis snorted. "Tell me about it. She did not go easily. She'll produce some fine warriors for sure."

"Produce?"

"She's being kept as a breeding vessel, tended to by my best drones. Changeling eggs need to be fertilized and nurtured inside a mare, until she lays them when they are ready to hatch." Twilight wore a vindictive smirk imagining Cadance getting hilariously gangbanged.

"So what are you going to do now?" Twilight asked. "I know you're an imposter."

"What will it take to keep you quiet?" she asked.

Twilight blushed. "Could you- you know, get somepony to- could you get Shining to... you know?"

Chrysalis could sense Twilight's lust. "Oh? Oh! Forbidden love!" Chrysalis licked her lips. "Spicy!" She put her hoof to her round belly. "I've been gorging on your brother's love since I arrived, and I'm nearly full. That mean's I'll need to lay soon. I was hoping to have him fertilize them so I could put them in Cadance, but since we're making deals..."

Chrysalis, still disguised as Cadance, walked with Twilight back to her guest room and locked the door. "I need a guarantee from you that you'll keep your end of the deal. You want your brother's foals? You'll have them. But first, you must serve the hive," she said as she cradled her belly in her hooves.

Twilight shuffled her hooves nervously. "So... what do I need to do?"

"You don't need to do anything," Chrysalis said. "You don't even need to be conscious. In fact, you may prefer it that way."

"Wh- why!?"

"I try to make it as painless as possible. But it can still be quite uncomfortable," Chrysalis said.

Twilight was having second thoughts.

"Perhaps this will help?" Chrysalis's form shimmered, changing from Cadance to Shining Armor. Twilight stepped forward and put her face into his mane.

"You even have his scent right..."

A rush of Twilight's lust washed over Chrysalis, making her stallion form stagger a moment from the rush. Her sheath swelled and Shining's penis slid out, going from floppy to rigid very quickly.

Twilight leaned down to stare at it unabashedly. The fleshy shaft was mostly whitish-pink, mottled with blotches of blue the same as his mane. "Is that really-?"

"Yes. This is exactly as it appears. I pride myself on my accuracy, Twilight," Chrysalis said in Shining's voice.

Twilight shivered and practically melted on her hooves. "Please, call me Twilie."

"On the bed, Twilie,"

Twilight climbed onto the bed and rolled over onto her back. Chrysalis stood at the edge of the bed between her legs and kneeled down in front of her, pulling her ass to the edge of the bed and holding onto her thighs to spread them. Twilight looked down at the stallion between her legs. Shining's eyes looked back at her. Chrysalis leaned forward and put her whole mouth over Twilight's vulva, giving it a long, wide lick before probing her tongue inside.

Shining Armor might not have had a three-foot long tongue, but Chrysalis did. She snaked it deeply into Twilight vagina, coating it with her spit. The tip of her tongue found its goal, the tight entrance of Twilight's deepest barrier. She gave Twilight's cervix a vigorous licking, the tip probing at the entrance to her womb, slowly squirming its way inside to give the interior a similar treatment, making the mare feel a flurry of butterflies in her stomach.

"What are you doing?" Twilight asked between panting.

Chrysalis retracted her tongue to speak. "I'm doing this for you as a courtesy. In addition to being an aphodesiac, changeling saliva is also a muscle relaxer and an analgesic. It'll help with the next part."

"Next part?"

Chrysalis stood, and reared up to put her hooves on either side of Twilight. Twilight looked down at the sheer size of her brother's penis, laying against her belly in clear indication of just how deep it would go. Whatever fear she might have felt melted away into excitement as a fog of lust clouded her mind.

Chrysalis adjusted herself and brought the tip to Twilight's pussy, smearing it with green pre-cum before stuffing it inside her.

Twilight gasped in ecstasy as she felt her brother's penis slide inside her. It felt even better than she ever imagined. Chrysalis started thrusting. Twilight was already more aroused than she had ever been before. Her vaginal muscles spasmed and twitched as the medial ring slipped inside, moving back and forth across the g-spot. Twilight came easily and often, her copious wetness spurted from her pussy in lewd squelches each time Chrysalis went a little deeper, soaking the bedding.

Chrysalis pressed her hips against Twilight's, making the blunt tip of Shining's penis just barely kiss her cervix. Chrysalis smirked. The siblings really were a perfect fit for each other, like lock and key. She looked down at Twilight's eyes. Twilight looked up into the safety of her brother's deep blue eyes. Chrysalis thrusted a bit longer, drinking in Twilight's wanton love and lust. She hilted once more and her shaft pumped a few more thick spurts of changeling secretion through Twilight's cervix, helping to numb it and make it more pliable.

"Shiny..." Twilight mumbled as her tongue lolled out and her eyes were half-lidded. She was as ready as she was going to be. Chrysalis backed off just enough stay inside her, but enough to swing Twilight's leg across and roll her over. She always preferred to take a mare from behind for this part.

Shining's penis morphed inside Twilight from a blunt head to a the lengthy, pointed tip of Chrysalis's ovipositor. She pushed forward again slowly, carefully feeling for the small opening to her womb. With a practiced motion she slowly eased the tip in. Twilight's dull expression winced as her cervix started to stretch open around the widening taper. "Shiny!" she whimpered.

"Just relax," Chrysalis said in Shining's soothing voice. "If you tense up, it'll only hurt more." Twilight grimaced at the alien feeling inside her and tried to squirm away, but the muscle relaxer coursing through her body affected everything. Shining's strong hooves gripped her hips, keeping her from escaping. Chrysalis pushed a bit harder. Twilight squealed. Chrysalis put a pillow in front of her. "Bite that if it helps."

"It feels really weird! Like a bad cramp!" Her legs kicked back weakly in futility.

"Come on now Twi! You're tightness is very impressive, but knock it off." Chrysalis said. Twilight grabbed at the pillow, at anything to get away. "If you can push out an entire foal, you can take a few little eggs. Just remember why you're doing this. Now stop being so stubborn and just open up your cervix for me!"

"How, exactly!?" Twilight whined indignantly. "I can't control it! It's not like there's a yoga pose for that!"

Chrysalis felt her belly rumble. "These eggs are getting laid now, whether you want them anymore or not. And this will all go a lot faster if you just hold still and relax. So stop fighting it and Let. Me. IN!" Chrysalis pulled Twilight's hips back against hers, finally getting the full tip of her ovipositor inside Twilight's womb, making the mare yelp into the pillow. "Ah! Finally!"

The tip of Chrysalis's ovipositor blossomed open wide inside Twilight's womb, ensuring that it would stay locked inside the mare during the delivery. The changeling grunted and her shaft pumped and throbbed, its powerful muscles squeezed the egg up her shaft. Twilight could feel the bulge moving up along the ovipositor inside her, getting to the narrow point of her cervical opening. Chrysalis grunted and pushed, the muscles of her ovipositor forcing the egg through, and stretching Twilight's cervix just a bit wider before safely depositing the egg inside the mare's fertile uterus. Twilight shrieked into the pillow. The sharp stretching sensation cut through the numbing effects.

Chrysalis leaned closer and whispered into Twilight's ear, "That's one."

Twilight felt the next egg coming right on the heels of the first one. She gripped the pillow and braced herself for what she knew was coming, helpless to stop it. Chrysalis grunted and pushed again, pumping the next egg through. It was graciously not as painful as the first time. Which was good because more was on the way. Chrysalis pumped egg after egg deep inside the helpless mare who could do no more than hug the pillow and whimper as she felt each one pushed inside her womb until it was packed to capacity.

"Come on, come on," Chrysalis grunted in frustration and forced one last egg inside. Chrysalis sighed in relief after she pumped out her final egg. After a long minute, her ovipositor wilted and slowly slid out of Twilight's stuffed womb. The resilient muscles of Twilight's cervix sealed closed, ensuring that Chrysalis's precious clutch of eggs would remain safe inside the mare, to be carried to term once they were fertilized by a stallion's seed.

Twilight rolled onto her side, panting to catch her breath and she held her belly with her hoof. Chrysalis looked over at Twilight's rounded abdomen, knowing well the discomfort of carrying such a load. Between the two of them, she felt that Twilight wore the look better. She didn't look pregnant. Not really. She just looked like a mare that had a bit too much cake.

Still disguised as Shining, Chrysalis laid down next to her. "My old record was twelve. But your love for your brother was so intense..." she shivered. "I went right ahead and made it a baker's dozen!"

Twilight groaned.

"How do you feel?"

"So full."

"Are you in pain?" she asked.

Twilight shook her head. "No. Not anymore. Just... a little bloated."

Chrysalis nodded. "That's good. It only hurts sometimes during the laying process. That's why we usually put the mare to sleep for that part. We're not monsters, after all." Twilight had a bit of trouble trying to move off the bed. "Just sit tight. The grogginess will wear off in about twenty minutes or so."

"You had better honor our arrangement," Twilight said.

Chrysalis smiled with Shining's big, goofy smile. "Oh, you don't have to ask me twice! After all, it's in my best interests that those eggs get fertilized! And if it's by somepony you love, it'll be so much the more nutritious for my babies."

"How are you going to talk him into it?" Twilight asked. "I don't want you completely enthralling him."

Chrysalis's body shimmered and transformed back into Cadance. "Leave that to me. I can't make him feel love for you that isn't already there. But as for you, the unfertilized changeling eggs inside you will start to simulate estrus. The amount of pheromones you'll be pumping out should make you quite irresistible to any stallion. Just play along when I get back. If there's even a spark of lust in him for you, it'll become a blaze!" She headed out to fetch Shining. "See you soon."

"But she seemed fine when I saw her the other day," Shining Armor said to 'Cadance' as he walked through the castle hallway.

"I think she's just feeling a little low on self-esteem," she said. "She just needs a little pep talk." They got to Twilight's suite and opened the door. Twilight was waiting on the bed.

"Hey Twilie, what seems to be wrong?" Shining asked.

"I was just telling Shining about how you were feeling low self-esteem, how you don't feel pretty, or attractive. So I asked him to come talk to you and assure you that you are. Right?" she said with a wink to Twilight.

"Come on Twilie, you know you're pretty!" Shining said.

"You really think I'm pretty?" Twilight asked with her best doe eyes.

"Well, yeah!"

"But do you think she's attractive?" Chrysalis asked in Cadance's voice.

Shining stammered, "Well- I mean, like, objectively, yes."

"I think what Twilight wants to know is if you think she's sexy!"

"Cadie, I- I don't think that's something that I-"

"So I'm not sexy!?" Twilight cried. "Always a bride's mare, never a bride! Forever un-fuckable!"

"Shining Armor! I never thought you could be so cruel to your own sister!"

"I wasn't trying to be!"

"Shining, unless you actually think she's not sexy, then you should be able to say, out loud, that she IS sexy!"

"Okay! Yes! Twilight, you are sexy."

"You really think so?"

"Y-yeah, of course!"

"Every part of her, right!?" She grabbed Twilight's tail and lifted it.

Shining averted his eyes. "Cadie, come on! What are you doing!?"

"What's wrong?" Chrysalis asked. "Does she have an ugly pussy?"

"I knew it! I have an ugly pussy!" Twilight cried.

"Shining, it's not like you've never seen one before! Just tell her she has a nice pussy!"

"I'm sure it's nice!"

"Yeah, so nice you can't even bring yourself to look at it?" Chrysalis asked. Twilight looked back over her shoulder and waited. Shining huffed and turned back around, looking mostly at the ceiling. "It's down here, champ." Shining's eyes lowered and he forced himself to look at his sister's pussy.

"Yes, it's nice. Perfectly normal. Now can we please-"

"Are you standing so far away because it smells bad?"

"Wh- what!?"

"Shining, you know how sensitive mares are about their fragrance!"

"I'm sure it smells fin-"

"Talk is cheap! Get over here!" her green magic grabbed him by the ear and pulled him closer to Twilight's display. "Now actually smell it!"

At such a close range, Shining kept his eyes clenched to try to save what little was left of their collective dignity. He pretended to sniff. "Yeah, fine!" A pink hoof jabbed him in the ribs, making him take a sharp breath. His nostril flared reflexively, filled with the heavy aroma of a mare in the throes of an especially-powerful estrus.

"Good, yes?" she asked.

"Y- yeah..." Shining breathed. He started panting and his heartrate bounded, getting her intoxicating pheromones to his addled brain even faster.

"Well, smell is only half of it!" A hoof on the back of his head shoved his face forward into Twilight's very wet pussy, smearing his face with her juices, getting it up his nose and in his mouth when he tried to speak. Shining's hooves tried to push himself away, but felt his resistance become more fleeting with each passing second. "Good yes?" She asked him again, winking at Twilight. Shining nodded. "Good enough to lick?" Shining didn't even answer. He began to obediantly lick Twilight's pussy, slowly at first, and then with growing happy gusto. Chrysalis glanced underneath him at his growing erection. "Hey Twilie, I think he likes it!"

A green aura of magic wrapped around Shining's growing erection, stroking it to full mast. "I think I know a good place for this to go. Nice and deep inside this sexy mare's pussy!"

A small voice of reason cut through Shining's haze. He took a step back and shook his head to try to clear it. "Yeah a- uh... N- no, she's- Twilie is-"

"A sexy mare with a nice pussy that smells and tastes good, right? Those were your words!"

Shining nodded. "Sexy... mare."

"Please, Shiny!" Twilight begged. "I want it!"

"She said please, like a good pony, right?"

Shining nodded.

"Good ponies get a reward." A light green aura wrapped around him and gently helped him move forward, lifting him up to lay him on top of Twilight. A pink hoof held his shaft and gently guided it. "And... in we go..." With just another small nudge, the tip of Shining Armor's dick was inside his sister's pussy. His hip's flexed on reflex, pushing himself forward. "There you go! I bet that feels good, doesn't it?"

"So... good," Shining groaned.

"So good!" Twilight moaned.

"See? She loves it! She loves you! Just like you love her, right?"

"Love you, Twilie."

"I love you too, Shiny!"

"Show her how much you love her now!"

Shining started thrusting. Despite Twilight having felt a clone of it just earlier that day, knowing that it was the real thing just made it so much more intense. And now, just as then, when he hilted her, it was a perfect fit. Filling her completely, but not uncomfortably. His length, thickness, and contours matched her exactly. It was bliss.

Chrysalis laid down in front of Twilight and watched her through Cadance's eyes. She could see the ecstasy she was feeling. Her eyelids would flutter each time she came. The wet slaps of their hips smacking together became splashes as her pussy drenched his balls in her climax.

"You're making her cum so much! You're making her so happy!"

Shining was euphoric as humped just as deeply as he could into the fertile mare under him. Chrysalis's magic surrounded Shining's balls, imbuing them with extra potency. She was not a queen that took chances. She would ensure every last egg was fertilized.

Shining winced, feeling his balls throbbing with an extra fullness. It hastened his approach to the brink.

"Gonna- Cum!" Shining started to step back but Twilight's magic shoved him forward before even Chrysalis could.

"Inside! All inside!" Twilight squealed.

"That's where a brother's cum belongs," Chrysalis said.

Shining redoubled his grip on Twilight and wrapped his hooves around her, falling forward with her and her front legs gave out. With her face down and ass up, Shining drilled down into her like he was prospecting for oil, bottoming out into her one final time. His tip flared as he pressed it squarely against her cervix, lined up perfectly with her opening. He cried out as he came harder than he ever had before, courtesy of Chrysalis's spell. Twilight could feel each throb and pulse of her brother's penis, pumping load after load, delivered as deep as he could for the sole intention of procreation.

Chrysalis cast her spell on his balls again, instantly refilling them. Shining cried out as he continued to cum even harder. Chrysalis's magic gripped his shaft even more than Twilight's muscles and expertly milked it, ensuring every last drop made it into Twilight's womb, thoroughly drenching every single egg inside in a generous coating of his extra-potent cum.

Twilight's hind legs started to waver. Chrysalis carefully lifted the two of them together, cradled in her magic, and carried them toward the bed. She grabbed the tie from a bathrobe to wrap around their hips, binding them together. She laid them down together in the bed gently, with him still balls deep inside her, to ensure that none would leak out.

She climbed into bed beside them and pulled up the covered. She leaned over to whisper to them, "After the wedding, Twilight can come live with us, and we can do this every day, because you love her. You love her forever!"

"Love you, Twilie. Forever."

"Love you too, Shiny!"

Chrysalis licked her lips. It had been a sumptuous banquet. She smiled and basked in the afterglow of their delicious love. It would be enough to feed two hives! As she ran her pink hoof over Twilight's belly, she realized she might soon have exactly that.

"This is going to be the start of something good."