Middle-Mare

by Shakespearicles

Rating: mature
Tags: Porn, Sex, Shining Armor, Twilight Sparkle, Drama, My Little Pony: Friendship is Magic, Princess Cadance, Fetish
Length: 7210

Because sometimes, when you really want something, you have to go through the middle-mare.

Twilight wants to have a foal, but she doesn't even have a stallion. That's okay, she can always get a sperm donor. She has a very specific donor in mind, but unfortunately, he's married. She won't let that stop her, but sometimes, when you really want something, you have to go through the middle-mare.

Tags: Orientation play, Cadance being a dommy mommy, Twilight being submissive and breedable, intermittent semi-dub-con, cunnilingus, squirting, snowballing, mare cum, regular cum, excessive cum, cumflation, strap-on, and incest, actually no incest, well kinda incest. A wholesome ending.

Written for the Wincest April'23 Proxy Contest.

2522261

Published 2023-04-02 01:40:04 UTC
Last updated 2023-04-02 01:40:04 UTC

Making a Deal

"Thanks for looking after Flurry again for us," Shining Armor said. "We've been so busy making sure the Crystal Palace is ready for the delegates summit. We really appreciate you getting here early to help out."

"Of course," Twilight Sparkle replied. "The best aunt ever always looks forward to spending more time with her!"

Cadance smiled. "That's how I know you'll be the best mom ever one day too." Twilight's smile softened slightly. "I know I don't have to remind you, but please let us know if there's anything you want while you're here as our guest in the empire."

Twilight glanced at Shining and then looked back at Cadance. "Yes, thank you, of course."

They smiled and turned to leave. Cadance leaned over and kissed her husband on the way out.

That evening, Princess Cadance sat by the fireplace in the den of her palace suite. She swirled the dark red drink in her crystal goblet, enjoying the quiet of the night's small hours. There was a knock at her door. "Come in."

Twilight Sparkle walked inside. "You wanted to talk to me about something?"

Cadance nodded and motioned to the plush seat across from her to sit. "There is. But first..." She poured her a glass of wine. Twilight sat but hesitated. "It's not bitter, I promise." Twilight took a small sip, indeed finding it to be more sweet than she was used to for wine. Cadance waited for her to become more comfortable before continuing. "The Crystal Empire has so much more to offer you than just the library, Twilight."

"I know that."

"I have an entire task force of staff at your beck and call. Palace Chefs who have gone to years of culinary school to create masterpieces, so much more than the meager daisy sandwiches you ask for."

"Well, I don't want to be a bother..."

"The masseurs' in the palace spa may not be unicorns, but you'd believe they have magic in their hooves."

"I don't need that, really."

"The Crystal Bards troupe-"

"Cadance!" Twilight snapped. Cadance paused and sipped her wine. "I'm sorry," Twilight apologized. "I know there's all these things here but I just... I'm just not used to the idea of being served on."

"You mustn't think of it that way, Twilight. These ponies... They're not slaves. They get paid very well. And moreover, they chose this job. They competed fiercely for the opportunity to show off their talents for you." Twilight looked at her. "Yes. You have fans here, Princess. They want so much for you to let them impress you."

Twilight put her hoof to her chest and took a deep breath. Then she exhaled and pushed it away, pushed her worries away, and blew away her anxiety. After a moment she nodded in frustration. "I... yeah, okay, I get it. I will... try to do that."

Cadance gave her a soft smile. "I know you like to think you're above getting stressed out nowadays. But you're only fooling yourself. And I need you to have your head in the game for the summit later this week. What's the first thing I taught you about negotiating?"

"Leave emotion at the door."

Cadance chuckled. "Okay yes, that actually is the first thing. But I meant once you're actually at the table."

"Negotiate from a position of power," Twilight recited.

"Precisely! Twilight, these ambassadors... they can smell fear. They've been trained to. If you show any kind of weakness, they'll eat you alive."

"You have a strange way of trying to help my anxiety."

"I didn't ask you here tonight to blow sunshine up your ass. I'm trying to make sure you've got your shit sorted out. So let's figure out what you need for that to happen."

Twilight winced, but only for a moment before she nodded. She was no stranger to Cadance's tough love when she needed to hear it. She shrugged and looked down at her drink. She finished her drink and set the empty glass on the table between them. "I don't know. I'm a princess! What could I possibly need?"

Cadance swirled her own wine and also finished it. "Okay... Let's take a step back. Maybe need is a strong word. What do you want?" she asked. Twilight looked away at the fireplace. "What do you... desire?"

And there it was.

Twilight felt her cheeks getting warm. Was it the fire? No, not for just her face. She was flushed. Was it the wine? No, not the wine either. It was a blush.

Cadance could feel the short hairs standing on the nape of her neck. She poured two more glasses and leaned back in her seat. "You know, Twilight, I've never seen you happier than when you're with Flurry. I understand that joy. And I do remember that want, that need... to be a mother."

Twilight's eyes glistened before she quickly blinked it away.

"You know... as royalty, your marriage could be a very powerful bargaining chip. Prince Abraxas of Zebrica will be at the summit. You know what they say, once you go striped..." Cadance joked. Twilight either ignored or didn't hear her. "Queen Rain Shine's son is only a little younger than you... I do hear the Kirin are quite fiery lovers..." Twilight remained unmoved. "I did catch wind of a rumor from Mount Aris that Sky Beak finalized his divorce..."

"No," Twilight said at last.

"No? Will there be somepony else there that you had in mind?" Cadance asked.

And there it was.

Twilight tried to cool the warmth in her cheeks with more wine. She glanced at Cadance from behind her wine glass.

Cadance smirked back at her. "Come now, Twilight, you really must learn to not make it so obvious."

Twilight nearly choked on her drink. "W-what!?"

Cadance rolled her eyes. "I've known you for most of your life, Twilight, I'd have to be blind to not notice. I didn't even need to use my love magic."

"I... I don't know what you're talking about!"

"Lie to yourself all you want. But don't lie to me about this! It's insulting to both of us."

Twilight's lips trembled as her composure broke. "W... when?"

Cadance scoffed. "Where to even begin!? From the first time you caught us playing spin the bottle and every time I kissed him afterwards. I could feel your eyes on me, burning with jealousy. The wedding. The baby announcement!"

And there it was.

Twilight felt herself bristle. She looked at Cadance. Cadance just nodded at the fur standing up on Twilight's limbs. Twilight looked at the floor. "Is it really that obvious?"

"No," Cadance assured her. "Just to me. It's my special talent to notice such things. Like the way you glance at him whenever you think I'm not looking. The way your eyes linger on his body far longer than you mean to. The way you carry your tail just a tiny bit higher when he's in the room."

"Okay! I get it!"

Cadance sipped her drink. "Twilight... do you hate me for marrying him?"

"No, of course not!"

Cadance looked over her face. There was no lying there. But... "Do you hate yourself for the way you feel?" Twilight's mouth opened, but no words came. "You shouldn't," Cadance added quickly. "You've done nothing wrong. And we don't get to choose who we fall in love with. And believe me, I know."

"Does he..."

"No. He has no idea. Don't worry."

"I meant..."

"Oh. No, I'm sorry Twilight. He doesn't feel that way about you." Her horn glowed for a moment. "I checked."

Twilight glanced at Cadance's horn. "Could he? I mean, could you... with your magic?"

Cadance frowned at her. "You would ask that of me?"

Twilight looked at the floor in shame. "No. It wouldn't be fair to him."

"No pony should have that power."

They sat there with nothing but the sound of the dying fire for a long while.

"I'm sorry, Twilight," Cadance said, drinking her wine. "I really am. I know how it feels to love somepony who doesn't love you back in the same way."

Twilight looked at her in confusion. Cadance looked back at her. Twilight looked at her, looking back at her, and saw her, as though for the first time, not just the mare who married Shining. She felt her stomach flutter. "Cadance?"

She nodded.

"But... but I don't even like mares that way."

Cadance just smiled softly. "I know, Twilight. I know... But I do. Just as much as I like stallions. And as surely as I love Shining. And had things been different, I might just as soon have married you."

"Cadance, I... I don't know what to say... I'm sorry?"

Cadance shook her head. "Don't be. As I said, you don't get to choose who you love. And neither can I."

"But couldn't you..?" Twilight motioned to her horn.

Cadance shook her head. "No, Twilight. I can only remind ponies of their love. I can't make them feel a romantic love that was never there in the first place. Even if I wanted to." She leaned over and put her hoof on Twilight's leg. "And I did want to, Twilight. So very badly."

Twilight looked down at Cadance's hoof on her and swallowed hard. "Am I... Is that how you know you can't?"

Cadance nodded.

Twilight sat in wonder for a long moment. "Had things been different..." she trailed off. "What about Flurry Heart?"

Cadance sat back and smiled. "Oh, I'm sure we would have still had Flurry." Twilight raised an eyebrow at her. "Twilight, two halves can't make a whole without a pole. Even if I didn't outright marry him along with you, he would still have been my first choice for a sperm donor."

Twilight snorted. "Yeah... Me too, I guess." As quickly as it appeared, the smile ran away from her face. "But we can't always get what we want, can we?"

Cadance's expression turned serious. She drank the rest of her wine and threw the glass to shatter into the fireplace. "Not with that attitude! If you want something bad enough, you negotiate for it!"

"What are you talking about?"

"You want Shining Armor for your sperm donor?" Cadance asked as she grinned. "I can make that happen!"

"So... what's the catch?"

Cadance smiled. "Well, now... I have something that you want... to make a deal." She stood up and walked around behind their chairs. "Therefore, there must be something that you have... that I want... to make a deal. And it just so happens that there is something that I want." Twilight felt Cadance's hoof on her shoulder. "Something that I have wanted for a very long time."

Twilight swallowed nervously. "But Cadance, I'm straight."

Cadance leaned over and whispered into her ear, "So is spaghetti until it gets wet." Her horn glowed. A pulse of her magic radiated out and washed over Twilight's body with a tingling warmth before it settled into her lower abdomen. It didn't quite make Twilight orgasm, but one could be forgiven for thinking so from the way the younger mare reacted, and the dark patch of dampness spreading into her seat cushion.

"That's a neat trick," Twilight breathed.

Cadance almost looked indignant for a moment before she grinned again. "Tricks are for street whorses. And I don't need magic to make you feel wonderful." Cadance's hoof drifted lower along Twilight's body. "By the time I'm done, you won't even want Shining anymore."

Twilight bit her lip and shifted uncomfortably in her seat, squeezing her thighs together in a vain attempt to stem her leaking pussy. "No, I don't want that. I just want him."

Cadance's smile softened. "A pity. But no matter. I can still get what I want." She walked back over to her chair and settled in lower, letting her butt slide forward to the edge of her seat and she spread her legs. "Well? Go on then!"

"What?"

Cadance just rolled her eyes. "You've told me what you want. And I've made it quite clear what I want from you in exchange." She pointed at her marehood.

"But I just told you that I don't want to do that," Twilight said.

"I know. But that's what gives it value in this exchange. Aside from my own intrinsic enjoyment of it," Cadance explained. Twilight pursed her lips. "I won't force you to do anything, of course. But then, I don't have to give you Shining's semen, either. Be my mare tonight, and you may have his seed in the morning." She held her hooves out. "Those are my terms. Take it or leave it. So, do we have a deal?"

Twilight chewed her lip as she considered it. Changing teams for one night to finally have the foal she always wanted. After a long minute, she nodded.

"Well then..." Cadance motioned to the floor in front of herself.

Twilight slowly got up from her chair and walked over to Candance and knelt down in front of her, clinically examining the other mare up close, the way a foal winces at a plate of brussels sprouts.

"Here, why don't we start with something easy?" Cadance suggested, holding the back of Twilight's head with her hoof to move her up away from her crotch to her teats. "Start here. This you are familiar with, yes?" Twilight raised an eyebrow. "I know for a fact that you were teat-fed as a foal. Shining told me about it at one point. I recalled sensing some intense jealousy over it."

Twilight balked. "What!? Shining has the hots for Mom?"

"You're in no position to pass such judgment. And no, it was not a sexual jealousy. It was a typical, juvenile jealousy of the attention you were taking away from him as the new foal. However, the more pertinent issue is that Flurry was last fed several hours ago and they're now quite heavy with milk. So, if you would be so good?"

Twilight held one of Cadance's teats with her hoof and gave it a gentle squeeze, causing a small stream of her milk to squirt out. She gave it another squeeze and more milk came. Cadance slapped her hoof away. "I didn't mean for you to milk me like a cow! Don't be so wasteful!" She pulled Twilight closer.

She got the hint and leaned forward to give her teat an experimental lick. Her milk was much more heavy, creamy, and sweeter than Twilight's usual soy coffee creamers. She gently kissed her nipple, taking it into her mouth with the slightest suck. Cadance's hoof on the back of her head pressed Twilight's face into her plump teat, flooding her mouth with her milk.

Twilight's head shot up with a worried expression and her cheeks ballooned out.

"Don't you dare spit that out!" Cadance scolded. "If you want Shining's milk inside you tomorrow, you need to take all of mine first! I want to sleep tonight knowing you have a belly full of me inside you!" Twilight winced and swallowed. It was actually quite good. "Now get the rest."

Twilight went back to suckling Cadance's teat. With a lecherous grin, Cadance watched Twilight's throat flex each time she swallowed more of her milk. Her hooves carefully pawed her teat, gently massaging and squeezing the rest of her milk out. "Good. Now empty the other."

Twilight did as she was told, suckling the other teat just as she had done the first. Cadance's magic glowed underneath her, sneakily playing with herself as the other mare nursed on her, a duet of pleasures. A small tendril of her magic teased her clit and another larger one pushed inside her marehood, pressing against that one spot inside in just the right way. She quickened her pace, feeling a different pressure building as Twilight finished swallowing the last of her milk from her other teat.

At the last moment, Cadance's hips bucked in orgasm, and Twilight's surprised face got sprayed with syrupy gushes of Cadance's mare cum.

Twilight grimaced. "It went up my nose!" she whined.

Cadance laughed. "Now get in there and lick it until you love it!" Her magic pulled Twilight forward again, with her mouth cupping Cadance's vulva. Twilight did as she was told, nervously at first. Cadance stroked her mane and looked down at her with adoring eyes. Twilight looked up at her from between her legs. "Do you have any idea how long I've fantasized about this? How many times I've rubbed one out imagining how you'd look between my legs like this?"

Twilight couldn't talk with her mouth full.

Cadance just looked at the object of her affection with her muzzle buried in her marehood, feeling her tongue attempting amateur cunnilingus. She thought that as a mare she would at least know what would feel good for another mare. Cadance pressed Twilight's face into her pussy a bit more firmly, rubbing her nose against her winking clit to give it some stimulation before just seeing to it herself with her hoof. Her breathing quickened. "Oh yeah... OH YEAH!" she moaned louder as her hoof moved faster. The pressure built up inside her quickly. Twilight could tell she was getting close to cumming again. "Oh yeah, this is gonna be a big one!"

Twilight tried to pull away, but Cadance's thighs clamped down on the sides of her head. "F-FUCK!" Cadance cried out as she came even harder. Twilight tried to squirm away but the older mares thighs had a firm grip on her. Twilight felt Cadance flooding her mouth as she squirted. She snorted panicked breaths through her nose as she felt her mouth filling to capacity, but Cadance didn't let go.

"Spitters are quitters!" Cadance said between her moans. "Your brother's no quitter. Are you!?" Twilight was unconvinced. Cadance gently put her hoof over Twilight's nose. Her eyes went wide with panic, unable to breathe. "Swallow it!" Cadance commanded. Twilight winced and Cadance almost immediately came again watching Twilight's throat flex. "Open your mouth." Twilight opened her empty mouth, showing Cadance that she had swallowed all of it. "Good girl. Now, over there," Cadance directed her to the full length mirror on the far wall. Twilight got to her shaky hooves and walked over to it.

Twilight felt Cadance's hoof on her shoulder, pushing her down onto her knees on the floor in front of the mirror. Twilight watched the reflection of the other mare step over her. Cadance reared up to lean against the mirror with her hoof. Twilight looked up but Cadance held her head still as she sat down on Twilight's horn, burying it inside her dripping vagina.

They both looked in the mirror at Twilight wearing Cadance's pussy like a hat. Cadance pet Twilight's forehead with her hoof.

"Don't you see now that this is where you belong?" Cadance said, stroking Twilight's cheek. "I can't tell you how many times your brother has kneeled right where you are now with his horn inside me just as yours is." Cadance moved her hoof to her pussy and started playing with her clit, rolling her hips slightly, feeling Twilight's horn inside her. "You'll learn as he did that your place, your purpose is to serve me. To please me. He can tell you first hoof how well I take care of mine." Twilight furrowed her eyes. "Your defiance only makes this hotter for me. But rest assured, by tomorrow, you'll be begging for me to let you put your tongue in my pussy!"

Cadance's magic started to play with Twilight's marehood. Twilight pursed her lips. "Now, now... Didn't I say that I'd take care of you? Do this one last thing and I'll give you what you want. I want you to close your eyes and think about Shining Armor while I play with you." Twilight did as she was told and closed her eyes. A tendril of Cadance's magic slipped inside her. "I want you to focus on your lust for him." Her magic morphed and shaped itself into a stallion's dick. "I want you to feel your taboo love for him with all your heart." The ephemeral dick started fucking her. "I want you to imagine your brother's dick inside you right now."

Twilight started panting. Cadance could feel the love energy inside Twilight coalescing up into her horn. "Yes. That's it!" Cadance coached with her hoof moving faster on her own clit. "Let it all out!" Twilight bit her lip in frustration, teetering on the edge of a climax just out of her reach. And then Cadance said the magic words, "Cum for your big brother, Twilie!"

Twilight's entire body shuddered as she orgasmed. Her horn went off inside Cadance as she came, filling her pussy with arcane energy that made her entire body tingle. "Yes! YES!" Cadance cried out as she came too, spurting out around Twilight's horn, drenching her mane as she squirted even more mare cum.

Her magic fizzled out and Twilight slumped down and out of Cadance's dripping pussy. The younger mare looked like she just stumbled inside from a downpour.

Cadance tried to gracefully land on the floor beside her. "Now, do exactly as I say, and I will promise you your brother's seed..."

Negotiating

The next morning, Princess Cadance opened the door to her bedroom chambers at precisely the right time. On the other side, the ever-punctual Twilight Sparkle had just barely come to a stop outside the door. Her mane was still matted down. As instructed, she hadn't bathed. She reeked of Cadance's musk seeping into her fur. It was the princess's way of marking her territory. It had gained some strange looks from the guards along her trot of shame down the hallway from her bed chambers to Cadance's. But she persevered, determined to get her prize.

Cadance wordlessly pulled Twilight inside and closed the door. She twirled her hoof, instructing Twilight to turn around. Twilight did so and Cadance's magic reached inside Twilight's pussy to pull out a lacy pair of her panties that she had stuffed inside the night before. With a curt shove, she pushed Twilight into her closet with a hoof to her lips to keep quiet.

Cadance climbed back into bed and pulled the very wet panties most of the way up her legs before pulling the blankets back over herself.

A minute later, Shining Armor stepped out of the shower right on time for his morning routine. He remained a stallion of military efficiency after being in the Royal Guard. He finished combing his mane and walked out into the master bedroom of the royal chambers. Cadance was lounging in the bed, waiting for him. "What's on your agenda for the day?" she asked.

"The Steward of Gryphonstone is arriving at the train station today," Shining answered. "I'm meeting him there to go to a lunch. Apparently there's a club in the empire that features hippogriff dancers, and he wants to see how they compare to gryphons, and I'm probably buying the entertainment."

"Well, you know the rules, Shining. No going off to those sort of dance clubs without getting your balls drained first."

"Can it wait until after breakfast?" he asked.

"No. Now get on the bed." Cadance threw the blanket off the bed and made a show of pulling her panties off, giving them a twirl on her hoof.

Shining Armor's nostrils flared, smelling her scent heavy in the air. "Yes dear."

Twilight watched from inside the bedroom closet, looking through the thin slats of the door. Shining Armor sat on the edge of the bed facing the closet. Cadance's magic pushed him back to lay on the bed with his legs hanging off the edge. Cadance took the panties soaked with Twilight's arousal and draped them over Shining's face. His hooves pressed them into his face harder as he unknowingly huffed his sister's scent deeply. Twilight could hear her brother groan and she could see his dick start to sprout.

"There we are," Cadance purred. She climbed over him and straddled his midsection, facing the closet, and obscuring his upper half from Twilight's view. Cadance flicked her tail in his face as she shimmied forward slightly. Her magic stroked his dick, getting it to full mast before she held his thick girth flat against her belly with a heavy slap. She looked at the closet and smirked at Twilight through the door, showing off how deep it would go inside her.

She got up onto her knees and lifted herself just high enough to get it under her before sliding back down on it slowly. She never took her eyes off the closet, knowing full well that Twilight was watching. "It's so good the way your dick feels sliding inside me!" Cadance played with her pussy as she went lower. She leaned back so Twilight could have a good view of her pussy stretching around Shining's thick medial ring as it popped inside her. By the time Cadance bottomed out, Twilight could see the bulge his dick was making in her abdomen. She leaned back even further to accentuate the bulge to an uncomfortable degree. But it was worth it to feel Twilight's seething envy radiating off her. Cadance rubbed his dick through her stretched belly with her hoof.

Cadance started riding him slowly, keeping him as deep as she could to show off the bulge he was making. She played with her pussy some more and moaned. "Oh, your big dick makes me cum so easily!" Shining's balls glistened as her wetness dripped out of her and coated his scrotum.

Twilight waited inside the closet impatiently. Cadance hadn't divulged the details of the plan to her. Perhaps she would turn off the lights. Or blindfold him and they would secretly switch places. Or some kind of advanced teleportation or mind spell.

The bulge in her abdomen flared larger. "Cadie, I'm close!" Shining groaned from under the panties. "Are you gonna swallow it again?"

"Not this time," Cadance said with a knowing smirk. A ring of her magic encircled the base of his dick to keep him from going off yet. Another spell enveloped his balls, making them glow and swell larger.

"Cadie, what are you doing!?" he groaned in a mixture of pleasure and discomfort.

"A virality spell," she cooed. "I think we should try for another foal!"

"But I thought we were one and done!" he wheezed.

"I supposed you could just not cum at all," Cadance said, tightening the ring around his dick.

Shining whimpered. "Okayokayokay! Fine! Please just let me cum!"

"Yes! Give it to me! Give it ALL to ME!" The ring of magic on the base of his shaft snapped free and Shining moaned so loudly it bordered on a scream and his magically enhanced balls flexed and squeezed. Twilight could see every detail of her brother's shaft twitching and throbbing, pumping load after huge load up into Cadance, with the weight of her body pressing her cervix directly against Shining's flared tip.

The bulge of his tip in her abdomen vanished as her womb swelled, inflated with a supernatural amount of his cum. Cadance's magic swirled around his balls, refilling them again and again. Shining cried out as she prolonged his orgasm, until she was bloated to capacity, looking like a gravid mare well into her second trimester.

Cadance rubbed her belly with her hooves with a satisfied smile. "All mine!"

Twilight was fuming in the closet. Cadance had done nothing to get Shining's semen to her, and now she had taken his entire load for herself! There was no way she wouldn't get pregnant from that, and Twilight would be forced to watch her carry Shining's foal once again with intense envy.

Cadance slowly eased herself off of his wilting erection and flopped onto the bed beside him while he caught his breath. She leaned over and sucked his dick.

"Cadie!" Shining whined in a high pitch, still over-sensitive from cumming so hard. Cadance mercifully sucked and licked just long enough to get him clean without needing another shower, including her own juices from his now-normal-sized balls.

"Off you go now!" Cadance chimed. "You don't want to be late now, do you?"

Shining groggily rolled off the bed onto his hooves. Cadance quickly combed his mane again with her magic and had him back to looking as good as he did when he had walked in. Shining looked at his rotund wife on the bed and just sighed in abject disbelief. Still, it wasn't even the kinkiest thing she had done with him that week. Maybe she would get pregnant. Maybe not. He could worry about it later.

"Alright. Love you, Honey," he said. Cadance, with her mouth fresh off his cum-covered dick, offered her cheek, which he kissed and then departed. Cadance waited about a minute before opening the closet door. Twilight glared at her.

If looks could kill...

"Why so cross?" Cadance asked. "You wanted me to get Shining's semen for you, and I have." Cadance rubbed her stretched tummy.

"What good is it to me if it's already inside you!" Twilight huffed as she stomped across the room.

"Come now Twilight," Cadance teased. "Do you really think me so short-sighted? Have a taste of my good faith." Cadance's magic pulled Twilight closer and Cadance kissed her, forcing her tongue into her mouth. Twilight resisted at first, but then she tasted it. She tasted her brother's cum in Cadance's mouth. Twilight's mood turned on a dime and in an instant she started aggressively kissing Cadance back.

Cadance was only too happy to oblige the mare of her affection, swapping as much spunk as she could into the younger mare's mouth until there was nothing left but saliva. Twilight's excitement melted away into disappointment. "There's no need to pout, Twilight. There is plenty more where that came from!" Cadance said, motioning to her crotch.

"Yes! Yes, give me more!" Twilight said.

Cadance crossed her legs tightly. "Well, now I don't know if I want to, after the rotten attitude you had. Maybe if you ask nicely."

Twilight grit her teeth briefly but shoved down her anger. "Okay, yes, please give it to me."

"I think an apology is in order, first."

"For WHAT!?"

"For being a bitch," Cadance said as nicely as she could.

Twilight felt like a blood vessel in her neck was going to pop. "Okay. Fine. I'm sorry for being a bitch. Now please let me lick your pussy!"

"You can ask nicer than that."

"Please, pretty please, with sugar on top, let me lick your fucking pussy!"

Cadance smirked. "I told you I'd have you begging for it." She laid back on the bed and spread her legs. Twilight all but dove between them. She shoved her muzzle as deeply into Cadance's snatch as she could, licking aggressively to try and get every last drop of her brother's cum. She was remiss to find so precious little of it leaking out. The rest was securely locked inside Cadance's womb, behind her tight cervix.

"It's supposed to be in my womb!" Twilight complained.

"And it will be if you're a good little filly!" Cadance said, as her magic pushed Twilight onto her back. Cadance crawled across the mattress to straddle Twilight's hips sideways, holding one of her legs up to scissor her, pressing her pussy flush against hers, lining up their vaginas. "Now with just a few Kegels, I can squeeze his whole load down into you!" Twilight's face lit up, understanding now what Cadance had planned.

"Yes! YES!" Twilight squealed.

Cadance took a deep breath and got ready to push. But then she didn't. "You know, this seems rather imprecise," she said. "If we're going to do this, we need to make sure we do it right!"

"This is right! This is fine!" Twilight begged anxiously as she ground her hips up against Cadance's pussy, trying to coax her brother's cum out of her. "Please just give it to me! I can't wait another minute!"

"Tsk, tsk, Twilight!" Cadance chided. "Haven't you ever heard of foreplay?"

"I- I just had my face in your pussy!" she said.

"Now, now, this won't be but a minute! Let's make sure we give you the best odds of success after all." Cadance shifted off of her and aimed her horn between Twilight's legs. "And now for a well-aimed fertility spell..." Cadance shifted forward, sliding her horn inside Twilight's vagina. "And a one and a two and a..."

A warm pulse radiated out of Cadance's horn and flushed through Twilight's abdomen. Her spring estrus had been uncomfortable before, but now it was a conflagration of burning heat in her loins. She had wanted her brother's semen before. She craved it. But now she needed it. She needed the seed of a stallion to douse her flames, any stallion, as soon as possible.

Cadance pulled her horn out and looked at the mare under her, a panting, ragged mess. Her sweat only brought out the scent of Cadance's marecum stained into her lavender fur and mane from the night before.

"F-fuck me!" Twilight panted in both exasperation and as an imperative.

"I have just the thing!" Cadance said. Her magic opened her night stand drawer and lifted out a large, silicone dildo. "Recognize this?" she asked. "He and I made it together using a mold of the real thing."

Twilight indeed recognized it. How could she forget what her brother's dick looked like after it had been seared into her memory earlier that morning. It even had the same pattern of blue mottling. A narrow tube extended from the base, attached to a tube with a plunger.

Cadance showed it to her. "I'll fill this up with his cum and then... well, I think you get the idea." Indeed Twilight did. She nodded excitedly and laid back with her legs spread. Cadance grabbed a harness from the drawer and affixed it to the dildo, strapping it onto herself.

"Wait, what are you-"

"You asked me to fuck you," Cadance said. "Now bend over!"

"Uh," Twilight hesitated, but Cadance flipped her over with magic and mounted her. Twilight let out a squeak as she felt Cadance press the thick tip against her virgin pussy. Twilight was plenty wet as Cadance rubbed the tip across her marehood. She smeared her copious lubrication along the shaft, but was still met with resistance.

"Hmf!" Cadance scoffed. "It's a good thing you never tried to seduce Shining! He'd be disappointed that his big dick would never fit inside your tiny filly hole!"

"It can too fit!" Twilight whined. She pushed herself back against Cadance a bit harder, getting the tip to pop inside. Cadance smirked. Reverse psychology never failed.

"Well, I still think he's way too long to ever be able to get his whole shaft inside you," Cadance teased. "That's quite important to a stallion. You would know that if you ever had one!"

"I can take the whole thing! I know I can! Do it! I'll show you!"

Cadance just smiled and obliged her, making little thrusts with her hips working more of the strap-on deeper inside Twilight. His every veiny texture was perfectly captured in the mold, and on the surface of the dildo. It was firm, but flexible and soft. The same spongey texture of the real thing. "How does your brother's penis feel inside you?" Cadance asked.

"It's wonderful!" Twilight breathed.

"You think you can take more?" Cadance asked. Twilight nodded with enthusiasm. Cadance pressed forward. Twilight could feel the tight entrance of her pussy strain to stretch around the thickest part of his medial ring. But she made no whine or whimper, determined to get it inside her like a big mare. With just a bit more pressure, it slipped inside her. A moment later she felt the warmth of Cadance's hips against hers. "Well how about that," Cadance said with pride and just a bit of surprise. "You took the whole thing!" Cadance grabbed Twilight's hips and pulled her back against her. Twilight felt butterflies in her stomach as the tip lightly kissed her cervix. "You really are a perfect fit for each other!"

"Yes, yes!" Twilight cried. "It fits perfectly! Now pump in his semen!"

"Oh, but I'm not done with you yet!" Cadance said, pulling her hips back and then thrusting forward again. "You haven't even cum yet!" She started rutting Twilight properly, like a stallion. The medial ring rubbing against Twilight's G-spot, along with Cadance's magic on her winking clit, it didn't take long for her to cum. But Cadance just fucked right through her fresh wetness, keeping her peak stretched out into a plateau of pleasure.

"You're lucky, you know," Cadance said over the sounds of Twilight's whorish moans. "The longest I've ever seen Shining go was just over a minute. He would have definitely gone off before now. And if not, if you came like that while he was fucking you, that'd be the end of the ride for sure! But not with me. This will never go soft. And I could fuck you all day, all night, for as long as I want!"

"P- Please!" Twilight begged as she came again and her eyes started to go out of focus. Her horn started to glow. Cadance plucked a ring from her drawer and snugged it over her horn.

"Ah, ah!" Cadance chided. "Naughty filly!" She pulled out just enough to give Twilight's legs clearance to flip her onto her back.

Twilight's world spun and she looked up at the mare towering over her, fucking her just as fast as she was before. Her round belly, full of Shining's cum, jiggled with every thrust. Cadance followed her eyes and she paused for a moment to put her hooves on her abdomen. "You want this, don't you?"

Twilight nodded with pleading eyes.

Cadance grinned. "Maybe I'll keep his cum for myself! After all, he is my husband. It's mine by right! It's MY cum!"

"No!" Twilight's vision blurred with tears and her legs tried to kick her away, but her muscles were too weak from being cum-drunk. She was helpless to stop the other mare from fucking her.

"Beg for it!"

"Please! Please let me have his cum!" Twilight begged.

"It's mine!"

"Please!"

"Beg for my cum!"

"Please give me your cum!"

"You want my cum inside you?"

"Yes!"

"You need it!?" Cadance pulled the plunger tube off the other end of the dildo hose.

"Yes! Please!"

"Say it! Say my name!" She pushed the hose inside herself.

"Please cum inside me Cadance!"

"HA!" Cadance pushed the end of the tube through her cervix. A pulse of her magic flashed and the two of them turned crystal. Cadance looked at the tip of the dildo against Twilight cervix and Cadance flexed her Kegel muscles. Twilight could see the massive load of her brother's cum rush up the tube, through the dildo, and into her womb. The stallion semen splashing inside her was instant relief of her burning heat, but Cadance had much more to give. Her magic joined her muscles helping her to squeeze out the rest. Twilight's breath rushed out of her as her bloated womb pressed against her diaphragm.

Unlike Cadance, Twilight was unaccustomed to having her uterus stretched so large. It was uncomfortable, to say the least. But even so, Twilight could not keep the grin from her face as she looked down at the swirling storm of her brother's cum inside her belly. But all good things come to an end. The rush of magic passed and the crystal affect wore off. Twilight was left looking at her round, lavender belly. She looked up at Cadance, still hovering over her with her hips pressed up against hers, now sweating as much as she was.

"Thank you!" Twilight panted.

Cadance smiled. "Oh, there will be plenty of time for you to properly thank me later."

Epilogue

Eight Months Later

Two mares stifled their giggles in the Canterlot hedge maze. Cadance lifted her head out from under Twilight's dress and she wiped her mouth. "You were right," she said. "The taste does change during pregnancy!"

Twilight finished wiping her own mouth and adjusted her dress. "So does yours."

"That is what Shining said last time," Cadance agreed. "Speaking of, he's probably worried sick looking for me. We should head back to the gala."

The two mares exited the maze and crossed the west castle courtyard to get back to the gala hall.

Shining Armor scanned the crowd of ponies with Flurry Heart in a sling strapped to his side. He spotted Cadance and she quickly ate a mint before he rushed through the crowd to her side. "Cadie! There you are! I was worried sick! Where were you? Where did you go? Is everything okay?"

"I'm fine," Cadance said. "I just stepped out with Twilight to get a breath of fresh air."

"Are you feeling nauseous again?" Shining asked.

"I'm fine, really," Cadance insisted. Through the window, they watched Twilight Sparkle walk back over to her seat beside Princess Celestia, who insisted on keeping the young mare off her hooves as much as possible. She fluffed Twilight's pillows and then added several more. Twilight settled in and got off her hooves. The dress draped over her round belly.

Shining shook his head. "I swear, she's the same amount of pregnant as you, to the day!"

Cadance smiled. "I told you, it was probably at the same summit with all those delegates from all over."

"Do you know who it was?" Shining asked.

Cadance just smirked and looked away.

"Do I at least know him?" he asked. But given how many ponies he had come to know, it didn't narrow the list down by much.

"Oh, I should think that you know him quite well," she said in that same coy tone of hers.

"Hmf! Well still, I want to give him a piece of my mind! Knocking her up like that and just leaving her alone!"

"She made it quite clear that it's her choice to raise the foal herself," Cadance reminded him. "And besides..."

A waiter walked over to Twilight with a tray of wine glasses. Twilight politely waved him away. Celestia slapped the tray out of his hooves, sending the wine glasses scattering on the floor. They couldn't hear what Celestia was saying through the window, but her expression was visibly angry. Luna stood up and pointed at Twilight's belly and yelled at the waiter. The rest of Twilight's friends emerged from the crowd and rushed over to the commotion. Starlight surrounded Twilight with a shield. Rarity scooped up the rest of the broken glass with her magic away from Twilight and safely discarded it. Applejack grabbed Rainbow Dash by her tail as the pegasus grabbed a broken glass and threatened the poor waiter. Pinkie Pie didn't appear to know what was going on but just looked happy to be yelling along with everypony else. Also, Fluttershy was there.

Cadance smiled. "She's anything but alone."