Royal Estrus

by little big pony

Rating: mature
Tags: Anon, My Little Pony: Friendship is Magic, Human, Princess Luna, Porn, Random, Princess Celestia, Sex
Length: 6579

Luna goes to see Celestia and her husband during estrus. This is not a good idea.

Estrus is upon Equestria. It's a time of passion, of lust, and of discomfort and frustration. Luna has been around long enough to have done and see it all during this long, long month. Unfortunately for her, Celestia is going to try her hardest to show her something new.

Warning: Human X Horse Action. You've been warned.

Artist is hosikawa

Published 2021-03-01 23:10:03 UTC
Last updated 2021-03-01 23:10:03 UTC

Honestly, What Was She Expecting?

Author's Note

Contains: Mares in heat, incest, dirty older sisters, dirty talking, threat of impregnation

Honestly, What Was She Expecting?

“Good afternoon, your highness.”

“Hello, Princess.”

“Your majesty!”

Luna made her way through the halls of her castle, navigating her way through crowds of nobles and commoners. She greeted each that she walked by, taking their bows and words of reverence as one would expect of an alicorn, except when she would happen upon a filly or colt. No matter what sort of mood she was in, her heart would melt seeing a foal awkwardly bow and try to greet her. Most couldn’t do even that, just staring up at her with wide eyes and opened mouth. For these little ones she could stop and properly greet them, much to their parents’ delight. Today however, even with the adorable foals she was brief.

Estrus season was once again upon Equestria, and Canterlot was getting ready for all it entailed. Today would be the last day that the castle would be open for at least a month, and there was much work to do. It was still early in the season, but even so Luna could smell that familiar, strong scent of mares in heat, as well as see flagging tails and flustered ponies. Soon, many would return to their homes, to sate or occupy themselves as they were able.

It had been her who had overseen the Day Court, as her sister was very much indisposed. All the things estrus did to normal mare did to her a thousandfold. Celestia was the sun, but she was also of flesh and blood; a goddess, but still a mare. When her sun was at its zenith, her usually controlled, measured self crumbled like wet tissue paper.

Even before her imprisonment her sister had been infamous during heat season, but her escapades were now the stuff of legend. Luna never got a good answer as to what her sister had done while she was gone, even from her sister, but apparently a rather spooky foals’ rhyme had been made because of it.

Thankfully, there were systems in place to prevent anything scandalous from happening nowadays. Wards, spells, three foot thick steel doors that could withstand a battering ram. If all else failed, there was also her husband, who would do his very best to keep her entertained.

Even so, the Princess of the Night was a tad uneased. Estrus or not, somepony still needed to oversee the guards, sign paperwork, keep the castle’s maids from jumping any poor stallion that would still be in the castle once it was locked down, and in general just keep the castle running as normally. It was a lot of work, if Luna were being honest with herself, especially since she was beginning to feel the heat’s effects herself, but she would persevere.

The guards were shepherding anypony not essential to the castle’s maintenance out, even now. They would need to be spoken with in a few hours, and reminded of the proper procedures while they were on duty for the next thirty days. She had made a point to have the whole staff scheduled for an inspection, to make sure that her little ponies were ready for what was coming at noon.

This meant she had a few hours to herself, which meant that she could see how her sister was doing. She hadn’t heard from or seen Celestia for the last two days, and she was getting a tad worried. So, she would check on her sister, see if she was still alive, perhaps get her something to eat, and then she could begin to work through a very long to-do list. It would be quick, simple, and no funny business whatsoever would happen. Definitely.

Luna allowed herself a little sigh as she made her way to her sister’s room. This wasn’t the room in the royal wing where she usually stayed, but a space Celestia had designed especially for her heat. It was in the lower levels of the castle. There were three doors of increasing security that one needed to get past to even approach it. There were also no windows, runes, glyphs, and all sorts of spells making sure none could easily enter or escape.

Very few ponies were allowed anywhere near the room, for fear of their safety, and absolutely nopony was to let Celestia wander. Luna did not like keeping her sister down here, and wouldn’t even do so if not for her sister’s own urging.

The guards at the first door seemed ill at ease as they allowed her through. Those at the second door jumped when she approached them. The third begged her not to enter, insisting that they had heard and seen things. What those things were they refused to elaborate, but it had taken a royal order for them to open their door.

Like many of her little ponies, the guards were no doubt overreacting, so Luna paid them little mind. She even went so far as to shake her head and grumble about how ponykind had been made of sterner stuff back in her day. That was until the third door had been closed behind her, and found herself in Celestia’s “prison”.

The temperature difference was the first thing that she noticed. It must have been twenty degrees warmer down here. The next was the absence of smell. The scent of heated mares had filled the entire castle, all but this place, which was worrying. That meant her sister had either escaped, which was very bad, or she was using her magic to conceal it.

Luna stopped, ears perking up. Everything was quiet. Far too quiet.

A giggle suddenly came from behind her, making her nearly jump out of her fur.

“Oh Luuuuuuuuuna~”

Whipping around, she saw her sister standing not five feet away from her. The mare was without her royal regalia, her mane slightly messy. She had a smile on her face that was just a tad too wide, and there was an unsettling look in her eyes as she took a step toward her.

“Are you alright, dear?” Celestia asked, head cocked to the side. “You looked like you’ve seen a ghost.”

“I--” Luna cleared her throat, standing up straight. “It’s nothing. You simply surprised me is all, sister.”

“Oh, well I’m sorry, Luna. I was just helping myself to a glass of water,” Celestia said, taking another step toward her, then another. “I didn’t mean to frighten you.”

She took one more step and then the smell hit Luna like a ton of bricks. It was the scent of sweat and sex, the smell of a heat that could, and had, driven a mortal to untold acts of debauchery.

When Celestia took another step, the facade completely fell away. Her mane wasn’t just a tad messy, it looked as if she hadn’t brushed it in a month. Her flushed skin could be easily seen through her coat. Her tail was flagging, and it looked as if she couldn’t keep her wings closed. Celestia’s smile was crazed, the fur on her face matted with spit and… other liquids, but her eyes were even more terrifying. In them, all of the desires of an immortal goddess could be seen as clear as day.

Not only had her sister been using a spell to contain her scent, she had been using a glamor as well. Luna didn’t have much time to think on that, as Celestia continued to make her way toward her.

“It’s lovely seeing you, sister,” the bigger alicorn continued. “I missed our little conversations during breakfast.” She licked her lips. “I particularly missed seeing that flank of yours whenever you walked away. Those big moons rubbing against each other with each step you took. Hmm~”

Luna let out a yelp as she bumped against something cold and hard. Whipping her head around, she saw that she had been backed up against the wall. Looking back, she saw that Celestia was not an inch from her face, eyes burning with desire.

“Sister. Where is your husband?” Luna asked, trying to keep the quiver out of her voice.

“He’s in the bedroom, taking a breather,” Celestia replied, licking the tip of her nose, pulling away just as Luna’s wing unfurled to give her a smack. “We’re trying for a foal you know.”

“Yes, you mentioned--”

“He’s been rutting me again and again like I’m nothing more than his filthy little broodmare,” Celestia said with a sigh, a bead of arousal falling from between her legs to hit the stone floor below her. “Usually, we like some foreplay in the bedroom, but the second he carried me down here I’ve been on my back or face in a pillow and rump in the air. It’s wonderful.”

Luna coughed into a hoof. Her sister’s scent was starting to get to her. With each breath she took, she could feel her body starting to heat up. Memories of nights filled with heated, hushed giggles, lingering kisses, and desperate, animalistic love making came to mind. She tried to beat them down with a flap of her wings.

She twitched as Celestia gave her neck a kiss, her eyes widening. “S-Sister!”

Her big sister just hummed, sitting on her rump. Wrapping her hooves around Luna’s neck, she pulled her forward, pressing her face against her furry chest. Her hum turned into a chuckle as she rubbed her chest back and forth, marking Luna with her scent.

“Poor little sister. She doesn’t have a nice, thick cock to make her squeal and quell that burning itch under her tail,” she said, tsking. “Nopony to fill you to bursting with their fertile seed. Nopony to make that belly swell, or fill those cute little teats of yours with milk.”

She nuzzled the top of Luna’s head, nostrils flaring.

“Is that the real reason why you came down here, sister? You want big sis and her big, strong husband to help you think straight?”

She kissed one of Luna’s ears. Her long tongue slipped out of her mouth, dragging up the entire length of her horn. Luna, who had been trying to wiggle out of her sister’s grasp, immediately froze.

“You smell so good, Luna,” Celestia murmured. “It makes me want to eat you up; hear those cute little sounds you make when my tongue--”

Luna reared back, escaping her sister’s chest floof, her face as red as a tomato. “Sister, in harmony’s name I beseech you to not finish that sentence,” she said.

She trotted around her sister, biting her lip when she felt Celestia nip her rump with a giggle. Her marehood clenched, and she could feel a familiar wetness running down her inner thigh. She ignored it as best as she could--that and her quivering back legs--looking over her shoulder at Celestia.

“I simply wished to see if you and your husband were alive and well. Since it seems as though you’re in good spirits, I shall make my leave and let you get back to your merriment--”

“Breeding,” Celestia corrected.

“Merriment,” Luna stressed. “I have the castle to oversee for the next month, with all of its duties. If you have any needs, please let the guards at the door know.”

“What if what I want is right in front of me?” Celestia asked with a smile, sauntering over toward her. “On your back, spread eagle. Perhaps with my big human’s cock in one of your holes?”

“You are incorrigible”

“Oh, don’t be grumpy with me, Luna,” Celestia said, draping a wing over her. “I’m just worried about you is all.”

“Oh, I’m sure you are, sister,” Luna replied, rolling her eyes.

“I absolutely am. There you are, about to take on all of the castle’s duties, during estrus no less. That’s a lot of responsibility for any pony, much less one that isn’t of the right mind.”

“I’m of the right mind!”

“For now you might be, but what about tomorrow? Or the next day? Or the day after that? Your heat might be manageable right now, but it’ll hit you hard sometime soon.”

“I shall deal with it.”

“But you don’t need to. Big sis and her husband are right here to help you blow off some steam. Your heat won’t be nearly as bad with a roll in the hay, or a foal in that belly of yours.”

Luna gave her sister an irritated look. “I have a very full schedule today.”

“We’ll be quick,” Celestia promised.

“You always say that.”

“I mean it this time. Promise.”

Celestia batted her eyelashes at he sister, reaching back to give her flank a squeeze. Luna’s eyes narrowed, and she used a wing to push her away. She was about to make her way toward the door, but stopped midstep.

Doing anything other than leaving would be a terrible idea, she knew this. Celestia always had the most deranged kinks, and her significant other would only encourage her. If she stayed, her sister and that horndog husband of hers would do things to her that would keep her from looking anypony in the eye for at least a few months. Even now, as she stood there, Celestia was groping and nuzzling her butt like some teenage colt.

Luna took a deep breath--not a good idea, as her sister’s scent was still thick in the air--shoulders slumping. She turned toward her sister, her face stern.

“If I indulge you for a few minutes you’ll both be on your best behavior, yes?” she asked.

Celestia, who had been about to run her tongue up Luna’s cutiemark, paused. “Hmm? Oh, of course, of course.”

“No trying any funny business with the guards? No breaking out to run amok?”

“Absolutely not.”

“You’ll also refrain from sending your old student any overly lewd letters?”

A minute passed in complete silence, both alicorns just looking at each other.

“...What if we sent letters and that exchanging of letters became increasingly saucy?”

“I’m leaving,” Luna said, taking a step toward the door.

“Wait, wait, wait,” Celestia said, rushing to block her.

She placed a hoof to her chest, taking a deep breath. “Luna, my dear sister. I, Celestia Mous, First of Her Name, promise no funny business whatsoever if you allow my husband and I to plunder the treasure underneath your starry tail. No attempting to escape, no trying to seduce the guards, none of it. You have my word.”

“And no letters?”

“None whatsoever.”

Luna clicked her tongue. “I would hear you make a Pinkie Promise, sister.”

“Do you really not trust your sister?” Celestia asked, frowning.

“Not even a little,” Luna immediately replied with a shake of her head. “Now say the words, or you get nothing.”

Like a little foal, Celestia huffed and puffed, once again sitting on her rump. “Cross my heart, hope to fly, stick a cupcake in my eye,” she said, completing the necessary gestures.

The smallest of smiles came to the younger alicorn’s face. “Very good,” she said, patting her sister’s head. “Now show me the bed chambers. I would like to be quick about--hmp!”

In the blink of an eye, Celestia closed what little distance was between the two, mouth crashing against hers. She had always been an aggressive kisser, but now she seemed nearly crazed, her tongue attacking Luna’s.

She smacked away the hoof that was trying to reach for the back of her head. Grabbing her sister’s face, she forced her back, breaking their kiss. She held Celestia at foreleg’s length for several seconds, before leaning in to kiss her. Celestia tried to jam her tongue into her mouth, but Luna just pulled back, waited, and kissed her again. This continued until Celestia had calmed down. It was only then did Luna let her prod her lips with her tongue. Her hunger was still there, but it was restrained. Luna was the one in control; just how she liked it.

She could feel her sister’s warmth, see the need in her eyes. It was hard to keep herself under control. As much as she wanted to throw her sister onto the floor and take her right there, she had a schedule to keep. Besides, a bed would be much more comfortable for everypony involved.

Luna broke the kiss, breathing hard. Celestia, with a whine, tried to lean forward, to continue the kiss, but stopped herself. She gave the younger alicorn such a pitiful look that it made her snort out loud.

“Come. Let’s go greet that husband of yours, you fat flanked harlot,” she said.

Celestia was on her hooves in a flash. Giving Luna a nuzzle, she trotted down the hall. To get her back for earlier, Luna gave her rump a hard smack as she passed, which the older mare seemed to enjoy. She followed her sister to the very end of the hall, to an open chamber.

This chamber was nicely furnished, with tables, chairs, a couch, and a massive bed. Everything looked rather out of date, but very sturdily made. Old electric lamp lights hung on the walls, casting a yellowish, golden glow on everything.

There were bottles everywhere. Some were wine bottles, other plastic bottles for water and juice and such, but Luna also saw ornate, multi-colored bottles that zebra shamans were known for. There must have been dozens of these, scattered about. There was something sitting on the edge of the bed, one of these bottles in it’s hand. It was a rare creature, and possibly one of the only things in existence that could keep up with her sister. Her husband, Anonymous the human. He was naked, in obvious good spirits, but tired.

“Sweetie, look who I brought!” Celestia said, trotting over to him.

The human looked up. Seeing Luna, he smiled.

“Highness,” he said, bowing his head.

Luna bowed her head in turn. “Brother in-law.”

Celestia nuzzled her husband, giving him a kiss on the cheek. Anon, wrapped an arm around her neck, nibbling her ear.

“Luna’s here to get knocked up with your foal, just like me, sweetie,” she said.

Anon, eyebrow raised, looked back up at Luna.

“Your wife ambushed me in the halls whilst I was coming to check up on you both,” she explained. “She wouldn’t let me leave until I sated my lusts on the both of you, so here I am.”

“Ah. Gotcha,” he said, uncapping his shaman brew and bringing it to his lips. He started to swallow, grimacing as he did so. “We’re gonna need to be careful though. Cel’s been pumping me with these potions for the last two days. They’re the same kind that Cadence was giving Shining Armor before they had Flurry. If we don’t watch I might actually put a foal in your belly.”

A shiver ran down Celestia’s spine. “You know, I wouldn’t mind that. Both of us carrying foals, both of us little broodmares to an apex predator.”

“Well, I would,” Luna said. “No offense, Anonymous, but the kingdom would be in an uproar, and the headache that it would bring is not something I’d wish to deal with.”

Anon stood up. He cock was half-hard. Luna had seen her brother-in-law’s stallionhood more than a few times--this hadn’t been the first time her sister had dragged her into the couples bedroom, and it wouldn’t be the last--but there seemed something different about it. It was thicker, and had an odd tint to it.

Head cocking to the side, Luna sniffed the air. Her sister’s scent was still there, but there was something else that was threatening to drown it out. A masculine, distinctively alien scent. She knew from experience that it was Anon’s scent, but it was far stronger than it had ever been.

“What in Harmony’s name has me sister been making you drink, Anon?”

“No idea,” the human replied with a shrug as Celestia, giggling, planted a kiss on his cock. “If the missus tells me to do something I usually do it, no questions asked.”

“I feel like that perhaps isn’t the smartest way to go about things.”

“Well, clearly you haven’t been married in a very long time.”

Celestia was lost in her own little world, nuzzling and kissing her husband’s cock while he and the younger alicorn conversed. Luna watched as she brought him to full mast with little effort, resting his penis on her muzzle while looked up at him with half-lidded eyes.

“You smell so good love,” she whispered, nuzzling his sack. Her tongue snaked out of her mouth to lick him, and she giggled again. “You taste even better. I could just eat you up~”

Anon’s cock throbbed, bouncing off her muzzle to smack her cheek. Celestia’s horn glowed, the alicorn grabbing him with her magic. Nuzzling his cockhead, she opened her mouth wide, before stopping.

“Where are my manners? Luna, would you like to join me?”

Luna looked at her sister, then at Anon. Despite herself, the heat under her tail was becoming noticeable. She licked her lips, giving her wings a small flap to try to cool herself off.

“Actually… I could partake.”

“Excellent,” Celestia said, clapping her hooves. “Sweetie, be a dear and sit down. You’ve been doing so much of the work these last few days. Relax a little while and let us take care of you.”

Anon got down one knee, giving his wife a kiss, which she happily returned. As Luna made her way over, tail flagging, he looked at her. There was a questioning look in his eyes. It was the same look he always had whenever the alicorn found her way into the couple’s bedroom.

Celestia would always pounce on her as if she were a piece of meat without a single thought. It had always been like that. Anon, however, was different. No matter her position, or what state she was in, or what she wore, or what Celestia was doing to her; he wouldn’t so much as lift a finger toward her unless he was sure that she wanted it. It was incredibly sweet, and a rare trait for a male to have.

She gave him a smile and a nod, kissing his cheek. The human visibly relaxed, grabbing her by the back of the head and pulling her into a kiss. He was much more manageable than her sister, calmer as well. His tongue was much smaller than hers, weaker as well. If she wished, she could overpower him and just explore the inside of his mouth, trace those exotic teeth of his, or hold the kiss until he was struggling for breath.

Luna hummed, pressing into him. Anon grunted in surprise, falling onto his rump with his back pressed up against the bed’s frame. He tried to move away from it, but the alicorn bore down on him. She started peppering his face with kisses and nuzzles. She rubbed her nose against his, nibbled on his earlobes, tracing the muscles of his chest with a wingtip. The two pushed and giggled, kissed, and bit, until Luna found herself sitting in his lap, his cock pressed against her inner thigh. He had his arms wrapped around her, his face pressed against her neck. Luna had both hooves and wings wrapped around him, holding him tightly against her.

She could feel his chest rising and falling with each breath he took, feel his heartbeat pulsing from his chest. The alicorn knickered, licking the side of his face.

“As much as I would like to stay here, brother in-law, we must make haste,” she said, her voice barely above a whisper as she gave him another affectionate nuzzle. “Please. Lie on the bed. I would like a taste of you.”

It took some coaxing, from both Luna and Celestia--who found it all so adorable that her estrus went by the wayside for a few moments--but they were able to get Anon onto the bed. Luna placed a few pillows against his back to make him more comfortable, while Celestia made sure that his legs were spread wide open, giving both mares complete access to him.

His tip was already freely leaking precum. Each time his cock pulsed another spurt of the clear liquid would dribble out. His mushroom head was swollen and nearly a purple color.

“Enjoy yourself, sister,” Celestia said, kissing her before hopping into the bed next to her husband. She pressed herself against him, wrapping a wing around his back. “Put that cute little mouth of yours to work, you adorable little slut.”

Her horn glowed, encasing his cock with her magic. She wagged it back and forth as Luna drew closer. When she was close enough, Celestia smacked her nose and cheeks, rubbing the human’s precum into her fur. Luna let her have her fun, even tilting her head to give her more to smack, but eventually she broke her sister’s magical hold with a flash of her horn. Anon’s cock fell forward, bouncing off her horn and landing onto her face. Luna smiled, nuzzling his balls as she looked up at him.

Her tongue slipped out of her mouth to lap at his flesh. She could taste his sweat, his cum, and her sister. This was a combination that she had always been fond of, but with her heat it was nothing less than divine. She hummed, taking one of his balls into her mouth and gently sucking. His cock twitched, and Luna felt a spurt of pre land amongst her starry mane. She groaned, switching to kissing and sucking the base of his cock.

Anon sighed, kissing his wife’s cheek. Celestia giggled, murmuring something in his ear, which made him smile. He reached down, scratching Luna’s ear as she worked her way up his shaft, licking him clean, her tongue tracing every vein that it touched. As she reached his crown she stopped. She grabbed his shaft, stroking him as she opened her mouth up with an “ah”, showing him her long, thick wet muscle. Anon whimpered, bucking his hips.

“Be good, honey,” Celestia said, nuzzling his chest, not taking her eyes off her sister.

Luna gave her a wink, tilting her head down and wrapping her lips around his cockhead. She swirled her tongue around his tip, feeling him pulse in her mouth. She couldn’t help but giggle, taking an inch or so into her mouth before pulling back, then doing it again, letting her spit drool from around her mouth and down onto his shaft. Then, with another wink, she took him down to the root in one smooth, practiced movement.

The human groaned, and if it weren’t for Celestia, he would have thrust his hips so hard that it would have knocked Luna on her rump. Luna moved her head from side to side, eyes closing as she savored the sensation of having her mouth completely filled. Her tongue slipped out to lap at his balls. She held the position as long as she could, swallowing and sucking and licking, until it felt like her lungs were about to explode. Only then did she slowly pull back, giving his tip a kiss before letting him go with a wet pop.

Anon was breathing hard, his eyes half-lidded. Celestia was in a similar state. The human had a hand between her legs, two fingers pumping in and out of her as Celestia rested her head on his shoulder and whimpered.

“Anon?” she said.

“Yes dear?” the human replied.

Luna gave his cock one parting lick before she turned toward her sister. She kissed her big sister’s heaving belly, then her inner thigh. Nuzzling the human’s hand, she wiggled her tongue between his fingers. Celestia gasped, placing a hoof on top of her head. Luna let out a groan as her sister’s taste hit her tongue. She was sweet, tangy; addictive. Her groan turned into a growl as she nuzzled herself forward, determined to get more than a mere taste.

“Ffffffffffuck!” the older alicorn hissed, biting her lower lip.

Both Luna and Anon worked in tandem, though Luna had to give the credit largely to the big stallion. His hands were such dexterous, wondrous things. All she would need to do was lick the space between fingers and he’d be able move out of the way enough to lap at her sister’s cunny. Even when he began to pick up the pace, pumping in and out of her faster and faster, he was still able to move with Luna in mind.

Celestia’s groans became more and more breathless as the two did their work. She couldn’t sit still, and Anon needed to use his other hand to somewhat awkwardly keep her from folding over. Luna was trying to jam her tongue in between the fingers that were inside of her sister, when Anon’s pinkie booped her nose. Scrunching, she looked up at him. He nodded his head down between Celestia’s legs, and with his thumb pointed toward her clit. Luna’s eyes widened in realization.

Anon was kind enough to slow his fingering, moving his arm out of the way as she tilted her head up. Celestia jumped as she ran her tongue up her marehood, lingering at her clit. The hoof on Luna’s head tried to force her forward, but she resisted, giving her sister’s belly a nuzzle before wrapping her lips around her clit and gently sucking.

Celestia closed her eyes, backlegs clamping down on her head.. “Oh… f-fuck,” she hissed. “fuck, fuck, fuckfuckfuckfuckfuck”

Her body went ramrod stiff, eyes shut tight. Anon pulled his fingers out of her, allowing Luna to lick to her heart’s content as she came. She didn’t stop until Celestia’s grip on her head had gone completely slack, and even then she spent another minute or so licking her clean. When she did pull her head from her sister’s shaking legs, she saw Celestia half-awake, eyes still closed, completely held upright by her husband. Anon was licking his fingers clean, a mischievous glint in his eye.

“I hate to break it to you, blue, but that wasn’t a good idea on your part,” he said.

Luna was about to ask just what he meant by that when Celestia’s eyes snapped open. Her pupils were dilated, and an expression of crazed lust on her face. Luna’s eyes widened.

“You’ve been dealing with her when she’s in heat a lot longer than me,” Anon said as Celestia let out a feral neigh. “Licking her like that is just gonna work her up more.”

“I was just--” Luna began.

Before she could finish, Celestia let out a roar. Her horn crackled to life. The room went from dim to so bright that Luna had to close her eyes. There was a snap, something picked her up, flipped her around, and dropped her onto the bed. She stared up at the ceiling, blinking away the dots in her vision, before there was a loud pop. Her sister appeared, straddling her, her eyes wild.

“You slut,” she hissed, pinning Luna to the bed with her front legs. “Slut. Licking your big sis like that, making her cum like that!”

Luna groaned as Celestia pressed her marehood against hers. Her back leg twitched, her belly filling with butterflies as the bigger alicorn began grinding. She lifted one of Luna’s legs up, placing it against her chest. Both mares were so wet that there was no friction, only bliss. Each time Celestia moved sent a jolt of electricity up Luna’s spine. She tried to move her hips, only for her sister to place a hoof against her lower belly.

“I wish I had a nice, big cock you could suck and bounce on,” she said. “Call me mommy, you whore. Call me mommy while I fuck you!”

“S-Sis--”

It was too much. The crazed look in her sister’s eyes, the feeling of their teats and marehoods rubbing and grinding together. Her sister’s warmth, the smell of sex that was so thick in the air that she could taste it. With a whimper, Luna’s back arched as a wave of pleasure exploded upward. Her vision went hazy, and her back legs began to twitch . Her sister, snarling, continued to ride her, drawing out her pleasure so much that it became hard to breathe.

She twitched as, even through the sea of warm bliss, she felt a tongue drag across her leg. A hand touched her cutiemark, giving her rump a squeeze. Celestia suddenly let out a groan, going ramrod stiff. She sat back onto her haunches, eyes snapping shut as arms wrapped around her. Anon’s head appeared over her shoulder, the human kissing her neck as he pulled her back toward him. Celestia actually resisted him, still wishing to grind against her sister, but he was just a bit too strong. He placed a hand on her rump lifting her into the air.

Celestia let out a whine as he bit down on her neck. Anon chuckled, whispering something into her ear. All her struggling stopped, and her eyes widened. He lowered her back down on top of her sister. Luna readied herself for more grinding, but to her surprise, Celestia wrapped her hooves around her neck.

“I almost forgot. I do have nice, big cock for you,” she murmured, nuzzling Luna’s face.

Hands spread Luna’s legs. Something touched her marehood. It started to rub up and down her slit with just enough force to spread her lips but not penetrate her.

“Anon’s gonna fuck you until you can’t see,” Celestia said, kissing her on the nose, a smile on her face. “Make you a sweet little race traitor just like his dear old wife.”

Anon stopped his teasing, pressing the tip of his cock against her lips. If she didn’t have her sister on top of her, Luna would have lifted her hips as she felt him slowly, gently push himself into her. She clenched around his cock, shutting her eyes as Celestia peppered her face with kisses. She heard the older alicorn’s horn come to life, and let out a yelp as she felt her clit being toyed with.

“Just look at big sis while you get fucked,” Celestia cooed as, with a jerky thrust, the human hilted. “I want to look into your eyes while he puts a foal in you.”

Anon pulled back, fingers digging into Luna’s flesh. He stopped just short of fully pulling out, taking a deep breath as he forced inch after inch inside of her. Slowly, he began to build up speed. Celestia toyed with her love button all the while, nuzzling and kissing Luna’s face as she was rocked back and forth by her husband.

“Hmm~ Can you imagine, Luna? The two of us going to court with matching bellies? I can’t wait until your teats get so big and filled with milk. Oh, it’ll be wonderful; two little sluts carrying a half-breed foal.”

Luna groaned, squirming under her sister. She could already feel Anon throbbing inside of her. He was going to cum soon. With all of those fertility potions that he had been taking these last few days Harmony knew what would happen. Her heart leapt to her throat at the thought.

She wanted to feel him unload inside of her. She wanted him to drown out this cursed heat. Her body seemed to wish much of the same, as her inner muscles began to milk his cock, making him grunt. He started thrusting faster and harder, his mushroom head ballooning as Celestia let out a chuckle.

Luna swallowed. “An--”

Her breath left her as the human’s tip slid against a very sensitive spot inside of her. Her hips jerked, nearly knocking her sister off of her as her eyes crossed. Her back legs crossed, wrapping around the human’s hips, forcing him even deeper inside of her. Her heart pounded in her chest as rationality and animalistic desire battled inside of her.

“An… Anon… ANON!” she yelled, mustering all the willpower that she had left. “I--ah~ Don’t! Not inside!”

Anon’s hands left her. Quick as a whip, he pulled out of her, grabbing his wife. Celestia didn’t have any time to react as she was lifted off her sister, dropped right next to Luna. A moment later, Anon was in the bed, fucking her like a wild animal. Celestia could only groan and whinny, her back arching as the two began a tangle of arms and hooves.

“Fuck! Breed me! Knock me up with your foals!”

As the two went at it, Luna just laid on the bed, eyes shut, breathing hard. Her marehood was still clenching around a cock that was no longer there. She pushed some of her mane out of her face, letting out a sigh. Relief, tinted with just a bit of disappointment, filled her. Thankfully, it looked like she wasn’t going to be a mother quite yet.

Everything already ached, and more than anything she wanted to go to bed. Even with her sister screaming her head off, she could feel herself slipping into her realm of dreams. Just as she embraced that familiar, comforting darkness however, a thought came to mind.

The castle staff needed to be inspected and debriefed. The entire skeleton crew, more than a hundred ponies, would be waiting in the throne room at noon. There were no clocks in this room, so she had no idea what time it was.

“Oh fiddlesticks.”

Luna sat up, eyes snapping open. She frantically looked around, scrambling to her hooves. Giving her brother in-law a kiss on the cheek, with a mental note to properly thank him for his restraint later, she leapt off the bed, running full sprint to the door locking them all in.

“Guard, open up this instant!” she yelled, pounding on it.

“You’re highness, I can’t. I have--”

“OPEN THIS GOSH DARN DOOR UP!”

There was a yelp, and the door was opened. Luna rushed through it without so much as a thank you. It was much the same for the other two security doors. Later, Luna would need to apologise for the rudeness, but now she was making good time. Running past a clock, she had seen that she still had some time left. If she hurried, she just might make the inspection on time. She galloped as fast as she could on her shaky legs. Thankfully the halls were by now empty, meaning that she found herself at the doors of the throne room one minute till noon.

She threw open the doors. Sure enough, the skeleton crew already were waiting for her, huddled in various groups. Everypony turned as she opened the door. Luna took a deep breath to steady herself, giving them all her best motherly smile.

“Hello, my little ponies. My apologies for keeping you all waiting--”

A mare gasped. Murmurs erupted from the crowd, eyes widening and ears perking up. Somepony even pointed at her. Luna blink, pausing mid-speech to look herself over.

Her mane was a mess. The fur on her face was still soaked with pre and spit. A quick sniff of the air told her that she reeked of her sister’s and Anon’s scent. Her wings were in terrible shape as well, with feathers sticking up every which way.

Luna looked back at her rump, winced, then looked down at the ground. Defeated.

“Horse apples…”