“Will you stop fidgeting?”

Luna grunted in response, shifting in her poofy dress. “Simple words, for one that is merely presiding over the ceremony, while I await for my bride.” She shot Cadance a dirty look, the pink princess standing above her at the altar. “I’m certain you were a mess at your own wedding…”

“No, I was completely calm; well, except for the whole changeling invasion of course. You would know, if you hadn’t slept through the whole event. Oh, don’t look at me like that, I heard the changelings even got you in a cocoon, and you still kept sleeping like a log; like that story about a mare who only wakes up when kissed by true love.” Cadance smiled that smug and most infuriating smile of hers, one that Luna was growing to know all too well. “Tell me, do you wake up when Celestia kisses you in the morning?” She chuckled, then added in a whisper, “I know you don’t wake up when she pounds you like a piñata at least…”

Luna growled in warning, an unwelcome blush blossoming on her cheeks. “Cadance,” she whispered back, baring her teeth, “will you try to pretend to have but a shred of decency?” She gave a pointed glance to the other side of the altar, where a smiling Twilight stood with her head tilted, looking at them with a curious expression, her ears perked as she tried to hear their whispers. Luna gave Celestia’s maid of honor a fake smile, and Twilight responded with a radiant and innocent grin, bless her heart.

Cadance’s lips quivered, probably dying to poke some more fun at the anxious bride-to-be, but she held her tongue. She knew full well not to push her luck with Luna, the faint bite marks on her nape a good reminder of what happened when she angered the alicorn. Actually, Luna decided that the first thing she would do when returning from the honeymoon would be to visit the Crystal Empire and punish the impudent mare once again; not that Cadance would mind.

Luna was sure Cadance always angered her on purpose at this point; the pink princess had even created a room in her crystal castle just for Luna’s visits; the dungeon she called it, filled with whips and bridles and a truly frightening array of adult toys… that mare was a piece of work.

“At least try to smile a little,” Cadance teased, apparently unable to stop herself, “we had to wait so many months, you can’t break down now.”

“Actually, as far as royal weddings go,” Twilight piped up, “yours has set a record for fastest planning and execution. Even if you count the few days of, ah, chaos after the announcement; I had never seen Discord that happy before.”

“Do not speak of that wretched worm,” Luna spat, eyeing the crowd of ponies watching them, “it’s already bad enough that Celestia invited him.” She growled silently as Discord waved from the back of the room, as if he knew they were talking about him; and he probably did. “That knave did nothing to help while the kingdom fell into anarchy, he only fanned the great panic.”

“Yes, but only so ponies could get it out of their system faster.” Twilight beamed. “You can’t argue with results, it worked!”

Yes, no matter how infuriating the draconequus was, Luna had to admit his shenanigans had certainly helped. It was mindboggling how fast ponies went from panicked screaming to total acceptance, pitchforks replaced by flowers and well wishes from one day to the next; even those that had distrusted the mysterious dark alicorn had completely changed their minds. Truth be told Luna was a tad miffed that it took her having an incestuous relationship with her sister for ponies to start trusting her.

Ponies loved Celestia that damn much.

“Oh, it’s starting, here she comes!” Twilight squealed happily, the fanfare starting to play a melodic rendition of ‘Here comes the bride’. The young alicorn was grinning from ear to ear, her wings buzzing like a hummingbird. “Shiny, do you have the rings? Is everything ready?”

“Of course,” Shining Armor said happily, holding a velvety box in his magic, “oooh, I can’t wait! This is going to be so great!”

Luna’s eyes twitched, trying very hard not to glare at the unicorn standing at her side; she knew full well Celestia had made him her ring bearer and stallion of honor just to get under her skin. Not that she hated the stallion, she even let him join in the ‘dungeon’ whenever she visited; to be on the receiving end, of course. She had quickly calmed down after her initial freakout the day Celestia had confessed her deeds, but still: it was hard not to feel spikes of jealous possessiveness when she knew her sister was carrying a few unicorn foals; the magical scans had been formal. Not to mention…

As tenderly as possible, Luna ran a hoof over her round belly, her airy white nuptial-dress expertly tailored to showcase her pregnancy. As Rarity had said, there was nothing more beautiful than motherhood, and the seamstress had created dresses that drew attention to their bellies, rather than cover them up. Luna had felt it was much too revealing at first, almost too… lewd, but she couldn’t argue with the result. She glanced at Cadance’s own vanilla colored dress, the pink princess’ baby bump proudly displayed for all to see.

Luna couldn’t help but compare their pregnant bellies: her own was much bigger, Cadance only having one foal while Luna was having twins —from two different fathers… what would her mother think!— and Cadance’s beauty had only been heightened by the elegant new curve to her buxom frame; it was as if she had always been meant to sport a rounded belly. Luna couldn’t blame magazines all around declaring Cadance as the sexiest mare alive.

Luna’s belly on the other hand, was large and full, her belly button popping out to her great embarrassment, the bulge only highlighting her strength rather than her beauty. Her powerful and athletic body carried her precious cargo with little strain, and strangely enough her image as a powerful dark creature had been softened by an aura of protective motherhood. If Cadance had the air of a pretty mother cat, showing off her future kittens to her subjects, Luna seemed like a black panther, ready to bite off anyone who threatened her offspring.

Her new image completely changed the way ponies reacted when she appeared in their dreams; no longer did they cower before her, no longer did they think she was a part of their nightmare. Whenever she appeared, one look at her rounded belly was enough for them to know she was there to help them. The Mother of Dreams they called her now; Luna couldn’t help but smile at the memory.

Of course, neither her nor Cadance could hope to compete with the pony that had just entered the large ceremony room, to the hushed whispers of everypony present. Luna felt her heart flutter madly as her sister started the long walk down the aisle, and suddenly she could no longer care about anything else.

Celestia’s belly was immense, perfectly round, her long legs barely able to keep it from touching the ground. They had been right to rush the wedding, in a couple of weeks Celestia would be simply too large to walk on her own. Already, she had to walk slowly, her burdened frame swaying from one side to the other, ponies all around awed by the aura of a true goddess of fertility. Her inflated sides almost took the whole width of the aisle, and Luna bristled as she spied a couple of ponies reaching out to almost graze the royal belly as it passed next to them, their hooves hovering close but never having the nerve to actually touch the taunt white coat; all were worshiping Celestia’s pregnant form.

Luna felt her sheath stir at the sight: Celestia’s bulging belly was proof of her virility, her claim over this literal goddess, and she had to strain to keep her member from flopping out in plain view. Now that everypony knew about them, they no longer kept their genitals hidden, but she didn’t go out of her way to display it either: she couldn’t just pop a hard-on in the middle of the ceremony, no matter how much she wanted to pounce on her sister and make love to her in front of all the ponies present.

Her thoughts must have been very apparent, because Celestia gave her a playful wink, mouthing the word later discreetly. The heavily pregnant mare shuffled down the aisle, agonizingly slow to Luna’s taste, but she couldn’t blame her: she had a great burden to carry. So many lives growing in her belly… It had taken hours for the nurses tasked with counting how many foals Celestia was carrying to reach a final count, and they had burst into tears when Luna had requested a recount, just to be sure. Celestia’s spectacular pregnancy had solidified her image as the mother of all ponies, the alicorn becoming more beloved than ever; and to think she was not even half-way into her pregnancy…

Finally, Celestia reached the altar, and Twilight rushed to help her mentor climb the steps, Celestia nuzzling the little alicorn affectionately. A few instants later, Celestia was standing in front of her sister, her radiant smile making Luna’s heart throb with desire.

Cadance began her speech, but Luna didn’t hear any of it, too busy watching her soon to be wife, her eyes roaming all over Celestia. From this close, Luna could smell her sister’s perfume, the flowery scent reminding her of a sunny spring day; but she could also smell herself on Celestia. No matter how much Celestia complained about the mess, Luna always took great care to cover her mate with her abundant and sticky love, particularly Celestia’s bulging belly.

“I do.”

Luna was startled from her heated thoughts as Celestia spoke, the buzzing in her ear preventing her from hearing Cadance’s speaking. She glanced at the pink princess, waiting for Cadance to ask her the question, and she rushed to answer.

“I do.”

Cadance beamed and began to say something, but Luna just couldn’t wait anymore. With a hungry growl she took a step towards her wife and angrily pressed her lips to her sister’s, Celestia’s surprised expression all too delicious. The kiss was much too aggressive for a simple wedding kiss, but Luna didn’t care. She didn’t care about the scandalized whispers from the crowd, she didn’t care about Cadance’s smirk, she didn’t care about the strand of drool hanging from Shining Armor's open mouth, and she didn’t even care about Twilight’s shocked expression, the poor little alicorn blushing like crazy: Luna didn’t care, she was here to show who Celestia belonged to, and she would do so as she pleased.

Luna pressed closer, almost pushing Celestia to the ground, the Solar Princess’ muffled submissive squeals making her blood race, her sheath throbbing mightily. Maybe she should take it down a notch, before her cock made its first public appearance in eons… but Celestia’s panting breath was so delicious, she could feel their bellies rubbing together, and she could smell Celestia was as excited as she was, Luna tried very hard to keep herself sheated and…

The public suddenly inhaled as one, a few ponies shrieking, and several shouts rang from somewhere in the front row: ‘Wow ponyfeathers, look at that thing, it’s huge!’, ‘Land’s sake, AB, cover your eyes!’, ‘Oh my stars… Do you think they are looking for a concubine?’, ‘Oh my goodness, oh my goodness, oh my goodness…’, ‘Wooowy, I didn’t know Princess Luna had a party canon too!’

… oops.

Author's Note

Quick little epilogue by popular request! Might be a little rushed, but I'm short on time, if you see errors please give me a PM and I'll fix em, cheers!