"...and it is my, ahem, privilege and joy to pronounce you wives. You may kiss your bride."
Chrysalis smirked as Princess Luna's voice trailed off. Her little stutter during the ceremony had been barely perceptible, but the Queen of the Changelings - and newest Princess of Equestria, by marriage - took good note of it. Clearly her dear sister-in-law had not quite gotten around to full acceptance of the auspicious event taking place.
Not that Chrysalis really cared for approval.
She was shaken from her spiteful glee by the telltale tinkle of telekinesis nearby, and was surprised to see her black wedding veil lifted from her face by Princess Celestia's signature golden magic. Looking up at her, Chrysalis was shocked to notice - and feel - genuine love in her eyes. Without even thinking about it, Chrysalis fed on the freely given emotion, her normal ever-present hunger fading rapidly as Celestia's - her new wife's - love flowed freely.
Celestia, in turn, lifted her own veil, and as Chrysalis stood in a nonplussed stupor, bent her neck to meet Chrysalis's lips in a surprisingly passionate kiss. Chrysalis's eyes widened, and her dark cheeks blushed a toxic green.
The crowd stomped politely, if not enthusiastically - though Pinkie Pie's excited shriek and cheers could be heard from one of the front rows. That mare could never be anything less than her most excitable when a party was ahoof - even if the occasion for said party was the much-debated political marriage between Equestria's beloved Princess and one of the nation's most reviled enemies.
As the kiss went on, however, Chrysalis caught herself putting the political aspects of the marriage on hold. She wasn't about to look the wedded horse in the mouth if free love was forthcoming.
Though she might have to slip away during the reception to loosen her dress. She could already feel it tighten around her rapidly engorging middle, as the sudden surplus of love filled her ravenous system.
* * * * *
The doors of Celestia's personal bedchamber closed behind them with a soft click, and the Princess let out a sigh. The reception was over, the hundreds of meet-and-greets with foreign dignitaries taken care of, and the snide remarks of air headed nobles taken in stride. Now she could loosen her dress, relax...
"About rotten time we got out of there. I swear, if I had to endure the sight of one more sneering noble, I would have dipped them in honey and thrown them in the grub feeding pits!"
...and get to know her new wife properly.
"Come now, Chryssi," Celestia said softly, as she began to unlace her dress. "You can't honestly say you didn't know everypony in Equestria would be violently opposed to our courtship."
"'Courtship', you say, Celestia, as if we were two blushing young lovers dancing around each other with flowers and chocolates." Chrysalis snorted derisively, unceremoniously teleporting her dress off herself to crumple on the floor. "It was a deal, a political trade. You know that as well as I, wife of mine."
With a dramatic gasp, Celestia threw herself onto the bed. "Oh", she cried, fake emotion heavy in her voice, "Such horrible things my wife says to me! Barely married for a few hours, and it seems I'm already doomed to a life of loveless, frigid misery!"
Rolling her eyes, Chrysalis walked over to look down onto the alicorn as she lay sprawled on the bed. "Enough of this foolishness, Celestia, it does not become you. Remove your dress so we can complete our wedding act."
Celestia gave Chrysalis a deadpan look. "Wow, Chrysalis, you'd think a species that feeds on love would have better seductive skills than the average newt."
"Why waste my breath when you are perfectly willing already, Sun-butt? I've fed on your love ever since the ceremony."
With a smirk, Celestia's horn lit up, and Chrysalis stiffened as she felt the tickling touch of telekinesis stroke her lower abdomen. "Yes, love-bug, I can tell. You fill out very nicely when you're well-fed." A squeeze, and Chrysalis gasped, blushing green again. "Mm, yes, very nicely indeed. Come then, my Queen. Let us consummate our union."
* * * * *
Chrysalis stood, stiff and panting, as Celestia's magic continued to massage her soft, swelling abdomen. She was locked in an internal battle between outrage and arousal - she was supposed to be the dominant one! The Queen, the predator!
Well, time to take control.
With a snarl, Chrysalis lunged and landed, spread-eagled, atop Celestia, who recoiled and whinnied, her magic snuffing out. Chrysalis didn't let her back away, though - she bent her head down and mashed her lips violently against Celestia's, as her rounded stomach pressed the larger alicorn down onto the bed.
Celestia, shocked at this sudden, violent turn, resisted for a few seconds - before, with a contented murmur, she relaxed and pressed into the kiss, forehooves cradling Chrysalis's head.
Growling with arousal, Chrysalis fought for dominance. Her long, forked tongue slipped past Celestia's lips and wrestled her rounded one for dominance. Their lips kept mashing together, painfully, and one of Chrysalis's fangs drew blood. The coppery taste mingled with the taste of champagne and sweets - the aftermath of earlier in the evening.
With a gasp, Chrysalis finally broke the kiss, and both she and Celestia drew deep, panting breaths, sweat starting to bead on their brows and necks.
"Haaah," Celestia breathed. "Love-bug, if I didn't know better, I'd think my teasing had made you angry with me."
"Sssss," Chrysalis hissed, her eyes narrowed. "Well, Sun-butt, perhaps it has. Perhaps your Queen means to punish your insolence."
"Meep." Celestia blushed, crimson, and drew her forelegs up to her chest. "Whatever will the wicked Queen do to me?"
Chrysalis grinned, showing fangs. "That is for me to know, and you to find out."
She lunged, down, and sank her teeth into Celestia's neck, just beneath her chin. Celestia gasped - she felt the prickle of fangs through her soft pelt. Sharp, dangerous, lethal - but they didn't break the skin. They pressed in, but just barely avoided drawing blood. Goosebumps blossomed all over Celestia's hide, and she whinnied with a mixture of fear and desperate arousal. She felt her nethers burn with sudden need, and one of her forehooves moved down her barrel towards her aching -
Chrysalis growled, and caught Celestia's wandering limb with her magic. She released her hold on Celestia's neck, and lifted her gaze to look the Princess in her eyes.
"Naughty, Princess." She whispered, and rubbed the side of her face against Celestia's cheek. "We'll get to that, but not until I decide it is time." Her warm breath made Celestia's ear flick and sent a fresh wave of warmth through her core. "I am the Queen, and until our marriage is wholly complete, you are but a Princess. I outrank you."
Chrysalis felt Celestia shiver beneath her, and smiled. Once again she bent to tease along Celestia's sensitive neck. She nipped gently at the skin, eliciting moans. She licked in long, slow strokes through Celestia's pelt, the flesh twitching beneath her ministrations.
"Chrysalis, please..." Celestia gasped, in between heavy breaths. "I..."
Chrysalis knew exactly how desperate Celestia was. The Changeling fed on the raging torrent of love and lust, and felt her depleted reserves fill, her power grow. Her abdomen was glowing, now, a radiant pink, as so much love and lust was being absorbed she couldn't take care of it all. Her stomach swelled, ballooning out in a soft, stretching dome... and Chrysalis felt, deep within her, a need.
Her own arousal mounted, and she could feel her reproductive organ stiffen and emerge from the well-hidden opening in her carapace that housed it, oozing slick lubricant and nutrition-rich fluids. Inside her womb, the rapidly maturing eggs swelled with life, their development kick-started by the sudden deluge of love.
She needed to lay.
"Say it, Celestia," she gasped, as she ripped Celestia's dress open with her magic, exposing the Princess's belly and dripping, twitching slit. "Beg for it."
"Please!" Celestia pleaded, desperation in her voice. "Chrysalis! My Queen!"
"As you wish, Princess!"
Chrysalis paused, lining her pointed, slick ovipositor up.
Celestia opened her eyes, and looked down, her eyes widening with surprise, and realisation.
"Wait, Chrysalis, don't-!"
Celestia gasped, as Chrysalis hilted herself in a single thrust. The Queen pulled back, and slammed back in, making Celestia whinny with pleasure.
"You will make a fine broodmare for our young," Chrysalis growled, her forehooves resting on Celestia's shoulders, her swollen belly rubbing against Celestia's. "They will feed on the very power of the sun itself, and be the most powerful Changelings this world has ever seen!"
Chrysalis moaned with each thrust, her ovipositor coating Celestia's insides with slick fluids. They splashed against her cervix, relaxing the stiff flesh, making it soften... until it gave way completely, and the opening into Celestia's very womb lay bare.
Celestia could do nothing but gasp and whinny, as the sensations of Chrysalis's ovipositor writhing inside her and the strange feeling of her relaxing insides was too much to bear. It was too late to stop Chrysalis - or to warn her. Celestia saw through barely-open eyes as three round shapes moved under Chrysalis's glowing flesh - massaged down towards their joined crotches.
Chrysalis felt the first of her eggs enter her ovipositor, and grunted with effort as the solid mass slowly moved through her reproductive organ. With every thrust, another inch. Slowly, ever so slowly, it pressed through the combined pressure of the ovipositor's flesh, and Celestia's tight, sweltering tunnel.
Celestia felt, and saw, the first of the three bulges move through Chrysalis's flesh and into her own. It slid against her winking clit, and pushed her over the edge. She shrieked with pleasure and arched her back, her form wracked with climax.
Chrysalis moaned. Celestia's climax overwhelmed her with a fresh wave of love and lust, and she felt the eggs within her pulse with fresh energy. Her ovipositor stiffened again, and she felt the first egg slip its grasp and burst through Celestia's tunnel, followed by spurts of fluid from the ovipositor.
Celestia's stomach bulged with the new invasion, and as she rested a hoof on her own stomach, she cried out again in another, involuntary climax - since that egg was only the first, and the second was rapidly making its way into her, the path being paved.
Chrysalis's moans had changed to ecstatic shrieks of pleasure. With every thrust she felt her egg inch further into her broodmare, the awesome sensations burning through her entire body. One more thrust, two, three - and with another spurt of nutritional fluid, it burrowed into Celestia's swelling womb. The third was already lined up, and as Chrysalis redoubled her thrusts, eager to keep her conquest going, she and Celestia screamed together in joined climax.
Barely conscious, Celestia felt the final egg move up into her, Chrysalis never ceasing her purposeful thrusts.
Chrysalis, exhausted, sank herself into Celestia's burning, lustful slit one last time, and the last of Chrysalis's brood joined their siblings inside Celestia's womb.
* * * * *
Celestia lay panting, slowly coming down from her violent, alien climaxes. Chrysalis lay on top of her, seemingly asleep, her ovipositor still resting inside Celestia, though it was slowly shrinking down from its aroused, stiffened state.
Anxiously, Celestia rolled Chrysalis off of herself to get a better look at her belly. Bulging with Changeling eggs and fluids, it ballooned out as if she was pregnant in the second trimester. She could already feel soft movement from within the three alien orbs that inhabited her - clearly alive, yet too young to make out any distinct features.
'Perhaps these unusual circumstances are enough to not trigger the reaction,' she thought, worriedly rubbing a hoof over the swell of her belly. 'Maybe there is time to-'
A sudden, rapidly building golden glow from within her belly stopped her thoughts cold. She felt a monstrous hunger build as her stomach growled, and her vision went gold as her eyes lit up with internal, magical light.
'Spoke too soon,' she thought, as she turned her attention to the sleeping Changeling Queen lying on the bed, legs starfished and still visible ovipositor peeking out of her lower abdomen. 'I'm sorry, love-bug... But you look good enough to eat.'
The ravenous hunger was familiar to her. She made a token attempt at fighting the irresistible need, but as always, she could not help herself. She was in the grip of an unstoppable bio-magical imperative - the need to grant her growing children sustenance.
And an entire Changeling Queen, gorged with love and at the peak of her power, would be just the protein bomb they'd need.
Celestia sat down on her haunches on the floor at the edge of the bed. Her magic suffused Chrysalis's form, eliciting a sleepy mumble as it tickles across her carapace. Then, as her telekinetic grasp dragged the rear hooves of the Changeling Queen within grasping distance, Celestia lifted them to her mouth, and began to feed.
Her taste was sublime. Celestia savored it, as she stretched her lips over Chrysalis's hooves and licked every single inch of them. The magic that had a hold of her easily stretched and molded her flesh to fit the massive meal, and as Chrysalis's hooves reached the back of Celestia's mouth, she swallowed.
The two joined bulges of Chrysalis's hooves stretched Celestia's graceful neck, a grotesque display of consumption. The Princess herself, however, gripped by her unspeakable hunger, was only focused on bringing more of hey prey into her. She swallowed with purpose, moaning with delight, as her mouth filled with the slick carapace of Chrysalis's calves, then thighs, her mouth and throat stretching to accommodate them.
The Queen herself moaned in her sleep. The strange, warm sensation was rousing her from her slumber, and she blinked bleary eyes.
Celestia took note of her prey's awakening, and quickly intensified her magical grasp on Chrysalis. Her golden magic swirled tightly around Chrysalis's hooked horn, suffocating the Queen's own magic beneath the overwhelming power. Her meal once again secured, she closed her eyes and lost herself in the reverie of delicious flavours - salty sweat, mixed with the exotic taste of Chrysalis's own flesh, and her sweet, nutritious egg-laying fluid that had soaked her crotch and thighs. Murmuring with delight, Celestia spread her lips over Chrysalis's hips, and tasted her flaccid ovipositor.
The warmth engulfing her sexual organ startled Chrysalis from her stupor. She listened to Celestia's moans of delight and the loud sounds of her purposeful swallowing - then looked down to see her lower half engulfed in Celestia's bulging throat, hooves disappearing beneath Celestia's ribcage. Even as she watched, the tip of her ovipositor, pressed against her still-round stomach by Celestia's lips, slipped completely into the ravenous Princess's mouth.
"What is this!?" she shrieked. "Let me go, you freakish monster!" she struggled, but found her forelegs held tightly over her head by Celestia's magic - the same magic that utterly suppressed her own and rendered her powerless. "How can you do this!?" she yelled, panic beginning to slip into her voice.
Celestia opened her eyes, still shining brilliantly with internal light, to meet Chrysalis's with a compassionate expression. She lifted a forehoof to stroke Chrysalis's cheek - while the other pressed the Queen's bulging belly into her maw.
"No, no, no!" Chrysalis yelled again, writhing and kicking her legs within Celestia's throat. She could see her own buttocks stretch the flesh at the very top of Celestia's throat, right beneath her cheekbone - and her kicking hooves were just beginning to show through the flesh of Celestia's belly. A few more swallows, and Celestia's lips were stretching over the carapace where Chrysalis's thorax met her neck. Chrysalis felt the Princess's blunt teeth and seeking tongue rub along her flesh.
It would not be long now, Celestia knew. She sat up with her neck straight towards the ceiling, lifting her prey up. The sudden shift of gravity made the last few inches of Chrysalis's neck slide through her lips, and she felt the Queen's haunches splash down into her bulging stomach. She idly rubbed the swelling, writhing flesh, as Chrysalis again redoubled her fighting, rear legs kicking against her wet confines.
"Stop it, please!" Chrysalis pleaded, as she felt Celestia's lips slowly creep up her neck. Her chin was engulfed. Then her snout. She tried to scream as her vision was obscured by Celestia's upper jaw, but all that was heard was a muffled mumble from Celestia's mouth.
Celestia paused, only Chrysalis's horn visible outside of her mouth. Her cheeks were bulged wide, almost comically, and Chrysalis's gnarled forelegs stuck out of the sides of her mouth - like a particularly well-gnawed stick in a dog's jaws.
Finally, with a single big gulp, Chrysalis's head was pushed from within Celestia's mouth to her neck, her still-screaming visage clearly visible through the Princess's stretched skin. Then, she opened her mouth wide and flung her head back, like a crocodile with a mouthful - and Chrysalis's two gnarled forelegs were chomped down.
* * * * *
Celestia opened her eyes to find herself lying on her side, the hard stone floor pressing up on her and a massive, wriggling swell of a belly rising above her. She made to sit up, but as she moved a rumbling sensation worked its way up from her belly, and she opened her mouth to release a thunderous belch that shook the chandelier above her.
"Oh, my poor love-bug." she said wistfully, rising to sit on her haunches and cradle her massive belly in her lap. She rested her chin on top of the swollen dome, and sighed. "I wish you had told me your intentions, so I might have warned you."
"Warned me!?" came the outraged, if muffled, reply from within Celestia's stomach. "Hah! This was your plan all along, wasn't it, Princess? Fool me into your bed so you can devour me in my sleep! Well congratulations! I hope you fatten up so much the filthy ponies call you Lardlestia!"
"Oh, love-bug," Celestia cooed, rubbing her hooves over her belly comfortingly. "I had no more control over this than you did. Have you never heard of praying mantises?"
"Mantises?" Chrysalis queried, venomously. "What do they have to do with anything?"
"Much like the females of those insects, Chrysalis," Celestia said, "Alicorns are compelled after fertilization to seek out large, protein-rich meals to feed the growing young. I, and the other Princesses, have no control over this, I'm sad to say - and we are, through some magical quirk I cannot fathom, uniquely adapted towards eating pony-sized meals whole during this feeding frenzy, if you will."
"Impossible!" Chrysalis exclaimed angrily. "I've seen Shining Armor running around with that princess of his and their oh-so-adorable daughter! How come he wasn't eaten after they rolled in the hay and bred that little demon?"
"We took precautions," Celestia stated, "As modern medicine thankfully allows us to do. We artificially inseminated Cadance in an isolated building far from any other ponies - then let her lose on a few hundred pounds of Griffon cuisine. Luna and I never had that option earlier in our lives - after the first few incidents we decided to remain childless. There was no way we could ask a pony we loved to sacrifice themselves thus... you, however, Love-bug, never gave me the chance to explain. I didn't expect to come out of this marriage impregnated!" She smacked her lips thoughtfully. "Well, I suppose this will quiet all the objecting voices... and, if it's any consolation, love-bug, I can say that you were very tasty indeed."
All Celestia received in reply was a particularly solid kick that struck through her bulging stomach to impact her snoot painfully.
Rubbing her aching nose with a hoof, Celestia grumbled and rolled over, squishing her belly beneath her(which earned her a choice selection of Changeling curses). She put her hooves down and just barely managed to rise from the floor, thankful to not have been rendered completely immobile. Waddling, she made her way into the bathroom, heading for the shower.
As she waddled, her massive stomach swung from side to side beneath her, and she had to struggle to not lose her balance. She paused in front of her full-size mirror, and beheld her form.
Her mane was matted with sweat and tangled in several places, the normal flowing shimmer dulled. She had caked drool around her mouth and in stains on her neck and chest. Her wedding dress still hung from her shoulders, though it was now mere tatters - ripped down the middle and hanging in ruined shreds from her bulging belly's sides. With an annoyed huff, she set it alight and burnt it off her, the flames not even singing her fur.
Finally, her huge belly. At its widest, it hung so low it barely avoided touching the floor. An uneven, shifting bulge that showed every twitch and kick Chrysalis made - though she had mostly stopped her actual efforts to fight her way out. Either realizing the futility of it, or simply exhausted. Celestia felt it a bit insensitive to inquire.
Nearer her sex, however, was an additional, smaller bulge - her little Changeling children, growing within their egg sacks. She looked at the gravid swell with a conflicted expression. Then her eyes softened. She stepped into the shower, and set the water flowing over herself.
"I can at least promise you this, love-bug," she said gently. "I'll take good care of your children, once they are born."
* * * * *
As Celestia was brushing the tangles out of her moist mane, she heard an urgent knock on her door.
"Well," she sighed, casting another glance at her bloated form in the mirror. "Might as well face the music."
She waddled slowly into the main room and tossed a robe over her shoulders and back - she didn't even attempt to close it, no chance of that in her condition - and settled on her side on the plush carpet in front of her fireplace.
"Come in."
"Princess Celestia," started one of her Royal Guards, "I'm sorry, but the Changeling attendants demanded to - By Cel- err, by the stars, what happened to you, Princess!?"
"It is a long story, Sergeant," Celestia said wryly, eyeing her own stomach sidelong. As she lay now the top of it was level with her head. "Do let our guests in, I have quite an explanation lined up for them."
A pause. "Very well, Princess." He stepped aside and made an inviting gesture with his wing.
Three Changelings trotted in to line up inside the door, facing Celestia without any outward sign of surprise. They eyed each other, nodded, and as one kneeled down.
"Princess Celestia," the middle one started, "You have devoured Queen Chrysalis. As the victor of the ancient Succession Struggle, you are our new Queen. All Hail Queen Celestia of the Changelings!"
Celestia blinked.
Oh.
Author's Note
Yep, things got weird, again. They always do when I write stuff. 
Those of you ~~sickos~~ ~~freaks~~ ~~monsters like me~~ honoured readers who have read my earlier stuff will be happy to know that yay! I am not dead! 
I do apologize for how long its taken me to resurface. Things have been wild lately - more wedding than I can shake a funeral at, travels, new house, lots of random crap at work. The usual. I make no promises about when I show up next again, but I'll give it a good sporting try.
You will also notice that this one is a bit different - more explicit in the sexings, and an extra freaky kink on top for good measure. It is also unconnected to my other two stories - while those can be said to take place in the same "Voreverse", if you will, this one is wholly unconnected to them - except for theme. 
As this was the first one where I went very explicit in the babymaking department, do point out if there is something I could improve for next time. And, of course, if you spot any weird grammar oddities or spellings feel free to point them out so I can clean them up!
Finally, I might have room for a little epilogue like thing in this here story, but I have no set plans for how it would look or when it could be ready, so I'll mark it complete for now. You'll know if it shows up.