Dorothea and Mercedes succubus AU

(Hey there! This is a kind of silly story that came about because of a joke in a discord I'm in with some other tum writers/drawers. The basics are that it's a Fire Emblem: Three Houses AU where Lysithea is an occultist who is obsessed with bellies--taking from KiwiAnon's series--and Dorothea and Mercedes are a sapphic succubus couple she summons, who are known for their tum lust. Like I said, it's kinda silly, but I hope you enjoy what there is so far! Also lemme know any suggestions you have for it.)

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Lysithea was exhausted.

Hours and hours spent cooking, baking, and ordering enough takeout to feed an entire classroom full of hungry college kids would do that to a person, she supposed. No matter how many energy drinks they chugged down in order to keep their overworked body going. Ugh… Truth be told, she was even feeling kind of bloated from all of those sugary, taurine and caffeine filled drinks… So that was nice, at least.~

But she wasn’t all too interested in her own tummy at the moment. Well, technically she was. That was the entire reason she’d decided to do all of this in the first place after all–to better learn how she could improve her more… Gluttonous side. But in order to do that, she’d need a few other tummies to test and observe; to learn from, and see how best to tackle a feast of the magnitude she was surrounded by.

Cakes, pastries, steaks, cookies, Chinese, Thai, Mexican… Even Greek. Lysithea had pulled out all the stops for this occasion. No restaurant within a thirty mile radius had been spared from Lysithea’s all-out takeout spree. Lysithea didn’t know if it was because they thought she was scamming them, or if they simply thought she was crazy, but… They’d even begun warning each other about her calls after a certain point.~ As she’d found out, after that Jamaican place gave her name before she had a chance to respond to their inquiry.

But none of it was for her–aside from that yummy carne asada she ate a little while ago. No… You see… There was a reason that Lysithea had also purchased a rather unusually large amount of salt a week prior. And no, it wasn’t because she was planning to poison someone or build a bomb. Nothing as trivial and childishly foolish as that.

No. Instead, Lysithea found herself standing in a pentagram made of salt. One of her own creation. The occult was something much more mature.

With an old, tattered book in one hand–one which gave the description and rites of all sorts of demons and other various Hell-ghouls–and a raw steak in her other, Lysithea began chanting. An old ritual, meant to summon a pair of demons most frightful… Psh. If you’re a pastry, perhaps.

“O gulae dominae!” She began, waving the steak through the air with her eyes closed. She felt a chill run down her spine, a subtle light leaking through the crack in her eyelids… “Nunc veni ad me, et ventrem tuum donec disrumpant imple!”

There was a rumble, then a burst of energy that sent Lysithea stumbling backwards and out of the pentagram–and by some stroke of luck, she didn’t end up destroying the salt ring. Though she did take a rather rough tumble, and landed squarely on her rump with a thud… Ow…

Opening her eyes a crack, she realized that she’d dropped the steak in her fumbling as well. Though she didn’t focus on that for long, as she quickly noticed the thick smoke that had filled the room.

Then the twin figures in the smoke… The two… Rather curvaceous silhouettes.

Lysithea felt her heart thundering in her chest as she flattened her palms against the wooden floor below and used them to push herself upwards. Did it work? Did it really work?

Judging by the wet chomping sounds, and what looked like one of the figures licking its fingers one by one… As well as the distinct horns both sported, she figured that the summoning had indeed been a success.

“Mmh.~” Came a husky, sultry voice from within the fog. “Goodness. Haven’t had a tribute that yummy in a long while, eh Mercedes?~” One of the figures in the smoke scooted closer to the other, her chest pressing into the arm of the other silhouette.

“Oh, indeed…” This voice was rather… Sweet? It sounded like the voice of a mother–tender and kind, yet with an air of maturity behind it. It liked to hang on every final syllable for just a second too long… “I do so enjoy when the meat is still dripping. There’s nothing better than a steak, uncooked to perfection.~”

Both of the devilish women intertwined, and Lysithea saw their tails for the first time as they twirled together, settling in the form of a heart as their soft laughter filled the air, mixing with the sweet scents of Lysithea’s baking.

“Hm?” The one who went by “Mercedes” hummed, her head turning away from her companion and sniffing at the air. “My! Dorothea, I can hardly believe it. If it isn’t my very own recipes! Whoever our summoner is, they’ve certainly done their research.~”

“She, dear.” Dorothea replied, nodding to Lysithea. “I know the smell of your own sweets is rather distracting for you, but can you not smell the delicious femininity that has been radiating from her since the moment we arrived?~” Dorothea flashed a smile, which Lysithea was able to see for just a moment. The smoke was starting to dissipate…

“Oh, of course! How rude of us; you’ll have to excuse our lack of manners, dear summoner. It’s just that we don’t get called upon for our trademark skillset very often, and so we’re sort of… Giddy.” As if to prove her words correct, both women began chuckling at once–their laughter filling the air like a pair of schoolgirls whose crushes had just asked them out to prom.

Slowly, elegantly, the pair rose from the floor. Of nearly equal height, the two women were tall enough to tower over Lysithea. They’d probably be able to if I were standing as well… No surprise there. Hmph. Their tails whipped back and forth, their spaded tips helping to waft away the smoke as it finally began to lift enough for Lysithea to get a good look at her succubi…

Dorothea was beautiful. Just… Drop-dead gorgeous. Full, red lips, emerald green eyes, long, flowing hazel hair, and a cavern of cleavage so deep that if one were to fall inside, they’d likely never escape alive… Not that they’d ever want to leave, anyway.~ Not to mention her hips, which looked like they’d give any pair of pants they tried to squeeze into a good workout.

Not that she was wearing pants. Or anything even remotely modest. Dorothea was instead clad in a set of bra and panties so skimpy, so tight, that the straps of her bra squished into her boob-flesh at the sides, and her underwear looked as if it’d need to be cut off of her hips. Her garments were rather shiny as well, looking to be made of some kind of latex or perhaps a polished leather. Below these were a set of stilettos, and some thigh-high stockings that made her thick thighs pool at their rim so deliciously that Lysithea had to convince herself to not try and take a bite…~

Mercedes on the other hand… May have been even more attractive, somehow. It was hard to choose between Dorothea’s abject sexiness, and Mercedes’ restrained, mature, motherly allure…

Her hair was longer than Dorothea’s, though similarly wavy, and of a much brighter shade–so blonde it was nearly white. Her gray-ish silver eyes were kind in a way one wouldn’t expect from a semen demon, and her plump, naturally pink lips were curled up into a smile that could only be described as accepting. She was the kind of woman you just wanted to hug–to curl up with and never let go… Especially given those curves–good god. Dorothea had her beat in the breast-department, but her hips put Doro’s to shame. If you got hip-checked by those, you’d get sent straight to the moon. The things were broader than Lysithea’s many fields of knowledge, and only served to enhance Mercedes’ aura of maternity. Even through their loose, black silk coverings, those child-bearing haunches looked like they’d allow a baby to just slide right out…

Yes, that was something else… While she’d been in the fog, Mercedes had looked just as skimpy as her companion. Her curves had been fully on display. But now that the smoke had lifted–and by some miracle, hadn’t set off her smoke alarms–it became apparent that Mercedes was dressed far more conservatively than Dorothea. From neck to toe, her entire body was concealed by a thin, flowy, black robe. She also had a habit atop her head, with little holes for her horns to poke through–though its fabric was nearly entirely transparent, which allowed her elegant hair to be seen in its entire, voluminous beauty.

Lysithea supposed she shouldn’t have been shocked. There were demons with much stranger choices of attire and interests than a… Nun who liked to eat a lot. The cross that dangled at her neck was upside down, so it wasn’t too blasphemous.

… Or, no, it was. What was the term for unholy blasphemy? Blasphemy for demons?

Whatever. Mercedes was perfectly fine as she was. Heaven and Hell weren’t even all too bicker-y with one another. More like… Competing businesses than anything. So if a succubus wanted to dress up like a nun, who was Heaven to stop her? Succubi had rights, damn it. Lysithea knew all about it. A demon nun was just fine; even if the book hadn’t mentioned anything about Mercedes having a pension for the holy–must’ve been a new thing, she figured. As long as she ate all the same, Lysithea had no issue.

GrRrRRrOoOuUuUWwWwWW!~

rRRrRrRrRRRRRRRNnNNGGghHhHHhh…!~

… And from the sound of things, Lysithea doubted that’d be much of an issue at all.~ Though the succubi treated their roaring stomachs with nothing more than a few idle rubs; otherwise, complete nonchalance. Did wonders to show just how experienced these two succubi were with their particular field of intrigue.

“Well?” Mercedes extended a well-manicured hand to her summoner. “Are you going to introduce yourself? Or were we summoned simply to judge your cooking skills by sight and smell alone? It’d be quite the evil deed to waste two gluttony demons on such a tease…~” The way she phrased things made it seem like–while she’d certainly be disappointed–that wasn’t a horrible thing to do. Has someone done that to them before? What sort of monster would waste such a good tum-growing opportunity… And that much salt too!

Lysithea took Mercedes’ hand and quickly pulled herself to her feet, dusting herself off and coughing out a puff of smoke. God, had she held her breath for that long after seeing these two? Just how Bi was Lysithea?

“Sorry. My name is Lysithea von Ordelia. And I promise, I am not some kind of goth lolita; that’s my actual name.” Lysithea was glad she’d chosen to wear her purple skirt, tights, and gray checkered turtleneck sweater tonight… Instead of her black, corseted dress. Would’ve undercut her argument a bit. “So, now we’ve all been introduced, I have the upper hand since I know yours–very kind of you to give them to me first thing, by the way, thank you…” She nodded to both, and they nodded back. “... So, without further ado,” Lysithea scuttled over to the nearby coffee table, picking up the camcorder that rested atop it and turning it on. “Begin whenever you’d like.”

Both succubi were a bit taken aback by Lysithea’s camera, with each of them responding with a similar kind of curiosity-tinged smirk.

“You know, dear,” Dorothea said, taking a step forward. “It’s polite to inform those you wish to record beforehand…” She stepped closer and closer, her hips swaying side to side with each slow step… “... But I suppose we can let it slide. Just this once.~” Lysithea almost recoiled when Dorothea’s soft, warm hand slid against her chin as she walked past, her spaded tail lightly whipping against Lysithea’s chest and turning her cheeks a light shade of red. Just stay focused on your goal, Lysithea… Research, that’s all this is… Watch and learn from the best, and you’ll figure out how to grow your tum just like them…~

She turned back after Doro continued walking towards one of the tables filled with food…

… Only to find Mercedes stripping.

The holy succubus had allowed her robes to slip from her shoulders, revealing a white nun’s collar that was attached to a bit of fabric that led down into her concealed chest… Then Mercedes let the robe drop to the floor, and Lysithea gasped.

So much for being conservative. Mercedes’ outfit was more risque than Dorothea’s! Those bits of fabric on her chest were the only things keeping the woman decent–the elongated triangles of white cloth hanging down in front of where her nipples would be, but allowing Mercedes’ breasts to sit unsupported. No bra or top to be seen otherwise. Around her stomach sat an X of loosely hanging chains, which attached to a fishnet that sat over her lower belly–just below her navel, and covering her pubic region. Her groin was left uncovered other than that, with only a C-string keeping her from being totally exposed. Her legs were entirely covered, but… Their coverings were somehow more lewd than if she’d been entirely nude down there! A pair of “Leggings”–more like stockings which came far too high on the legs–that seemed to be made of the same shiny fabric as Dorothea’s clothing. They did not cover Mercedes’ groin or inner rump, and only came up to her lower hips–where they squished into the bountiful flesh that had gathered there like dough tied with string–kept her legs covered. And her groin and ass exposed… Good lord…~

She smiled at Lysithea with that same motherly smile–which somehow seemed a little more electric now–and walked on past after politely thanking her. The sway of those hips, how that rump jiggled as she walked… It was like every last calorie the woman ate landed on her hips! Guh… And the tail of her C-string wrapping around the base of her tail too…

Lysithea didn’t falter. She was determined. These succubi were just doing their jobs, and she needed to do hers as well. Observe. Record. Experiment. Figure out what made them so good at what they did, then copy it.

And so, as Dorothea plucked up her first gingerbread cookie, and Mercedes used her tail to cut into a pumpkin pie… Lysithea joined them at the table, camcorder in her hands.

Knuckles white as snow.

• -

“I tend to start with smaller, more easily digestible things first. I find I can fit much more in later on that way.” Mercedes explained, taking a bite out of the large pie slice she held in her hand, and probably making its twin in her other hand rather jealous. “But tonight, I find myself willing to try my companion’s technique. Besides, I couldn’t resist getting a good taste of the pumpkin pie. It was always one of my favorites among my many recipes.~” She smiled, pushing the rest of the slice into her mouth all at once and allowing her tongue to lap up what remained on her hands after the bulge in her throat had moved to her stomach.

Dorothea had finished her cookies already, and had proceeded to wash them down with the entire half-gallon of milk that Lysithea had sat out for her two hungry guests. She thought for a moment that she had underestimated the succubi. Then she remembered the Greek place already having her card on file, despite the fact that she had never ordered from there before. No, there would be more than enough here to fill these two… And for Lysithea to record what she needed from them as well.

She wasn’t some kind of pervert. Absolutely not. She had summoned the pair to uncover how the best of the best gluttons in all the world managed to fill their bellies to bursting without cramping up halfway through. And she had explained this to them, after the pair had begun their routine teasing of Lysithea. Asking her to rub their bellies, subtly shaking their behinds or breasts in her face… Not what she needed. And so what if they didn’t believe her because she just so happened to be blushing? Anyone would blush in this context–it was a perfectly standard biological reaction!

Humph. Anyway. Dorothea hadn’t stopped there. She moved on from the sweets, and directly into a container of chili Lysithea had ordered from a nearby barbecue place. Speaking from experience, Lysithea knew just how mind-blowingly tasty–and spicy–that chili was. As such, it both shocked and hardly surprised her to see that Dorothea had already downed the entire bowl in under five minutes. And if the spice had phased her at all, she certainly didn’t show it; she didn’t take even a moment’s reprieve before cracking open a can of lemon-lime soda–the kind that was extra carbonated–and chugging the entire thing in seconds. Lysithea watched–and recorded–as Dorothea’s belly slowly swelled centimeter by centimeter as the gassy liquid fell down her esophagus like water down a waterslide. Its growth continued even after Dorothea had pulled the can from her lips and crushed it, only ceasing when the devilishly seductive succubus placed her fist at her lips and-

BWwWWWOOoOOOOOUUUUUUUUHHHHHHHUUUUUURRRRRRRP!~

“Pah!~ Ooh, nice one, me! Way to start the night off with a bang, girl.~” Dorothea cooed to her stomach, then giggled, as her free hand pawed gently at her slight curve of a belly. So much gas had erupted from inside her guts that the tum’s formerly-orb-ish shape had deflated back into a rather small food baby. And it was even growling again…

“W-What was that?” Lysithea’s voice cracked, and she tried to hide her blush with the camcorder. “That little exercise you just did. You… It was like you blew your gut up like a balloon by filling it with a bunch of gassy stuff all at once.”

“Why yes. That’s exactly what I did.” Dorothea’s smile peeked out from behind the hand at her plump lips–a much smaller burp coming up and proving her fingers effective at blocking the gas’ advances. “It’s a little trick I discovered not too long ago. About… Two centuries ago, I want to say?” She looked over at Mercedes–who was making quick work of a mixing bowl filled with… Was that chicken tenders and vanilla pudding?–and the un-holy woman nodded. “Basically, I fill myself with as much gassy food and drink as I can, then let it all build until I feel like a balloon seconds from unleashing confetti all over some ten-year-old’s birthday. Then I just let it all out.~” Another seductive giggle, another pawing at her tummy. Was Lysithea seeing things, or was it still slowly, subtly growing on its own…? “It helps stretch me out at the start of a stuffing or bloat–that way I can fit more later on.”

“According to someone I know, it also–Urp!~–quote, ‘Feels like the best thing in the whole damn world to feel all that gas roar out of you like you’re a fucking dragon spewing fire.’” Mercedes said in a single breath, with a semi-smug tinge to her maternal grin keeping it company.

“Well, yes, there’s that too of course.” It was Doro’s turn to blush–surprisingly–though she did her best to hide it, turning away from Lysithea and scanning the table for what was next to join the bubbling fun in her gut.

As she did–eventually settling upon a gyro–Lysithea turned her attention back to Mercedes. She had finished off that bowl of whatever-the-hell she had been devouring mere moments ago–and though her stomach was larger than Dorothea’s by a good inch or two–with her food baby being composed nearly entirely of just that, rather than Dorothea’s gaseous bump–she showed no sign of slowing in the slightest. Though she had indeed made good on her word, and was now working her way through a pan of mini-muffins.

“Good to leave room, you know?” She said with a wink, poking her tum and showcasing just how squishy it was. Not from fat–heavens no. All of the woman’s plumpness seemed to have settled on her hips. Instead, Mercedes’s gut was simply so elastic, so spacious, that the relaxed muscles and organs just squished inwards at the touch instead of putting up even a touch of resistance. “Oh!” Mercedes jolted a little as Lysithea suddenly stepped closer, her camera focused in on the “Nun”’s tum. “I suppose it might look rather odd, hm? I promise you, I am filling up, not fattening up. You can even feel all the food inside if you’d like to touch-”

“No thank you.” Lysithea blurted out. She then forced herself to blink the dryness away from her eyes, and regretted that she’d closed them even for a second. “As I said, I intend to study you two. Not b-bed you.” She grunted through warm cheeks, clearing her throat for… No reason in particular.

“Anyways. I do have some questions if you wouldn’t mind.” Lysithea backed away, letting the camera settle on a view of Mercedes’ face as she gulped an entire muffin in one piece, then gave the camera a quick, wholesome wave and smile. “S-Starting with… Erm… H-How are the two of you not full yet?” A rather embarrassing question, considering that… Well, Lysithea would’ve likely been curled up in bed, clutching her spasming stomach in pain before she ate even half of what these girls had.

“Practice.” Both women spoke at the same time, their voices ringing out as one as their stomachs gurgled in sync. Then, both broke into a rather similar sounding giggle fit.

“Oh, apologies.” Mercedes wiped a tear from her eye after she’d settled. “We’ve been together for so long now, we might as well be each-other’s halves.” She smiled at Dorothea, whose tail subtly wagged in response. “But to answer your question… We do get full, of course. Why, we’re ‘Full” right now, if by ‘Full’ you mean sated. But if you mean ‘Unable to stretch even an inch more without splitting in two…’ Then no, we aren’t full in the slightest.~”

Both women’s hands worked on their stomachs for a moment, allowing Lysithea to get a good shot of how they each handled their bellies. Mercedes’ touch was more gentle, as was to be expected. It was more like she was petting a beloved animal than she was attempting to soothe her belly into submission–though when it seemed to stretch so effortlessly in the first place, doing so seemed rather redundant. Apparently Dorothea didn’t get the memo however, as she really dug her palms and fingers into her gut, smushing it all around, bouncing it in her grasp–seemingly doing her best to keep things as upset inside as possible. What a strange method…

“And well,” Dorothea paused to burp before continuing on. “We’d be lying if we said our demonhood didn’t give us an advantage. Still, it isn’t like humans can’t get as big as we do–it just takes a good deal more determination and guile. Moore… Dare I say… ‘Guts?~’” She chuckled, and her stomach swelled outwards just a tad at each bounce the laughter forced it to endure. “Sorry, sorry, bad joke. Petra must be rubbing off on me. But yes, we’ll do our best to guide you in a direction that’ll allow you to grow your guts like the greats.~”

“Alliteration too, dear? Seems our little Annette is influencing you too.~” Mercedes’ smile pulled a little tighter as she took a few steps closer to Dorothea, settling in at her side. From this viewpoint, the sides of their tums looked like they could touch… Not at the moment. They were far too small for that–didn’t even reach past their impressive bosoms. But that was something to look forward too…~ F-For research’s sake.

“Yeah, I guess so.” Dorothea rolled her eyes, then gave a half sigh, half laugh. Then she turned to her side, pulling Mercedes closer–the suddenness of the motion causing the cloth over Mercedes’ breasts to fly up for a second, exposing the black, heart-shaped pasties she was wearing underneath. Dorothea’s breasts and belly squished into her lover’s arm and side like a slime from a horror movie, doing its best to totally envelop its victim.

“But either way, we’re gonna do all we can to help your ‘Research.~’ We don’t get summoned for this type of thing often, and so it’s always sort of a special occasion. Almost like a renewing of our vows.~” She batted her eyes at Mercedes, and the other woman’s smiling lips trembled as a slight blush crept up on her cheeks.

“Indeed. A-And besides… It isn’t like your research has to be all stuffy and professional, correct? Surely you can get a little hands-on…~” Mercedes’s blush grew as she gave her tum a little smack, sending it rippling for but a moment.

Lysithea considered her options… But came to a conclusion rather quickly. There was just no other option, she had to do it.

“... I-If you two could get back to eating, p-please… Not to be rude…” She meekly said, fidgeting slightly behind her camcorder-mask.

The smiles faded from the summoned demons’ faces, and they took a half-step away from each other. They stood there for a moment, each studying Lysithea–looking her up and down as if they… As if they were looking for a weak spot. D-Did Dorothea even sniff the air?

… Then they shared a side-eyed glance, devious smiles appearing on both their faces. Even on Mercedes’, her motherly visage taking on the look of a parent who was doing a purposefully terrible job at hiding a secret from their child…

“If you say so…~” Mercedes said, turning around with a wag of her child-bearing hips… And tearing her hands into the blueberry pie. She shoveled handfuls at a time up to her mouth, and gulped them down whole–large bulges able to be seen traveling down her throat and settling heavily into her stomach. It only took a few minutes for the entire pie to disappear down Mercedes’ gullet–and for her part, Dorothea had masterfully done-away with a greasy bucket of chicken.

Both women looked dead-on at Lysithea as they licked the residue of their meals from their fingers… Then smeared the saliva on their guts, wiping their hands clean, giggled, and turned back for more.

Oh god. What had Lysithea done?