"Come on Shy, you know you wanna! It'll be the best experience of your life!"
Fluttershy mumbled an answer resembling "Okay" from behind Pinkie Pie, both staring at the very tall, very hungry ruler of Equestria.
 Celestia had asked Pinkie to help out with one of Twilight's lessons and to bring a friend along. Neither had expected this but nor had they run off. Curiosity bit at them both like an inpatient mosquito.
 Celestia explained; As ruler of Equestria, and as the force that raised the sun every morning, she needed to eat, and as citizens and close friends of the princess, who were they to refuse? Fluttershy didn't understand how Twilight came into it in any form but obliged, not before asking some questions first.
 "So um... what's going to happen, I mean, to us, if you eat us?"
 Princess Celestia smiled warmly at her and began.
 "Well, dear, first I'll take you into my mouth, and softly swallow you down, so that you both enter my stomach, and there you will be gently massaged to sleep. From there, you will both provide nourishment and energy to me on your journey, slowly and safely making your way through my body, giving me useful nutrition and water as you go. Once you're done, I'll let you both out carefully and smoothly in front of your friend Twilight, so she can be there to greet you."
 "That *does* sound nice. It would be nice to see Twilight afterwards too..." Fluttershy responded obliviously.
Pinkie Pie quickly corrected her:
 "Oh Fluttershy, Celly's saying she'll turn us to poo! Princess poo can't see, so how would you see Twilight, silly? We're gonna be so mushyyyy and stinkyyyy... Isn't that so cool?!"
 The cotton candy coloured mare bounced up and down at the apparently amazing news. Fluttershy responded with a quiet "Oh" and a small blush, but didn't object.
 Celestia's horn glowed as drool began to leak from her waiting maw.
 Pinkie went first, sliding down the royal gullet like it was a water slide, complete with a squeal, whilst Fluttershy was lowered in gently afterwards. As Celestia's stomach rumbled in approval of the meals, Pinkie slowed down as she was squeezed into the Princess's belly. Halfway through the pyloric sphincter, Shy slid in face to face with her, both blushing at their intimate predicament.
 Celestia loved lunch like this. The squirming, the softness of flesh and the feeling as they slid down her throat to rest in her tum. The feeling of content fullness was like no other, succeeded only by the knowledge of what she'd be doing to her willing occupants in the coming day.
 After some excitement at their situation, the two friends were softly lulled to sleep by the rythmic beating of their ruler's heart and warm embrace.
Celestia moved to her large bed and lay down on her side, enjoying the feeling of fullness.
 She began to doze off, thinking about her visitor later and what kind of...
 --Many hours later--
 Celestia's cheeks reddened as she heard a knock at her door.
"Come in!"
Her most trusted student, Twilight Sparkle trotted in and looked upon her teacher.
 "You're well fed!" She blurted out before covering her mouth with a hoof.
The ruler laughed and patted her side, beckoning Twilight to lay next to her.
"Even I have to give in to indulgence sometimes. When cake isn't enough, I have turn to certain more... Unorthodox meals, as you know."
 Twi murmured knowingly and lay into her mentor's side. It gurgled.
 They stayed like that for some time. Twilight talked on the going's on in Ponyville, Celestia interjected with musings and responses, and they both bathed in the comfortable atmosphere of the room, soothed by the warmth and noise emanating from Celestia's softening belly.
Every so often a muffled burble or crunch could be heard, causing Celestia to laugh and Twi to blush a little. She loved the feeling of sinking into the Princess's churning abdomen, feeling it work hard on whoever was lucky enough to end up in that loving stomach, enjoying the feeling of the pony (or ponies!) inside digesting into mush and pure nutrients, then draining into her intestines to be worked on further.
 Her teacher knew she liked this part, that she enjoyed what was to come. Celestia occasionally chose to satisfy her, not too often as to spoil her but when the time was right...
 A soft "pffffrt" came from Celestia's rear, slightly moving her tail. Twilight's ears perked up as Celestia sighed and slowly stood, careful not to throw Twi off of her too quickly. She looked at her student with a surprisingly passive, almost solemn expression.
 "Soon, it will be time for me to let these two go, but they're special, and it would be a shame for you not to enjoy yourself with them.
 "Your friends Pinkie Pie and Fluttershy visited me, and requested... no, demanded, that they be next in helping power the sun.
Fluttershy seemed anxious at first but with some encouragement from Pinkie agreed. They were both delicious, and very filling company. I hope you aren't upset by this news, and fully understand if you don't want to continue." Celestia lied a little about their intentions to soften the blow.
 Rather than being saddened, a fire seemed to ignite in Twilight's deep eyes, taking a borderline ravenous expression.
"Oh that just makes it better!" She exclaimed, and so they began.
 --Not too soon after--
 Celestia moaned as Twi's tongue danced around her twitching anus. The experience was as much of a treat for her as it was for Twilight, and she was happy to show it.
Occasionally, the curious tongue would dart into its fleshy target and sample her warm depths for just a moment, teasing Celestia.
Twi pulled back slightly and traced the folds of her Princess's rear, from the base of the tail to below her hole, taking in the rich flavour of the route.
 She moved down and pushed her nose into the plothole, breathing the smell in deeply and burying her face in the cheeks. Twilight was in nirvana, barely able to comprehend what Celestia was asking.
 "You know this belly you're so obsessed with is full of your friends, right?"
 Twilight moaned a response, a barely coherent "Mhmhm~" and continued her conquest of everything ahead of her snout.
 Celestia continued.
 "And you're okay with them being nothing but mush in my bowels and fat on my ass?"
 Twilight paused for a moment and considered.
She quickly answered with
"Hmm... I like 'em better this way!" Before resuming as Celestia responded.
"Ha! You're a good student, Twilight"
 For a while, all that could be heard were the ever present bubbles and glurbles from the Princess's tum, and kisses, wet smacks and occasional murmurs from Twilight's work on her rear.
 Soon, Twi's tongue met visitors. Her friends had reached Celestia's rear after hours of caring digestion. She welcomed them. Firm waste ever so slowly filled the tight rectum, giving Twilight the reunion she deserved, and a taste of what was to come.
She tested the mass, probing and poking it, letting it cover her curious tongue. Celestia tensed, then spoke.
 "It seems like it's time for the next step in your lesson, and the next in theirs too!"
 
--Warning, heavy scat ahead!--
 Celestia gently pushed back and downwards, hinting at where she needed Twilight. Twi lay back, head propped up by one of her books, and longingly stared into the dark eye of muscle that held her friends inside, as though to will them outside through sheer intensity of gaze.
 "Are you sure you want this?" Celestia asked, making sure she knew her student's position. Twilight responded with a low noise the white Aliform interpreted as somewhere between "Yes" and "Definitely".
She let go.
 The dam burst, and the warm mud that was once two independent ponies lazily meandered from Celestia's hole, a thick snake of brown with the occasional fleck of white, pink or yellow like royal toothpaste.
 Twilight's heart fluttered. The short moment seeming to take forever in her head as she rushed through her thoughts at a full sprint.
"That's my friends?" "Why is this so hot?" And "I can't believe this is happening" all collided into each other like the thought equivalent of a demolition derby.
 The moon above her clenched and cut the flow abruptly, letting the firm banana-like log drop. Twi didn't realise her mouth was open until it hit her tongue, and she began to chew instinctively, eyes widening as she realised what she'd done, but not stopping either.
 The soft poo had a taste incomparable to any other; not terrible, but earthy, bitter and thick, taking work to get through quickly. The occasional harder bit swept past her taste buds, adding to the mix of the depraved meal. She swept her tongue through it, feeling the waste flow past, enjoying the texture more than she expected. She chewed for a while, enjoying the taboo lunch before swallowing the load, feeling it be massaged down her gullet and further beyond.
 Celestia hesitantly cut off the flow as quickly as it started, to give Twilight one final chance to back out. Instead of hearing a complaint, nothing but a wet chewing and the faint, pleased moaning of enjoyment filled the chamber, followed by a loud *glrrk* of a swallow.
Celestia turned her head and smiled at her now brown mouthed student.
 "I'm impressed and glad you like what I've done to those two, since I've got a *lot* more of them waiting for you." she punctuated the sentence with another, less petite fart than before.
 "It's fascinating to learn more about the Alicorn digestive process first hoof! There's so little bone left, you could barely tell-Mmmph!"
Twilight was interrupted by more hot shit, now coming faster than before. It filled her mouth mid sentence but she quickly got used to it, swallowing almost as fast as it came, only occasionally chewing the soft remains of two of her best friends. Her cheeks went crimson as she felt Celestia arch her back and push her soft, still full belly into her rapidly filling one.
 Celestia put aside her regality and lost herself in the fetishistic pleasure of evacuating herself directly into her student, pumping her full of her friends no less. She moaned softly without realising, blushing.
"Ohhh Pinkie... Fluttershhhh-" she pushed hard and the remains spurted out for a second, covering Twilight's nose and mouth before resuming their more consistent flow.
 Twi used her tongue to coax the poo into her half full maw, breaking the brown banana in half as she closed her mouth around it for a moment and savoured the experience; from the creamy filler, to the crunchy bone, even to what she could only assume was the colourful remains of Fluttershy's fur. Even the smell was intoxicating in some ways she knew she'd regret later.
As she swallowed, letting it join the rest in her now visibly expanded stomach, she realised she'd zoned out for a moment amidst her thoughts, and that the waste had covered her neck and around her head.
 She didn't care.
 Celestia crouched, practically sitting on top of Twilight's swelling stomach, and rythmicly moved up and down it, rubbing with her ever saggier stomach. Her flow slowed as she let Twilight get through her current helping of pony-pie, and she leaned her ass into Twilight's face, still slowly pushing the paste-like meal out.
Twi eagerly pushed her head into the now less-than-white cheeks coming down to meet her, smothering herself in both flesh and former flesh.
 Celestia was surprised to feel an eager tongue quickly delving back into her, even through the thick servings of dung, lapping it up and hunting for more as she gulped it down. Twilight was proving much more naughty than she expected, taking her hoofs-on lesson with unparalleled eagerness to please.
 Twilight found the experience borderline orgasmic. A small voice of reason in the back of her mind reminded her she was chowing down on what was left of two mares she'd loved, that she'd never see again.
That just drove her deeper. She loved the feeling of utter depravity that she got from every swallow, every bite into the soft muck practically pouring from Celestia. It was a statement of dedication that couldn't be matched.
Eventually, the tap ran dry, and Celestia panted, basking in the afterglow of everything that had just happened. Comforted by the balloon-like stomach of the smaller lavender unicorn below her, and the contented expression on her messy face, she smiled down at her. A few stained yellow feathers were left near her mouth which she gently lapped up and swallowed, before working through the last bits remaining stuck in her teeth or under her tongue. It was a noisily wet affair, which just proved to the princess how much Twilight had enjoyed herself.
 "You may have finished your lunch I so lovingly cooked, but you're doing the cleaning up!" Joked the Alicorn, presenting herself for Twilight's aching tongue to clean up.
 She finished the job diligently, then almost immediately fell asleep, still surrounded by a small mound of manure. After a moment gazing at the worn out pony, her horn glowed gold and Celestia curiously lifted a ball of waste from the pile, still showing some coloured remnants of what made it, and popped it in her mouth to try it, chewing tentatively and quickly swallowing.
 *Bleurgh, once through is enough, girls!* She thought. *How could Twi eat this?!*
 The end.