Sisterly Gains

by Archy

Rating: mature
Tags: Anthro, Slice of Life, My Little Pony: Friendship is Magic, Princess Luna, Fetish, Princess Celestia
Length: 2737

An already rather fat Luna wishes for more, Celestia is happy to oblige.

Luna had been gaining weight for months now, unaware it was her sister who was causing her to gain more and more on purpose. But the princess was enjoying it, perhaps a little too much. A bed breaking experience really brings her exorbitant eating to her attention. Now she wants more...

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Cover art by Lupin Quill.

Published 2018-07-25 20:20:01 UTC
Last updated 2018-07-25 20:20:01 UTC

Sisterly Gains

CRUNCH!

There was a horrible noise as the bed gave way, Luna’s utterly immense frame crashing through splintered wood as the slats trying to support her weight finally gave up the ghost. Her fall of less than a few feet was cushioned by her blubber, all six hundred pounds of it that jiggled around as the sudden shock of the fall against her body had thrown it almost in a spasm. She groaned, at least the bed had lasted through the day. Celestia, already waiting for her sister to wake up was sitting at a small dressing table adjusting her crown. The bed giving up had easily caught her attention however, wandering over to Luna who was still lying in the destroyed remains.

“S-sister?”

“Yes Luna, what is it?”

“C-can you pass me an eclair? That was quite the fall.”

Celestia was getting used to the requests by now for more food. It had almost seemed a little too easy. The sun was just starting to set and Luna had just awoken from her slumber as she always did around this time, admittedly with the bed giving way it was not by her own volition. In the last six months or so Luna had been plied by Celestia with little treats as she awoke, sweet things she had the chefs in the castle put together.

Initially Luna had refused, but Celestia knew she had a weakness for sweet things. When small but manageable slices of cake had started to appear, she had taken a few nibbles on the first few days trying to be subtle and restrain herself, but then the whole slices had vanished. Eventually she was able to move her off cake and onto other treats. However it didn’t go amiss to offer her some cake here and there and give her something she really enjoyed, although judging by her size it was clear she was keen on all of it, in one way or another.

Celestia watched as Luna just opened her maw and with her tongue lolling out slightly, scarfed the eclair down in a few mere seconds, her lips getting covered in the rich filling that spurted out the end as she greedily chewed on it. A satisfied “Urrraaapppp!” left her mouth as her body digested the calorie rich dessert. She licked her lips, trying her best to get the glaze and filling that peppered her mouth, eventually using a fattened hand to scoop it inside.

“Celestia?”

“Yes? What is it? You want another eclair?” the princess asked. She could see Luna searching her body with her eyes, it seemed impossible to think she hadn’t realised what a massive piggy she had become, her ginormous and overbearing weight had crushed the bed and her size as hundreds of pounds of flab oozed over the remains couldn’t have been a bigger giveaway. Celestia was expecting a small freak out, the realisation of her gaining perhaps now becoming apparent.

Instead, her younger sister just relaxed, her face going into a rather sweet smile as she took both her fat arms and tucked them under her gut, grinning at her size. She looked at Celestia, Celestia raising an eyebrow back at her.

“I...want more. This is heaven. T-the size, the squish. I love all of it.” she emphasized her enjoyment of the whole situation by using her buried blubbery hands to give her fat belly a small jiggle, blushing heavily as the huge amount of fat almost danced around in front of hers and Celestia’s eyes. She swore she heard a small moan of pleasure emanate from her sisters lips.

“In fact I um…” she struggled to get the words out nearly, her eyes were looking past Celestia to a small tray of more treats her sister always kept nearby just in case she wanted more than the one. “I want to be bigger, this feels so amazing as it is I can’t imagine what it would feel like being even huger, fatter...lardier.” she blushed, seeing Celestia lower her raised eyebrow and just smile back. Celestia could never have imagined that she would embrace it as she had, it was unlike Luna to indulge but she had been indulging for a little while now and was clearly enjoying it.

“Well I think I can help with that.” Celestia teased her a little, that was always fun to see Luna get an answer from her she wasn’t expecting, although it seemed a little naive of her not to realise Celestia had been doing this to her on purpose. No matter, the princess walked out the door, returning but a few moments later followed by a number of staff pushing trays of varying sizes that were parked all around the massive bedroom. Celestia lifted a silver tray lid, underneath was a small pile of the treats that Luna seemed to love oh so much. Her eyes went wide again, Celestia knew she had her.

“I think this is enough for starters.” her older sister giggled and rested herself on the edge of Luna’s lardy belly. It seemed the fun was just about to begin.

“For start...mfffff!” she would have replied, but a slice of blueberry pie muffled her voice. Celestia’s horn glowed as she started to levitate food towards her sister, not even giving her moment for pause as she began to stuff her like she had been dreaming about for months. Now the cat was out of the bag about how Luna felt about all this she had no qualms in holding herself back now the perfect opportunity had arisen to fill her with food.

“You’re big, sister, but you can always be bigger.” Celestia cooed in her ear as she just lay back and let her magic do all the hard work. It was wonderful magic, leaving her hands free to just lay on and toy with her blubbery plaything, a plaything that was chomping and chewing rather quickly through all the treats she was getting to eat. Pies, cakes, donuts. All manner of sweet treats were vanishing inside her and every one was adding to her frame.

“I-I’m such a fatass…” she groaned, able to get a short sentence out before Celestia assaulted her with another round of food, her greedy lips lapping up all that she could. Her sister just smiled and kept up the constant stream of food that was making its way to hear almost effortlessly.

“Well I think we could fill that plush rear of yours out a little too.” her sister teased her some more, watching as Luna continued to gain with the food she was eating. She must have gained easily another hundred or so pounds already, fattening up nicely.

“And more, perhaps...no tis’ silly.” she started to say but stopped herself. The eyebrow on Celestia’s face went up again.

“What’s silly? Luna this is rather silly already, I don’t think a little more will hurt.” she said. Luna listened to her sisters words, they made sense. It was rare that they didn’t.

“Well what if I… What if I was so fat I couldn’t even move? That I was such a lardy fatass that I was immobile? Ahaha…” her voice trailed off as she tried to turn the words to a nervous laugh but failed. Nothing got past Celestia.

“Easy to arrange, just stay still. Not that you’re going anywhere.” Celestia simply replied, her horn glowing again as she started to levitate food towards the fattening blue blob that occupied much of the now destroyed bed she was sat on. Even that was becoming a struggle, just sitting upright.

The food was starting to get to her, although huge and bloated, her body was struggling keeping everything down. The greedy princess was starting to let things slip.

“Uuurrrrppppp!”

“BWAAARRRPPPP!”

“My my, we must teach you some manners.” Celestia grinned as she moved another lot of food towards Luna who quickly and easily let it go down. She was eating so much and so fast now she was mostly reduced to single word responses.

“More…”

“Demanding too! Well I think you’re going to get your just desserts for that comment.” Celestia laughed a little and started on the ice cream. She observed as Luna was moving her arms while she still could all over her folds, caressing them and playing with the copious mounds of fat that covered her whole body.

“Rubs…”

Another demand, but Celestia was happy to oblige with that one, it didn’t take much to keep her magic feeding the blubbery Luna and to put her hands to good use, she was so big it was easy to get almost her entire arms length between folds and grab handfuls of fatty flesh that spilled into her palms. It felt great, amazing actually to just get a grip on it all. If it felt amazing to touch, she had no idea how it must feel to be that big, the actually be in Luna’s position right now. No wonder she wanted an almost never ending amount of food until she was so big she couldn’t even move.

The gaining was slow, Celestia didn’t mind staying awake to look after Luna and pamper her a bit. She even managed to use her magic to lower the sun and raise the moon whilst Luna simply forgot her duties in the ecstasy of fat she was experiencing. As mountains of food were chewed up the princess got fatter and fatter. Her whole body now easily covering what was left of the bed and then even more.

Gloorrrrpppp!

Her belly was getting a little vocal about all the food it was having to digest, but it was dealing with it well. Every treat added more pounds, more jello-like flesh that was gropable in every oh so divine way. Her stomach pushed out in front of her like a tide of fat that was searching for more space to expand into. Her ass was immense, if she had been wearing any clothing it would have suffered long ago and succumbed to the two wrecking ball orbs that were also increasing hugely in size with every passing minute. Her fat breasts sat atop her chest like two proud over inflated beach balls that wobbled with the rest of her body.

“URRAAPPPPPP!!!!”

Luna let go another huge belch, signifying her delight at the gaining she was doing. She rested her bingo wings to her side, now too fat to even grope her own body she was struggling to keep everything in check. Even though the bed had been destroyed earlier there was still some life in it, some of the wooden slats and other parts still remained intact, but not for long.

Luna lay back, staying upright was too much hard work. There was no way she could keep herself from relaxing like a total slob, besides lying on her back being fed sounded even better.

CRACK!

As she went backwards to lay herself flat, the headboard was caught by her sloshing belly that wobbled backwards with the maneuver. Her fat stomach shifted so much that it cracked it completely in two. Celestia just laughed, glad she was at the lower end and not tangled up in the carnage. She was sure Luna was blushing but, her head had vanished behind her belly.

“You really are a big piggy. What do piggies do?” she teased, holding the food back slightly until she got a reply.

“...oink.” it was quiet, but it was there. The flow of food continued.

“If you want more, keep it up. That’s a good piggie, keep oinking for your sister and you’ll get more treats.” Celestia almost teasing her as she shifted her positions slightly be more central on Luna’s huge gut that wobbled and swayed beneath her. She had a cute little idea, pulling a small card pig nose that could be attached to Luna’s face, if she were willing. “Put this on and the little fat piggy can have alllll the food she wants.” she giggled with glee, watching her sister pout in return.

She took it though, using her own magic to levitate the string around her head and then the little nose nestled on top of hers. She made sure it was tight. Celestia levitated more food towards her maw.

“That’s it you big fat piggy, eat your fill. Stuff your face until you can eat no more. I want the biggest piggie in the castle, yes I do. And you want it too.” she cooed, groping a few handfuls of that blubbery flesh that was absolutely divine to lie on, like a huge soft mattress that almost seemed to bounce underneath her with every little movement Celestia made or Luna made as she shifted her weight around. “C’mon, give your sister a few more oinks.”

“Oink...oink!” the last one more enthusiastic, clearly Luna wanted more food.

“Ohhh, an excited piggy! The big fat piggy gets their reward, yes they do.” Celestia cooed as she pushed even more treats into Luna’s waiting maw, the little nose trying its best to stay attached to Luna’s face as she ate even more food. “My goodness, a piggie so big she’s become the bed.” Celestia giggled, stretching her arms wide and hugging that absolutely massive gut as best she could. She felt it squish beneath her, her arms were stretched wide but she couldn’t encompass it all. There was just so much blubber. It was soft, warm, like putty in her hands. Her magic intensified a little as the thoughts of making Luna the biggest pig in the whole world started to grip her mind, just a bit more than was probably safe.

Underneath her, Luna just happily ate whatever she was given as Celestia kept her big piggie sister fed, her gut sloshing, blorping above Luna. The giant blue mare could feel her sister leaning against her gut, it churned slightly with the weight as it tried to process the food.

“BUURRRAAAPPPPPP!!!”

The mare let out a huge belch, blushing after the deed was done. It just made Celestia smile, taking a more serious tone to her words.

“My my sister, I knew you were taking this seriously to gain but I didn’t think you’d attain the mannerisms of a pig too. You really are a farmyard animal. That’s not the first belch tonight either.” she cooed. “Now give you sister a few more oinks before this is over, I want to hear you really demand those last bits of food.”

“Oink...oink…” the noise carried on, so it was only fair to let the food keep flowing until it ran out. Soon the trays were empty and Luna had entered the four figure mark for her weight. But she had done it, totally immobile.

The feeling of being completely immobile, trapped in her own blubber prison was not was she was expecting. It was, comforting somehow. That massive body around her almost felt like somepony had taken a huge, hefty blanket and wrapped it around her. Her body felt even more soft and more plush than anything she had felt before in her life.

Her hands had bloated out so much she wasn’t even able to close them, they were encased in a huge portion of fat that locked them where they were, she could just about wiggle them if she tried hard but the effort of doing so wasn’t worth it. Not that she needed them, Celestia seemed content to feed her as much as she could.

Even her toes were now encased in blubber, wiggling them a little but that was all she could manage. Her whole body was like a giant prison of warmth and satisfaction. From what she could feel, from her stomach churning to process all the food to her fat rippling in delight it was pure enjoyment. She just wanted to keep eating and growing forever, even if she had to put up with Celestia’s little request of being a piggy for her. At least so far it was just the little cardboard nose. She wondered if she wanted more, internally giggling at the thought of Celestia trying to put a little curly tail on her and maybe ears too.

Luckily there was someone who would keep feeding her, until she was lost in a sea of fat that would cover everything.

It was heaven, she couldn’t wait.