Emerald was enjoying a lazy Sunday afternoon in her and Neo's apartment. She always loved these sorts of afternoons, as the dress code was dramatically relaxed, which definitely made her and her immense body much more comfortable. She wore an olive green t-shirt that had been turned into a crop top by Emerald's massive belly, which was smooth and round as it filled her lap and spilled over the sides and became more of an apron when she stood up. Her chunky arms spilled out of the short sleeves and jiggles like jelly when she moved them. She also wore a pair of plain white panties, but with her belly covering it from above and her wide hips, generous rear and ballooned rear swallowing and stretching them, it was almost impossible to see them. As Emerald filled the couch in the apartment, she heard Neo's heavy, lumbering footsteps in the hallway outside. She couldn't help but chuckle at the sound, as Neo was usually so nimble and quiet despite her size. As the door to the apartment opened, however, the Neo standing in the doorway was quiet different from the extra large lover that Emerald knew. The size was the most obvious difference, Neo being about the size she was a fair few years ago, but that wasn't all. Neo had swapped her namesake-matching hair for a plain black, which was tied in a loose ponytail, and she was considerably less well-dressed than usual, wearing a simple loose grey hoodie and dark jeans. She was carrying a canvas bag with an assorted array of healthy groceries. She still had the adorable face that Emerald loved, but that was all that she recognised.
"C'mon Neo, show me the real you," Emerald purred, a slightly lecherous grin on her chubby face as she beckoned Neo closer. Neo's characteristic smug grin slipped onto her face as she set the shopping down. She dropped the illusion on it, revealing the bag to be full of tubs of all sorts of ice cream flavours. She got nice and close to Emerald's face, lining her respectable chest up with it, and snapped her fingers. The illusion over her chest shattered like glass, revealing something more accurate. Instead of the hoodie, Neo now had a white cropped jacket, which stopped barely below her breasts. Those breasts were each the size of Neo's head, and they strained the buttons of her jacket while making Emerald's look tiny in comparison. They jutted out so far that they touched Emerald's nose. Neo then leant in all the way to bury Emerald's face in the deep, cavernous cleavage. Emerald hummed happily as the softness of Neo's breasts smothered her. She was tempted to reach up and have some more fun with them, but she didn't want to break the rest of Neo's illusion too quickly. She enjoyed the show too much for that. After a little bit of fun, Neo heaved her chest back, before leaning in to plant a little kiss on Emerald's plump lips.
"Mmm, that was fun, but I think you're missing something," Emerald teased. Neo was more than happy to keep going, as she stepped back to give Emerald a better view. With another snap of her fingers, the rest of the illusion on her body had changed. In place of her smooth and toned bare stomach was an illusion of a round belly that looked pillowy soft as was even bigger than Emerald's. Her hips and rear, which were not illusions, were almost as wide as the door she came in through, and a fair bit wider than Emerald's. They were crammed into a dangerously tight pair of distressed dark pants, with patches of pale, blubbery flesh peeking through. Emerald liked what she saw, but she knew it wasn't entirely accurate.
"Nice try Neo, but I know your belly isn't as big as mine," Emerald said smugly. Neo stuck her tongue out in light-hearted annoyance, before snapping her fingers again. The final illusion over her belly disappeared, and in its place was a more modest, but still very large, belly that hung over the waistband of her pants, which were undone. With her now unaltered figure, it was clearly more of a top-heavy hourglass figure, if someone had dramatically overfilled the hourglass. Neo then squeezed herself out of her tortuously tight pants, revealing a pair of white, pink and brown striped panties that were stretching to their limit over Neo's bountiful behind. Then, Neo stretched back and popped the buttons of her jacket, uncovering the multicoloured bra beneath it, with a white band and straps, one pink cup and one brown cup, both of which Neo's blooming breasts were spilling out of. Doing that stopped the concerning creaking noise that her buttons were making, and it gave her breasts more room, making them look a touch larger now that they were mostly free.
"Mmm, looking good," Emerald flirted. Neo then grabbed a tub for each of them out of the shopping bag, Emerald's being mint and chocolate chip ice cream, while Neo's was a strawberry ripple. "Aw, my favourite. Thanks babe," Emerald cheered. Neo quickly waddled over to the little kitchenette to grab big spoons for the couple, while Emerald enjoyed watching her wide rear wobble as she walked. When she returned and plopped down on the couch next to Emerald, the couple cracked into their tubs. It was safe to say that ice cream made up a very considerable portion of their regular diets, and it was probably a large contributor to their incredible sizes, both due to the sheer quantity of ice cream the girls put away and due to the fact that daily ice cream was hardly part of a healthy, balanced diet. As the girls ate, Neo snuggled in next to Emerald, resting her head on Emerald's soft arm, softer than any pillow Neo knew of. The two of them were most of the way through their fairly large tubs of ice cream when Emerald nudged Neo's soft side, making Neo eventually prop herself up.
"Ooh, Neo, I think something was in that ice cream," Emerald fake-groaned, playing it up for Neo. Emerald engaged her hallucination semblance, and Neo saw Emerald's belly grow. The large, chocolate-coloured mass appeared to expand at an incredible rate all by itself. It grew larger in every direction. It rose higher and higher, seeming to block Emerald's view forwards. It extended out further and further, spilling over Emerald's knees and drooping towards the ground. It grew wider and wider, seeming to demand more room as it edged towards Neo on one side and spilled over the arm of the couch on the other side. It looked so soft, so heavy, so real, but Neo knew that it unfortunately wasn't. Still, that didn't stop Neo from loving the view, even to the point where she was feeling very warm inside as she squirmed in her seat.
"Ooh, Neo, I'm so big, it's amazing," Emerald gasped, keeping up her overdramatic act. Neo stuck her arm out and waved her hand through the false image, feeling nothing but air as it looked to Neo like her hand was phasing through Emerald's gargantuan gut. "Ugh, Neo, how'd you know?" Emerald said, pretending to be exasperated. Neo let out a quiet giggle as she went back to snuggling up against Emerald, putting her head back on Emerald's pillowy arm. There was a moment of quiet as the girls went back to eating for a moment, before Emerald spoke again. "Hey, Neo, I kinda wish I actually was that big. Either that, or I wish I could use my semblance on more people. It'd be awesome, just waddling about, having everyone giving me a ton of room," Emerald thought out loud. Neo reached into her pants pockets and plucked out her scroll, typing up a quick message, which she showed to her girlfriend.
'Sounds hot,' the message read, stealing a quick laugh from Emerald's lips.
"Yeah, that too. I won't lie, I'm kinda jealous of your illusions, being able to fake being so big," Emerald admitted. Neo typed up another message on her scroll.
'Yeah, but your real bod's way hotter. I gotta get way bigger to be as sexy as you,' it said.
"Sounds like we've both got work to do. Can you pass me more ice cream, babe? I'm almost at 400, I wanna try break it before next weekend," Emerald requested. Neo was only more than happy to help Emerald out, as well as getting another tub for herself. After all, the immense illusionists had plenty to growth to go.
AN:
So... I might have forgotten to post this fic here. If you've been following me on DeviantArt, you've almost certainly already seen this, but this was a birthday present last year for a writer buddy of mine, HeavilyHandedWriter, who also writes this sort of thing. Definitely check him out over on DeviantArt, don't think he posts here.
Also, real talk, if you're into this sort of thing, you might be better off on DeviantArt. There's way more people writing this sort of thing for RWBY characters, along with other various fandoms. As weird as some of the fics on this site get, it's clear that weight gain isn't a super common kink or fetish. Heck, even AO3 has this place beat.
So, yeah.