Back in the girl's bathroom...
Caren was caught off-guard, for a moment she wasn't even convinced that what was happening right now was real because this was the very first time in her life that she'd been refused entry. She may not be certain on several things but one she was on was that somehow, Lillian or at least her body rejected her pretty hard, puzzling her though she was also amused with the newfound challenge. She still basked in the lingering warmth and stench of Lillian's fart as it carried her away through the air, drifting like a miniature leaf that had been blown away.
'Finally' Lillian sighed in relief, that persistent ticklish itch was finally gone, though it felt like it had almost slipped inside her butt. She still couldn't figure out what it could've possibly been but she felt that she shot it out of her crack with that last fart, a pretty huge one even by her own standards but there was something more to it... even she wasn't completely sure how but she felt that her panties' fabric tore.
"Huh?" She raised an eyebrow and decided to enter one of the stalls, just in case although she doubted anyone would dare enter knowing she was practically exploding with gas. She quickly unbuttoned her jean shorts and pulled them down, stepping out of the piece of cloth and setting it on top of the toilet's tank. Just as quickly she took her makeshift thong off and raised it to her face's level, feeling an additional wave of stink hit her, the strained fabric had definitely absorbed quite a lot of her repeated explosive emissions in spite of its small size.
There it was, small but not enough to escape her sight, a very tiny hole that definitely hadn't been there before when she put them on that morning. Lillian couldn't help but chuckle in mild amazement at her own prowess.
'Heh, all those jokes about me farting holes into my underwear finally came true' She thought and then recalled the feeling in her butt. It wasn't entirely unpleasant but there was something about the way that it tried to force its way inside stirred her gut and made the already large volume of gas in her gut erupt most violently.
Lillian patted her gut, which was now looking a lot more deflated, back to its usual pudgy self. She smiled and quickly put her underwear and shorts back on. She hadn't even looked at the time but she figured that it wasn't too long before the school's 2nd meal was served, 3rd for the early birds.* Her friends always got to their cafeteria spot before then and today in particular she was even more interested as she'd already set her sights on a certain unsuspecting Lillie guy of mixed heritage.
Just then, another bassy trombone-sque blast escaped from her prodigiously-sized derriere and reminded her that she still had some more "venting" to do.
'Better empty the tank first, don't wanna have a close call like Jen did' She thought, giggling at the memory of that earlier moment, if it hadn't been for Jim's swift acting and quick thinking her bestie would've embarrassed herself pretty badly in front of you. As hilarious as that was, Lillian liked playing fair and she wouldn't have wanted to take advantage of such a thing in her pursuit for her crush's feelings. Plus, it'd be enormously hypocritical of herself, the one girl who actually aspired to become the school's so-called Farting Queen, still unable to defeat the current holder of that title...
As for Caren, she'd been farted out so many times while shrunken to the size of a Lillie that by now she pretty much mastered gliding along the air currents, seamlessly flying out through the doorknob without Lillian suspecting a thing. She was still in cloud 9, surprised beyond measure that she found a girl that might be about as gassy as herself. Ironically, she was now feeling a slight craving for a Lillie to drop into her own crack and 'shower' him with her powerful gas just as the chubby Brazilian beauty had inadvertently done to her.
Ever since she was aware of her thoughts she knew that she was different from everyone else around her, that she had something special to herself, something not even her mom and sister knew about: the ability to change the size of anything and anyone. However, she ended up getting caught amidst some shrunken mischief and got the attention of the Church, the first time she got actual confirmation from anyone that her unique skills were indeed a gift and while the Church itself couldn't possibly stop her antics without devoting an unreasonable amount of resources and manpower they reached a compromise, allowing her to work for them as a part-time nun so she could continue her studies and to be kept under watch albeit far more loosely than they'd like.
Under the tutelage of the Church and with many other gifted people in its ranks, Caren was not only able to get a better grasp on her abilities but further expanded on their usage, finding that with enough creativity, she could do almost anything. By rapidly shrinking and unshrinking the space around her, she could essentially teleport to places or move extremely fast. Doing something similar to the air around her enabled her to float or even fly in mid-air. Some of her tests required "volunteers" and afterwards she'd shrink their very memories of such events, reducing them to an insignificant blip in their minds. Not a perfect solution but a very functional one, serving basically as memory wiping.
Upon hearing that the Gulliver High school opened up a position for a nurse to work at their in-campus chapel she (figuratively) moved land and sea to make sure she'd be given that spot. After all, why would she need to shrink anyone if she could find herself a Lillie boy attracted enough to her bodacious curves? Not that she was opposed to girls. Plus, she could shrink herself to the size of a Lillie and pose as one if need be.
Getting back to the real world, she subconsciously maneuvered herself and was now en route to the school's infirmary. Not that she was feeling sick in spite of the tons of reeking, borderline toxic gas she huffed but because she was paying a visit to one of her favorite people in the world: her little sister Altina, whose massive booty was always sure to deliver. Using her size manipulation abilities, she flew towards her and saw that she was bent over, looking for something on the floor. Caren paused and wondered what it was, all while she ogled to that giant, wobbling bottom bounce from side to side. Her own was larger but she suspected that Altina's was the fattier one, there was a certain extra bit of gelatinousness to the way those cheeks jiggled.
Caren had to do a fair bit of walking around every day, meaning that her bottom was likely a tad firmer and springier though it was still massive and squishy and soft. Only real booty connoisseurs, if there were any besides herself, would appreciate the differences between the sisters.
"Where did that Lillie girl go?" Altina sighed but she persevered, she wasn't about to give up on a patient, let alone on her first day of this school year. She wished Chrissy weren't so stubborn but she knew most Lillies tended to be that way.
'Hmm? A Lillie girl?' Caren thought, her curiosity piqued 'Knowing lil sis, that girl has a 75% chance of being lost in that big ass' She chuckled quietly and with that, she flew towards the back of Altina's scrubs, which were riding down, revealing a bit of her crack.
'I think Dolores' meals are taking effect after all' Caren smiled, seeing that Altina's pants were struggling to contain her ample bottom. Without any further ado, she flew straight into her crack and then deactivated her "flight", taking a proper dive down the canyon-esque crevice.
Unlike every other Lillie in this situation, who would be scared out of their minds, Caren simply enjoyed the dive itself to the fullest. She might be a bit of an adrenaline junkie but outside of her ventures with big, jiggling behinds it wasn't like she showed any particular interest in extreme sports. She briefly wondered if maybe she should've been some sort of professional daredevil instead of a nun, trying to picture that life and giggling at the irony.
Moments later, her fall was stopped by Altina's enormous cheeks and immediately hugged one of them, burying her face a little, enjoying the feel of the squishy, doughy mass enveloping her. She could smell in the air the lingering remnants of her previous bouts of gas and that only served to give her confirmation that Altina hadn't been refusing Dolores' generous helpings of food.
"What the fuck?" Hearing another voice, a female at that, snapped Caren out of her thoughts and got her to turn her head in the direction of said voice. There she saw her, a typical Lillie girl given her very slender constitution. She looked very disheveled and covered in sweat, as well as giving off the same smell as Altina's farts. Indeed, Chrissy was beyond baffled when she saw another girl seemingly fall out of the sky at random and then go and hug Altina's fat cheek, snuggling it like she was actually enjoying being there.
"Oh? I was half-expecting a Lillie guy sneaking in to cop a feel" Caren giggled.
"But then again I heard my lil sis say something about a missing Lillie girl"
"Wait, WHAT?!" Chrissy's eyes widened and one of them began twitching from sheer disbelief mixed in with seething rage at this girl's sheer nonchalance "What do you mean little sister?!"
"Yeah, this big booty here is my lil sister's. And speaking of sisters, Sister Caren Laitinen, pleased to make your acquaintance" The nun cheerfully offered her hand for a friendly handshake but despite acting oblivious, she had sensed clear as crystal that this girl was not as innocent as she may have first thought, her burning hatred was extremely self evident.
What happens next?