Rei's Roadtrip by omanahan88

Rated: 🟡 - Sexual Themes
Word Count: 3577 | Views: 24 | Reviews: 0
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Added: 03/17/2025
Updated: 04/05/2025

YAAAAAAWWWWWWWNNNNNN


Owen stretched his arms lazily as he slowly roused from a good night’s sleep. He smiled, enjoying the warm glow of the Saturday morning sunshine signaling the start to what was promising to be a wonderfully relaxing day. Blinking several times, Owne raised his hands to his eyes, rubbing them to wipe away the last hazy remnants of sleepiness. 


“Mmmmmmmm… Wha…. what the fuck?” Owen looked around the room, confused by the idea of not waking up in the same place that he had gone to sleep. All around him, massive white mountains formed a deep caudron around him. “Where the hell am I? Hello? Can anybody…. No… no no no no!” 


Panic started to set in as the pieces fell into place in Owen’s mind after turning around to find a gargantuan pillow lying behind him. It wasn’t that Owen had been removed from his room in the middle of the night, in fact the truth was infinitely more sinister than that; he wasn’t lost, he was shrunk. Spinning on his heels, Owen turned his eyes towards the sky, searching for his cruel, demon of a step-sister, the one who had been frequently shrinking and tormenting him since they were kids. However, much to his surprise, he didn’t find a pair of massive feet looming above, ready to stomp him into dust.


“R-Rei? Rei?” Owen called out. It wasn’t clear what she was up to yet, but he could be certain that the pink haired monster was behind this. 


“Surprise!” Emerging over the rolling hills of his bunched up bed sheets, Rei’s titanic head rose into view like the morning sun, beaming down upon her tiny brother with a wide, toothy grin. Owen stared nervously up at the giantess, nervously awaiting whatever torments she intended to inflict upon him today. However, Rei simply continued to look at him for several long wordless seconds until finally her face contorted into an annoyed frown. “Well, don’t you have something to say?”


“Wha… What the hell are you doing in my house?!” Owen stammered. They had both wound up going to different colleges and Owen moved about ten hours from where he grew up after he graduated, largely to put some distance between himself and his terrorist of a little sister. But that wasn’t to say that he never saw her anymore. Since he couldn’t just completely isolate himself from his parents and the rest of his family, he still had to make a trip home for the occasional holiday or big event. And this meant that Owen would spend the odd Fourth of July plastered to her grimy armpits or endure Christmas Day from inside her gigantic nostril. 


Rei furrowed her brow at Owen’s disappointing response. A mighty earthquake shook the bed as the pink haired titaness began to shift around, plucking her shrunken brother up between two fingers. The wind was forced from Owen’s chest as he was hastily brought up before her pillowy lips. As the giantess began to speak, her warm breath rolled out in a dense fog, filling Owen’s nostrils with the minty smell of her mouthwash.


“No… you’re supposed to wish me a happy birthday. What kind of brother doesn’t wish his baby sister a happy birthday?” She firmly squeezed Owen’s shrunken, rubbery body, eliciting a pained wheeze from the micro man. 


“Your birthday is in two weeks!” Owen shouted back, confused by what was turning out to be the strangest home invasion of all time. Rei smirked as she smacked her lips, tauntingly opening her mouth as if to simply toss her helpless brother inside. However, instead of popping him onto her slimy tongue, Rei simply let out a satisfied giggle and dropped him back onto the bed. Owen landed with a hushed thump, getting lost in several folds of soft cotton sheets as his tremendous step-sister’s voice echoed around him.


“Yeah, but my birthday party is tonight.” Rei said, slowly climbing off of the bed and pulling Owen’s phone from the bedside table. “And since you didn’t get me a present, I decided that you could buy the tickets to the Sabrina concert tonight.”


“Buy you a present, I didn’t even know you were having a party. How the hell was I…” Once Owen finally emerged from the cocoon of twisted fabric, he was faced with a horrifying sight. Looming before him, Rei’s massive butt, clad in overly colorful, scrunched up booty shorts, was poised to drop onto him like a meteor. Just above her perky round cheeks, Rei held Owen’s phone against the small of her back, gently shaking it as she looked back over her shoulder.


“I just need your pin so I can log in and get the tickets.” Her voice sounded deceptively sweet, despite the fact that she was actively extorting him with threats of humiliating buttcrushing. “And before you keep complaining, you should know… I’m feeling a bit bloated today.”


Owen hung his head. Her threat was perfectly clear, and they both knew full well that it wasn’t a bluff on her part. “Goddammit. How much are the tickets?” 


“All in, it’s gonna run you about fifteen hundred bucks.” 


“FIFTEEN HUNDRED DOLLARS?! FOR ONE FUCKING TICKET?” Owen felt his heart beginning to race. Was it worth it? Would he willingly subject himself to Rei’s heinous, skin melting farts for fifteen hundred dollars? In all honesty, based on his many previous encounters with his giantess sister’s greasy asshole, it was a little bit of a toss up.


“No, it’s not just one ticket. You didn’t think I was going to a concert alone did you?” She scoffed. “Now seriously, hurry up. Because I can feel a big one coming and I need to know whether or not it’s going down your throat.” 


“Godfuckingdammit. Six nine six nine.” Owen finally relented, causing Rei to snort out a delighted laugh. 


“Sixty nine sixty nine? You’re such a loser.” Rei chuckled as she walked away from the bed, removing the looming threat of her bubbly ass for the time being as she unlocked the phone and began typing away. Owen felt a pit form in his stomach, leaving him feeling completely nauseous. Fifteen hundred dollars was a huge chunk of his savings and to just throw it away on his brat sister and her friends? God it felt so fucking awful. 


“Aaaaaaand done! There, see… painless!” Rei said with a giggle, showing the receipt on the phone to her tiny brother. While wallowing in self pity, Owen was suddenly overcome with relief as he began to rapidly grow larger in size. She was unshrinking him? She only wanted his money, not to terrorize him? Was this truly the step-sibling that he knew and feared? 


“Alright, time to get packed. Put together a bag and let’s get going. We need to be on the road like… soon.” Rei said gently tossing the phone back onto the bed. 


“Packed? For what?” Owen was genuinely confused, grateful to be finally large enough to not get squashed by his phone being thrown back to him. Now reaching two feet tall and still growing inch by inch, Owen hopped off of his bed, still dwarfed in size by his massive sister. 


“Well the concert’s in LA tonight, so we’ve gotta get going like ASAP. So get a move on, Mr. Chauffeur.” She smirked playfully as it finally became clear to Owen what else was being expected of him. Of course she was going to make him drive her to fucking California. And was she expecting him to actually attend a concert with her? Was one of those tickets for him? He didn’t even like live music!


“Los Angeles? That’s like a seven hour drive.” He complained, rising to find his gaze level with the giantess crotch when suddenly his ascent came to an unexpected and unsettling pause. 


“Yeah, so you better get a goddamn move on before you make us late.” She sneered, reaching out to ruffle Owen’s hair with one hand. Then, without warning, Rei squeezed her fingers together, grabbing a large tuft of hair as she executed a rapid quarter turn, pulling Owen’s tiny head forward so that his face was nestled firmly in between her soft glutes. 


Ppppppffffttttttttt


A cacophony of raucous laughter and desperate coughing echoed out of the room and into the rest of the apartment. Rei released her grip on her half-pint brother’s head, allowing him to fall to his hands and knees as he desperately tried to expunge the sour, rotten gas out of his respiratory system. 


“Alright, quit screwing around. Pack your bag, I’m gonna raid your fridge. Meet me by the front door in ten minutes or I’m gonna make you flea sized and put you inside my asshole.” Rei was already strutting out of the room, seeking to find something to steal from the kitchen. Owen wanted to stay here and continue to scrub the disgusting scent of sewer gas from his mouth, but as much as he needed to recover from what had just happened, he was not willing to risk being late and invoking the threat that his sister had just made. 


“Fuck fuck fuck fuck!” Owen began scrambling, trying to put together a bag of clothes and toiletries, everything he might need for a coerced overnight stay out of town. Quietly muttering and cursing under his breath, Owen stumbled out of his bedroom roughly seven minutes later, nearly tripping over himself as he rushed into the living room to find his annoying little sister contentedly sitting on his couch, chowing down on what looked like the remnants of the pulled pork sandwich he had brought home from a potluck he had attended with work friends last night. 


“Mmmm Mmmm Mmmmmm.” Rei exaggeratedly licked her fingers, carelessly tossing the plate down on the couch as she looked up and regarded her frazzled looking brother. “Ready to go?” She asked, somewhat rhetorically as she stood up and started towards the door. Owen felt completely emasculated as Rei ushered him out of his own house, choosing to lock the door herself as she pushed him outside and pulled the door closed behind her. 


“Hey, where are you going?” Rei asked as Owen dragged his bag over to his little gray sedan. He paused for a moment, confused as he turned to find Rei sauntering across his front lawn towards her own, powder blue punch buggy that was parked out on the street. 


“Oh come on…” Owen sighed, exasperated by the continuing sequence of slights that his bossy little sister continued to inflict upon him. He threw his head back and let out a tired groan before turning on his heels and dragging his duffel over to the small, adorable looking car. 


“I’ll take that, go ahead and hop in!” Rei giggled excitedly as she took Owen’s bag from him and walked towards the back of the car. Knowing that he never really had any options when it came to obeying his sister, Owen pulled open the door and clambered into the driver’s seat. He spent a few minutes trying to adjust the seat, making it so that his chest wasn’t pressing so firmly into the steering wheel the whole time. In the midst of this process, Owen happened to look over to find a large pink suitcase sitting on the passenger seat, causing him to peer into the back seat where he found even more luggage cluttering up the whole interior of the car. 


“Where the hell is she going to…” The realization hit the frazzled young man too late, as he slowly turned to find Rei standing beside him, grinning wickedly as she blocked his only way out of the vehicle. “Rei… no.” He muttered, already feeling the familiar tingling sensation that preceded his rapid reduction in size. 


“Sorry little bro, but there’s just not enough room in the car. You understand, don’t you?” She asked rhetorically, watching with glee as he shrunk back down. 


“No, come on! Please! Rei, we can just take my car!” Owen pleaded, already his legs were short enough that the soles of his feet were no longer dangling over the edge of the seat. The titanic, pink haired woman simply shrugged her shoulders and shook her head, waiting until she felt that Owen’s presence would no longer obstruct her from getting in the seat before she slid her body into the vehicle. Owen watched with tears welling up in his eyes as his gigantic sister positioned her massive rear end above him. Slowly her massive, round cheeks descended towards him, expertly guiding his tiny body towards the crack of her ass where the fabric of her tight fitting shorts seemed to collect. 


“What the fuck… did you mess with my seat settings?” Rei asked rhetorically, annoyed as she firmly ground her butt into the seat. Owen felt the whole world shift around him as he was jostled back and forth within the dark, humid crevices of Rei’s hellish ass crack. Overwhelming heat and unbearable pressure wracked his body as the mind-altering stench radiating out of her asshole assaulted his senses. Owen could taste the familiar scent of the fart from earlier this morning sitting heavily on his tongue as he was forced to draw breath from the well of Rei’s sweaty booty. While the scent might not have been as potent as when she had just released the rancid, stinking miasma into his face, the sheer scale at which he was left to experience her entire ass made it comparably agonizing for the shrunken man. 


“Alright, time to go. You’ve already slowed us down too much.” Rei commented, putting the vehicle in gear and flexing her glutes together. From beneath her, Owen continued to plead for mercy, trying to argue that a seven hour car trip would be at least marginally better than riding without conversation. However, a large gurgle from her tummy and a searing hot blast of rancid, vomit inducing flatulence was the only response that he received in turn. It seemed that after a few years of fairly minimal contact with his demonic little sister, he had forgotten the lengths that she would go to just to make him suffer. After all, this was the same woman who in high school had shrunk both Owen as well as her own best friend Mandy simply because Owen had worked up the gall to ask Mandy to prom. So if Rei had permanently destroyed that relationship with a best friend of nine years just to put the both of them in the back of her thong to attend the dance, then it wasn’t a far stretch to think she would pass up on a bit of tepid conversation for the opportunity to rip endless, surprisingly rancid farts on his tiny body.


Four hundred miles, two meal stops, four pee breaks and literally three hundred and sixteen point blank farts later (Owen had resorted to counting them in a fruitless attempt to distract his mind from the tongue shriveling stink) and finally the pair arrived in southern California. Rei threw open the car door, stepping out into the warm summer air in the bustling parking of the SoFi Stadium in Los Angeles. She breathed deeply of the smell of weed, cheap beer and otherwise repugnant odors that this city had to offer. Rei flexed her cheeks, having had enough practice butt torturing her shrunken bro to know that after a car ride that long and sweaty, there was no way that he wasn’t adhered to the interior of her swampy crack. 


“Jeesh, this city fucking reeks. You should be thanking me.” Rei commented sarcastically, squeezing out one more quick, loud fart for her brother to sniff while she dug out her bag of concert clothing. Slipping into an adorable, tea green babydoll dress, Rei was able to covertly slip off her t-shirt from under the cover of the dress before reaching down to begin shimmying out of her stuffy, battered booty shorts. With the retrieval of the grievously harassed fabric from amidst her firm wedgie, Rei also catapulted her tiny brother out of her crack, allowing him to drop painfully to the ground between her feet. 


“Oh my god, is that him?” A strange voice coaxed Owen to roll over and scrabble to his feet, now faced with three additional titans, all staring down at him with wicked grins on their faces. 


“OHMYGOD HEY!” Rei said loudly, nearly crushing Owne beneath her sneaker as she turned to face her friends. She looked down at you as she took a seat on the open trunk of the car, removing a pair of black ankle boots from within. “Yeah that’s little Owen. Tiny body, even tinier cock.” She said playfully, knocking the small man down onto the filthy asphalt of the parking lot with her foot before prying both feet out of her well worn sneakers. 


As the miniature man slowly climbed to his feet, the top of his head bumped into Rei’s horrendously sweaty big toe. As he looked up to see what the obstruction was, he accidentally caught a big whiff of her pungent foot stink, causing him to reel backwards in shock. However, before he could back away properly, Rei’s foot lunged forward, gripping his face between two toes and scrunching them around his head, enabling her to laboriously pick him up using her foot before finally, after a full minute of forced sniffing, picking him up in her hand. 


“Just give us another minute. Gotta get the little guy big again so that we can get the tickets. Thanks again to the world’s best big brother.” Rei placed a great deal of emphasis on those last three words, smirking as she tossed Owen up into the air and unshrinking him so that by the time that he landed flat on his face on the dirty ground again, he was back to his typical 5’10” frame.


“Oh my god.”


“Amazing, I love it!”


“He fucking stinks.”


“And he looks like shit too.”


Owen tried to ignore their comments as he climbed to his feet, but as much as he hated them for saying it, for condoning his sister’s treatment of him, they were actually right. How could they expect him to attend a concert in this state? Rei at the very least owed him a shower if she wanted him to go inside. 


“Gimme your phone, dummy.” Rei said, sticking out her hand. Owen removed the device from his pocket and handed it over, knowing the consequences for refusing and not really seeing any reason to at this point. 


“Rei, they’re not going to let me past security looking and smelling like this. You’ve gotta let me at least take a shower.” He pleaded. But his pink haired sister just looked back at him with a confused look. 


“I mean, I think they’d have more of a problem with you not having a ticket over smelling like an outhouse.” She remarked, completely glossing over the fact that he only smelled like her outhouse.


“Wha-what do you mean? You bought tickets this morning.”


“Yeah, I bought four. For me and my friends.” Rei said with a smirk. Owen was dumbstruck? Why the fuck did she drag him out here if all she wanted was his fucking money?


“WHY?! Why did you bring me all the way out here if you weren’t going to have me go inside? “


Rei grinned a wicked grin as she set Owen’s phone down beside her. 


“Oh, Owey, sweetie.” She cooed, taking him by the hand. “I didn’t say you weren’t coming inside. I said you don’t have a ticket. I’m just gonna have to sneak you inside.” The cute, innocent looking devil woman tightened her grip around his hands, keeping him in place as Owen felt himself begin to shrink again. 


No…NO WAIT! Rei please, don’t. I’ll stay in the car, I’ll go wait in the hotel room. I’ll carry everyone’s bags to their rooms… please just no more shrinking!” Owen cried, pulling desperately against her grip but failing to free himself in any significant way. He heard the other girls laughing at him, but it didn’t matter. He would beg, he would degrade himself in any way if it would buy him mercy from his evil sister. But Rei simply smiled and shook her head. 


“But I don’t want my big bro to miss out on my birthday party! And besides, I need you with me. What if there’s an emergency? Like… what if one of the stalls is out of toilet paper…” Rei grinned wickedly as she collected Owen’s once again miniscule body in her hand before hovering him over the open mouth of her leather ankle boot. She dropped the tiny man inside, tilting it around until she was certain that he was stuck down in the toe section. Without any further discussion on the matter, Rei began to stuff her already sweaty, clammy foot inside of the boot, not stopping until she felt her tiny brother slide into place beneath her toes. 


“Alright, you girls ready?” Rei asked, standing up off of the trunk and stomping her foot on the ground a few times for good measure. 


“Kinda wish I had someone like that to play with..” One of the other girls commented, causing the others to echo in agreement. Rei looked around, quickly noticing a group of four other women who were loudly laughing and singing as they made their way through the maze of parked cars. 


“Why don’t we stock up then before we go in.” Rei said, striding confidently across the aisle as the group of four unfortunate women all began to gasp in disbelief and confusion while they quickly shrank down to insect size. 


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