Kim and an exercise bike
Tiny Life Guard
chapter 21
by
CrankoWanko
Kim strolled over to an exercise bicycle, and set you down on the seat. “Alright Jim, let’s see how well you do with this test.” Kim put one foot on the left pedal, and then swung her other leg over the seat and stood on the right pedal. She grabbed the handles, and you considered jumping off the seat, but realized that not only would you get in trouble, you would be quickly caught by Kim. Kim’s massive butt cheeks, with a red thong pulled between them, hover a few feet above you for a second. “Good luck, Jim!” Kim calls over her shoulder before giggling to herself.
Suddenly, her legs bend and her ass swings straight down on top of you. You were standing right in the center of the seat, and as her butt fell, you went right between her butt cheeks. As her ass cheeks impacted the seat, they flattened and spread outwards. You, sadly, were caught between the two cheeks as they spread and were smashed between them. They felt very soft, but the tremendous force made you ache, and you couldn’t move as your arms were pinned at your sides.
Her ass bounced back up a bit, giving you some range of motion and relieving you for a moment from the immense pressure from both sides, but then her hips settled on the bike seat and her ass spread out again. You weren’t completely mashed between her cheeks, it was actually quite enjoyable. You tried to wriggle free, or at least away from the center of her cheeks, but you only managed to orient yourself with your arms spread to your sides, along Kim’s right ass cheek, before Kim said “Let’s try something easy to start off with.”
She dialed in a low resistance onto the bike’s dashboard, and then started pedaling. Kim’s firm butt tensed up, and her cheeks pushed together just a bit, enough to form a tight fit around you. As she got the bike “up to speed,” her ass cheeks started sliding back and forth a bit. Each time her feet completed a revolution on the pedals, her ass cheek would rub against your face, stop, then rub the other way. You were far from being crushed, but you were unable to move as Kim carelessly rode away. After a few minutes, Kim said “Well, you’re doing pretty good so far. Lets make it tougher, hmm?” She pushed a few buttons on the bike’s control panel, and suddenly her legs almost stopped.
In an instant, she stood up a bit as she began pushing as hard as she could against the bike pedals. The two firm walls of flesh that had been slightly pinning you were now clamping down on you. Your face was forced against her ass as her muscles tensed. Her hips lifted off the seat, letting your feet dangle, but her buttocks clenched fiercely, gripping you more than firmly enough to lift you off the seat with her. Each time she turned the pedal her ass cheeks would rub against each other, grinding you between them. The friction was making it warm for you. Her butt cheeks were squeezing so powerfully together that you were completely immobile, and her skin was enveloping you on all sides.
What next?
Suddenly, her legs bend and her ass swings straight down on top of you. You were standing right in the center of the seat, and as her butt fell, you went right between her butt cheeks. As her ass cheeks impacted the seat, they flattened and spread outwards. You, sadly, were caught between the two cheeks as they spread and were smashed between them. They felt very soft, but the tremendous force made you ache, and you couldn’t move as your arms were pinned at your sides.
Her ass bounced back up a bit, giving you some range of motion and relieving you for a moment from the immense pressure from both sides, but then her hips settled on the bike seat and her ass spread out again. You weren’t completely mashed between her cheeks, it was actually quite enjoyable. You tried to wriggle free, or at least away from the center of her cheeks, but you only managed to orient yourself with your arms spread to your sides, along Kim’s right ass cheek, before Kim said “Let’s try something easy to start off with.”
She dialed in a low resistance onto the bike’s dashboard, and then started pedaling. Kim’s firm butt tensed up, and her cheeks pushed together just a bit, enough to form a tight fit around you. As she got the bike “up to speed,” her ass cheeks started sliding back and forth a bit. Each time her feet completed a revolution on the pedals, her ass cheek would rub against your face, stop, then rub the other way. You were far from being crushed, but you were unable to move as Kim carelessly rode away. After a few minutes, Kim said “Well, you’re doing pretty good so far. Lets make it tougher, hmm?” She pushed a few buttons on the bike’s control panel, and suddenly her legs almost stopped.
In an instant, she stood up a bit as she began pushing as hard as she could against the bike pedals. The two firm walls of flesh that had been slightly pinning you were now clamping down on you. Your face was forced against her ass as her muscles tensed. Her hips lifted off the seat, letting your feet dangle, but her buttocks clenched fiercely, gripping you more than firmly enough to lift you off the seat with her. Each time she turned the pedal her ass cheeks would rub against each other, grinding you between them. The friction was making it warm for you. Her butt cheeks were squeezing so powerfully together that you were completely immobile, and her skin was enveloping you on all sides.
What next?
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May 30, 2025
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