As Mira walked around the gym, she pointed out some of the machines you had questions about, and gave you a rundown of all the gym rules. Between explaining some of the more advanced machines and directing your attention to the various rooms (yoga room, tanning room, dance practice room, wrestling room…), Mira asked you all sorts of questions about your size, some of which were kind of embarrassing. “Has anyone ever sat on you?”
You blushed and replied, “Yeah, a lot actually.”
Mira cooed, “Aww, I’m so sorry! Does it hurt?”
You blushed again, and stammered, “Uh, well… It depends. If I’m under or between the girl’s buttcrack, it’s usually not so bad, but if I’m right beneath their cheek then it can be excruciating. Of course, the size of the ass has a lot to do with that too…”
Mira giggles and brings you around behind her back, so you are looking straight at her huge butt, “Do you think my ass would hurt?” You turn red as she jiggles her butt a little bit inside her tight pink pants, and she laughed again as you open and close your mouth wordlessly, trying to think of what to say. “Oh I’m just kidding, Tim! I wouldn’t sit on you.” She brings you back in front of her face, and says sweetly, “I think you’re too cute to sit on, hee hee!” and she gives you a little wink.
As Mira is about to show you the indoor rock climbing wall they have, she notices a woman on an exercise bike who is grumbling at the electronic dashboard in front of her. The woman smacked it once, and then got off the bike to tinker with the power cord that ran from the bike to the power outlet on the mirrored wall in front of it. The girl had long black hair, and was wearing a white tank top that ended above her belly button and tight black booty shorts that barely covered her gargantuan bubble butt. Mira walked over and said, “Excuse me miss, do you need any help?” The girl was twiddling with the power cord, and she didn’t look up when she responded, “Yeah, the dashboard won’t turn on and the bike is stuck on a really hard setting. I think the cord is broken or something.” Mira smiled and said, “You know, I have to go check in with my boss real quick, but how about I have one of my new assistants give you a hand? Just a sec.”
Mira set you down on the seat of the bike and whispered to you, “Alright Tim, see if you can help this girl and I’ll be back in a few minutes. I just want to let Joye how things are going!” You smiled and said, “Sure thing!” and Mira turned to walk away. You admired her figure as she walked away, when you noticed a shadow fall over you. You looked to the side to notice that the raven haired girl from before was already remounting the bike, and swinging her right leg over top of you to reach the other pedal. She stood there for a second, with her ass hovering above you. “Where the hell is that assistant?” the girl mused. You were about to call out to her when her ass plummeted to the seat, and you were knocked onto your back directly beneath her ass crack. The butt cheeks at your sides jiggled a bit from the impact. Thankfully, you could see a sliver of light from the buttcrack above you, which meant that you were near the back of the woman’s ass crack, and your head wasn’t entirely covered.
The seat you were on was like a normal bike seat except it had a small backing, which cupped the rider’s buttocks. The girl on top of you was seated a bit forward, so there was still space behind her ass that you could see. Just as you realized you might have a chance of escape, the girl slid her ass backwards, grinding you against the leather pad as her ass dragged you with it. Suddenly the light above you vanished as the girl’s ass hit the cup in the seat, and your head was squished between her butt cheeks as she pushed on the bike pedals, squashing her ass cheeks together against the seat. You realized what she meant when she said the bike was stuck on a hard difficulty; with every slow rotation of the bike’s pedals, you could feel yourself getting ground beneath each of her butt cheeks. Occasionally, the girl would pull forward, letting her butt cheeks separate ever so slightly and letting you see up through her butt crack, right before her ass was mashed back into the firm chair and your face was smothered with her flesh. The thin black pants she was wearing did little to keep you from feeling the immense warmth or sleight sweat of the girl.
After a few minutes, she stood up, and got off the bike. You, unfortunately, went up with her, as your body was wedged slightly between her huge butt cheeks. You felt the entire front side of your body being clenched by this girl’s firm and squishy butt cheeks, but you could tell that you weren’t all the way between her cheeks. Your back was still visible to the outside world. The girl bent down to look at the power cord again, and you could feel her buttocks separating slightly, but it still wasn’t enough for you to fall free. You wondered when Mira was coming back, since she was practically your only hope at this point.
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