Treadmill

(chapter originally by Fly at writing.com)

The treadmills, specifically the ones right in front of the window! This was set up so people running had a view, but now anyone watching Isabel was getting the view now. Kelly hopped up on a treadmill with her friends joining her on the others around it, leaving the one in the middle of Kelly and Jim for Isabel!

"Alright, time for some intense cardio! We usually try to run for a while, hope you have the stamina, teehee!" Isabel's gaze was fixed forward outside, the gym was located on a small city block with several other businesses down it which all connected to the main street. Luckily, or as lucky as Isabel could ever be at this point, no one was walking down the sidewalks. She knew that could change depending on the time, though. Isabel decided she would dare to look back and found the entire gym of people looking back at her, most of which were staring at her nude ass. Kelly reached over and flipped the treadmill on without warning and Isabel stumbled forward before taking off into a jog!

"There she goes!!" Isabel heard someone shout, letting everyone know the naked girl had started running. Isabel **** her eyes forward, trying to focus on anything except the dozens and dozens of eyes now fixated on her butt. Her ass jiggled back and forth, each cheek jumping up and down as she moved her legs awkwardly as she still held her hands up to cover herself.

"Hey, Izzy was it? You can't run like that, watch me do it!" Jim motioned to his running form, swinging his body weight and arms with the way he moved. Isabel knew he was just trying to get her to really get her body moving. She glanced to Jim and then to Kelly, who gave her an expecting look as she reached over and pumped up the treadmill's speed.

"Whoa! Wait!" Isabel nearly fell as she sped her jog up into a brisk run, having to give up on cover in order to keep herself moving! New onlookers wandered over to watch a girl do her cardio work-out totally bare, goods out in the breeze of the AC. As far as most people were concerned, Isabel was just some strange woman shamelessly showing off her nudity at the public gym. She started to pant as she ran faster and faster, her big butt rippling and shaking with each pounding step. This also made her luscious thighs rub together and bounce in line with her butt. Anyone who got a side-boob look was also treated to her large cans bouncing and slapping together.

"Woooo! Work it, honey!!" A man began clapping and cheering and many others joined as they observed Isabel's pale ass quake. Several more jumped on the souvenir train and started creating cell phone evidence to show friends later.

"What is she thinking doing that naked!? I would just DIE if I were her!" A flabbergasted woman exclaimed, and another leaned in all the while never taking her eyes off Isabel's bouncing bum. "You think it's a dare?? Or maybe it's that body confidence stuff? I guess I'd be self-conscious about those stretch marks too..." The gossip got worse and worse as Isabel trudged on. She started to catch glimpses of Kelly and friends all laughing at her as they judged her body. Isabel was of course incredibly sexy, but everyone goes to the gym for a reason. The cheap lighting of course didn't help to hide any minute imperfection she had, but exacerbated it heavily. She looked back again as she ran full speed, now greeted with everyone laughing and pointing at her.

"Yo girl, you fine! Dat ass is too much, lemme take you out later!" A guy cat-called Isabel, who was speechless with embarrassment. A female voice roared out louder than him.

"Hey slut! Is this how you get your boyfriends?? I bring my kid brother here with me sometimes, you know! Keep this naked-whore crap to the club!" The angry chick threw a half empty water bottle at Isabel, which bounced off her head and made everyone laugh. Isabel shuddered as cold water spilled onto her ass and back, cooling her body hot from the run. She felt worse and worse as she was berated, and she already felt sick from having her nudes viral on the internet. This thought brought her to notice the three high school boys standing directly behind her, filming her workout. Or rather how her naked body was moving during it!

"H-Hey! Stop it!" Isabel sputtered out as she ran, but they all just look at each other and laughed to Isabel's chagrin.

"Haha, you serious? No way, you wanna work out nude then I'm gonna look all I want! And so is everyone on my stream!" One of the boys gave a thumbs up as he leered between Isabel's ass cheeks. "S-Stream?" The boy's eyes lit up.

"Oh yeah, lady! I usually stream my gym routine, but a naked chick on the treadmill is WAY WAY better than that! I'm gonna get so many new viewers after this!" Isabel swung her head away from him to hide her mortified look. Her nude gym day was being put up live on some schoolboy's page! That meant a lot of young men were getting a free butt-show. Looking away didn't help however, now that she was facing a street FILLED with people! Where did they all come from? She had only looked away for a moment. She stared at the shocked faces of a huge rush of random citizens like a deer in headlights, she could tell from the way men's heads were bobbing that there was a nice clear shot of her huge boobs flapping around with her piercing hard nips spinning.

"Uh oh, Izzy. There's a LOT of people out there! Can't stop now though, we aren't even half done! Haha, " Kelly laughed as she jogged at a comfortable speed, her and her friends modestly dressed in gym clothes contrasting the fully nude girl running her heart out. Isabel clamped her eyes shut when people outside started pointing and making an audible commotion, even through the glass of the window.

The laughter and rude comments continued throughout her butt naked cardio and after what seemed like an eternity of humiliation...