When bending down, her pants ride down her butt showing slight buttcrack...

(This chapter written by "throwaway4sure")

Isabel bends over into forward fold, looking around uncomfortably as her unfamiliarity with yoga makes her painfully aware the she is sticking her ass out in the air. She is sure everyone can see her panty lines through her tight spandex pants as she folds herself forward. Looking around, Isabel tried to reassure herself. Everyone else is bending over, just like Isabel. They are all too focused on their yoga to care about her ass, right?

Isbabel bends even further forward, cupping her elbows in her palms like the instructor interacts. As Isabel bends forward, she focuses on her breathing, on the peaceful atmosphere in the room, on the cool air flowing across her body, here arms, her face, her ass.... Her ass?

Eyes widening, Isabel's face reddens as she realizes that her pants slipped down as she bent forward, exposing some of her butt crack for any one to see if they looked up from their forward fold. Should Isabel fix her pants? She'd only draw attention to the situation, right? Everyone's already looking down for the forward fold, and Isabel can just fix her pants when she straightens back up from the pose. Right now, she should just focus on breathing and listening to what the instructor has to say.

Behind Isabel, Mindy glances up to make sure she's still posing the same way as the instructor. She's halfway to adjusting her pose when she notices the pale, round cleavage of Isabel's ass peeking out from black spandex.

Mindy's heart races in a familiar way. She'd already been kicked out of three gyms, and didn't want to get kicked out again, but how could she pass up this? A prank handed to her on a silver platter. A crescent moon ready to shine it's light on the world, if you will.