The sweat soaked threads of Sunny's sweatpants held you in place as she jogged to the gym. Every step she took made her asscheecks grind together and smash against your tiny body. Every now and then you would hear a rumbling sound come from deep within her bowels. As sweat rolled down her cheeks it would effortlessly cover your entire body the next time they came together. It felt like an eternity had passed but you noticed that you were growing again, unfortunately your growth only made the sweaty fabric hold you tighter. Your prison was inescapable, unless you shrank down again. You didn't like it but you needed Sunny to fart again if you were ever going to be free of your sweat stained prison.
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Sunny jogged until she reached the gym, she walked through the doors, showed her membership card to the front desk and found a good place do her stretches. She bent over to touch her toes and just as her fingers touched her feet she let loose a long wett bassy blast. The fart went on for 15 seconds, was easily heard by the entire room, was powerful enough to shake her two large ass cheeks and smelled like a skunk had sprayed her. People turned and stared at her but she ignored them and happily continued stretching. She worked out at this gym all the time and sometimes farting was just inevitable, there was no reason for her to be self conscious about it now.
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As her fart went on you rapidly shrank, before you knew it you were already smaller than the gaps between the threads of her sweat pants. You tried to grab one of the threads but it continuesly grew out of your reach. You fell down towards her black thong, you landed on a single thread but the fart was still going on and violently shaking the threads of her thin black thong. It was too much, You couldn't hold on and you were easily tossed off the side falling towards her anus. You were now shrinking and falling, making her open asshole appear to be growing at an extremely rapid pace. It was like a gaping pit the size of a city, then a country, before long you were falling towards a planet sized butthole.
As you came closer and closer to her super sized sphincter Sunny's fart began to die off. Her anus started to close as you reached it's rim, the mountainous terrain of her asshole slammed into you as it went back into place. The rubbery landscape of Sunny's rim was covered in a thick slimy substance similar to the slime that coated Carmens butthole. The impact hurt immensely but the layer of oily slime absorbed most of the impact. For the second time today you were stuck to a giant goo covered wrinkle of a girls anus.
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Sunny finished stretching and looked around the gym. She could start on the Excersise bike like she normally did but the only free one was right next to the heater so she would be sweating like mad. She could start with yoga but she was still building up gas from lunch and would probably release a fart with every pose. She didn't mind farting at the gym but if she farted nonstop her clothes would be stained with the scent of her gas and she would have to smell the reeking scent of her gas all day. Alternatively she could hold in her gas if she did some deadlifts but would probably end up letting it all out if she broke concentration. She could also use the thigh machine but it always had a way of giving her a huge wedgie.
Sunny didn't know that you were plastered to a wrinkle of her butthole or anything else about your predicament, and neither of you had any way of knowing that her choice here would change the rules and limits of your shrinking. Maybe you'll shrink when you come in contact with her sweat, maybe every single fart would shrink you to your limit, maybe it would remove the limit entirely or maybe you will only be able to grow back to a maximum of an inch tall. Whatever her choice was could change everything about how your power worked and you would have to relearn how it worked. So with neither of you knowing of the possible repercussions of her decision, Sunny decided to...
