Courtney began pedalling at a slow pace, her cheeks steadily grinding up and down. They were gently pushing you against Courtney's anus, separated only by the thin sweat stained fabric of her shorts. There was a loud gurgling noise coming from within her, you knew what it meant, you were praying that she could just hold it in. But your prayers were ignored as Courtney let loose a massive blast of ass gas. It was long loud and wet, and you began to shrink the moment you breathed it in. The smell made you gag and you ended up only breathing it in more as you paniced. You were shrinking at a rapid pace and when it ended you were so small that the threads of her shorts were like a chain link fence to you, and on the other side was her reeking sphincter. If she kept farting then you would likely be doomed to shrink endlessly within Courtney's butthole.

         You were trying to think of a way out but your thoughts were interrupted by Courtney's voice as she whined, "Oh god, there's so much... I gotta hold it, Gabe will be back soon and the last thing I want to do is explain why the room smells so bad." You felt her anus rumble like an earthquake before she clenched it in an effort to contain her building gas. She picked up the pace, her enormous asscheeks were taking turns shoving you against her asshole. You struggled to try and scale up her panties but her cheeks knocked the wind out of you every quarter of a second, still you couldn't give up. "At least the itch is almost gone," Courtney said happily. She started peddling faster, her cheeks pulverizing your body into the sweaty anus on the other side of her panties. You let out a scream as you were being beaten by her asscheeks when she suddenly with let out a 30 second long, thundering, ungodly fart, into your open mouth. The taste was unbearable but even after you closed your mouth you could still taste it, the smell was like a Taco Bell dumpster and the force of her gas was comparable to a natural disaster. Your shrinking however was the worst part, the second that you tasted her gas you had blinked, when you opened your eyes you were just small enough to fit between the spandex threads of her shorts. You had your limbs outstretched to prevent you from going between the threads but the fart wasn't even a second in and you were still rapidly shrinking. By the end of her half minute apocalyptic gas blast you were standing on a single spandex thread that appeared to be as wide as a street. She picked up the pace again and her asscheeks began to shake her shorts at top speed. You managed to withstand the first five impacts but she was pedaling at top speed, it all happened in less than a second and her butthole was still closing but the sixth impact came and doomed you. The thread You were holding on to shook so violently that it threw You off and you landed inbetween two of the wrinkles of her sweaty sphincter just as they came together and sealed your fate. You now belonged to Courtney's massive farthole and she had no clue you were doomed to your stinky fate.

"Ooh gawd, that reeks," Courtney said as she continued pedalling. "I hope Gabe takes his time so that the smell goes away. Actually it has been awhile, I wonder if he ditched me? I could keep working out to put on a show when he arrives but as much as I wanted to show off my beautiful backside I think it would be best if I just went home, then I could let loose without embarrassing myself. I could even get another flatulent farthole destroyer from Taco Bell on the way, it was delicious after all and I doubt it can make things much worse."

         You began to panic after her last sentence, you had just been trapped in her city sized anus and if she kept farting it could easily become comparable to the size of the earth. She was trying to hold it in so you doubted that she was finished but if she had more of whatever gave her so much gas in the first place then you would probably end up being subatomic. This was your life now, trapped in the wrinkles of your hot friends anus, shrinking everytime the gassy giantess passed gas with no idea that you were there. Courtney came to a conclusion on what to do and said, "I guess I'll..."