Molly placed her bag in a locker in the locker room and peeked her head around the corner to make sure no one else was in the changing room with her. She pulled her phone out and decided to film a quick video for the channel while she was here. She began filming herself, addressing her still growing audience.

“Heyyyy everyone, Ruby here. Mom said I had to bring small fry with me to the gym because he’s been looking extra scrawny lately. Anyone want to guess where he is?” She proceeded to bring the camera around to her back and pull open the back of her shorts again. She had to reach in between her cheeks in order to grab Aiden by his head so that she could bring him into frame.

“Say hi doofus! Are you having fun? Do you like being in sissy’s big butt? Oh just wait until it gets all sweaty back there!” She taunted. Aiden looked up and saw the camera, and after hearing her taunts he realized that she was filming a video for the channel. He was accustomed to this process enough that he immediately began waving his arms and pleading for Ruby to remove him from her booty, despite the fact that he very much enjoyed being trapped in her ass.

“Please, please let me go! Ruby PLEASE!!!!” He screamed, not even sure if his voice would register on the video, but it couldn’t hurt to try.

“Maybe later dork. Have fun in my ass!” She cooed, placing a finger on top of his head and forcing him back into the depths of her asscrack. Molly allowed her shorts to close once more and quickly tried to expel some gas from her colon before shutting off the video. She strained herself, feeling a bubble on the cusp of her anus. However, when the fart finally emerged, Molly was horrified by the loud, squelching sound that accompanied its release. She immediately wanted to reach in and at least check on Aiden to make sure that she didn’t just full on shit her pants. But before she did that, she remembered the video she was filming and decided to capitalize on the situation.

“Ooooh, that sounded wet.” She said sadistically, smacking one hand on her ass cheek. “Sucks to be you, loser.” Molly then shut off the video and retreated into the restroom area and dug a hand down into her shorts. She once again pinched Aiden by the head and pulled him out of her shorts, feeling a trail of gooey wetness as he was pulled out of her cheeks. Molly raised Aiden up in front of the bathroom mirror and began inspecting him. Disgustingly, he was coated, head to toe in a slimy brown filth.

“Shit. Sorry bud.” Was all she said, as she began to reach for the faucet to try and rinse him off. However, much to her surprise, Aiden lost his temper.

“What the fuck is your problem? Jesus Christ, do you not understand boundaries? Fucking hell you’re disgusting!” He screamed, trying to wipe the foul substance from his face. In that moment, Molly lost every ounce of regard that she had for Aiden’s feelings as she contemplated the best way to remind him of the power dynamic in their relationship.

“Oh? Boundaries? You think that was crossing the line? I’ll show you how to cross a fucking line.” She spit, carrying her tiny prey into one of the stalls. 

Aiden was quickly beginning to panic as Molly walked into a stall. Initially he was enjoying himself in his gigantic roommate’s asscrack, but as soon as her sphincter released a small swimming pool’s worth of liquid shit and anal goop, he immediately began retching. The heinous stench and taste of the vile fluid was so overpowering that it surpassed his desire to be humiliated by the beautiful woman. Now he was desperately wishing that he hadn’t lost his cool with someone who could literally bury him alive in excrement.

Molly shut the stall door and pulled her shorts down before slamming her ass down on the toilet. She gave Aiden a cruel smile before scrunching her face and letting out a labored grunt. A loud cascade of splashing could be heard as the giantess forced out everything that was trapped within her. She then held Aiden aloft over the gap between her legs, threatening to drop him into the filthy swamp below.

“Molly please. I’m sorry!” He screamed.

“I’m gonna make sure you never, ever forget your fucking place.” She spit, unrolling a few squares of toilet paper that she used to bunch up around Aiden’s body. He tried to squirm out of her grasp, but as she proceeded, Aiden found himself being held directly beneath Molly’s filthy asshole and above the disgusting water below. 

“Please no…” But the giantess was no longer listening as she pressed his tiny body into her filthy sphincter and began using him to wipe her ass. Molly reveled in the feeling of absolute, unquestionable power that she was now wielding over Aiden. She initially began tormenting Aiden with her ass because she knew he was okay with it, but now… just knowing how horrible it was and knowing that he couldn’t do anything to stop her, Molly was in ecstasy. She made several slow passes along her asshole before she realized that Aiden’s body wasn’t going to be able to fully clean her filth while he was covered in it. She carefully removed him from the destroyed paper and wrapped him in a clean sheet. 

Once she was finished, Molly stood up and brought Aiden to the sink to wash him off. She tore off his doll clothes and tossed them in the trash before scrubbing his body with hand soap. As the giantess scrubbed his tiny body, she cracked a wicked smile when she found that his cock was still rock hard.

“Oh, you’re a REAL fucking degenerate aren’t you?” She asked, bringing his tiny body back around to her ample rear. Aiden remained quiet as he couldn’t hide his shame from this veritable goddess. Molly smushed his tiny body back against her anus, the fresh stink of shit still overwhelming his senses.

“Oh we’re gonna have to find something that you don’t like.” She said to herself as she left the locker room and entered the gym floor. Molly scanned the large fitness facility as her mind began putting together a truly devastating plan for the pathetic little insect currently thrust against her back door. Her eyes darted over to the cycling machines. She figured it couldn’t hurt to get some sweat building up while she figured out how to really bring Aiden into line.