Watching my stepsister, Ava, rip major ass was an experience I never thought I'd have. She was always private about her bathroom habits and I never imagined she'd be the type to let one rip in front of me. But here we were, in her parents' guest bedroom where she was staying during her visit from college.
I was supposed to be at work already, but I overslept and had to use the bathroom before leaving. Unfortunately, Ava beat me to it. I heard the bathroom door lock behind her and knew I was trapped. I couldn't just barge in on her while she's using the toilet, so I stood outside the door, listening intently.
Ava started farting almost immediately. One after another, they echoed through the closed door, rattling the doorknob. The sound of relief in her moans was unmistakable. It was clear that she didn't care who could hear her ripping ass.
I leaned in closer, unable to tear my eyes away from the tiny gap between the bottom of the door and the floor. Through it, I could see the top of her leggings move up and down with each forceful expulsion of air from her tight ass.
After a few minutes, she pulled her leggings down and revealed her plump, rounded ass cheeks. She lifted her shirt slightly, revealing a thick wedgie that pushed her soft, round belly outwards. With both hands, she began to massage her ass cheeks and fart again, letting out a long, low moan of pleasure.
I was mesmerized by the sight of her big butt and round belly jiggling in front of me. The smell of her farts wafted through the crack in the door, making my stomach churn with excitement. It was intoxicating.
Ava must have forgotten about me because she sat on her phone for a few minutes, continuing to fart and scroll through her social media. I remained hidden, watching in awe as she made the room reek with the stench of her farts.
Suddenly, she stood up abruptly and flushed the toilet. I held my breath, bracing myself for the sound of the toilet exploding from all of her gas. But when she opened the bathroom door, she didn't notice me until I spoke.
"What are you doing in here?" she asked, clearly annoyed.
"I-I'm sorry, Ava," I stuttered. "I overslept and couldn't get out."
She rolled her eyes and pushed past me, heading for the kitchen. I could hear her muttering under her breath about how disgusting I was for watching her like that. But as she left, I couldn't help but feel a sense of accomplishment. I had seen something truly special, something that few people ever get to witness: my stepsister, Ava, ripping major ass.
