KatannaUK by a longshot.
She mainly did pants pooping, and when she did use diapers she'd often put them on over her panties.
I really wish she'd stuck around long enough to actually use diapers properly, because not only did she have a gorgeous body, she actually had obscenely massive shits that would have pushed even high-grade ABDL diapers to their limit.
Nothing would have expanded my dong more than her having a total blowout in Goodnites and/or filling actual fetish diapers to the brim in the first place. Most women grunt and moan for 20 minutes just to push out a tiny little turd, then immediately take it off. Almost every time you find an image or video of a "woman" actually filling their diapers, it's actually a tranny trying to use weird angles to hide his unmistakably fridge-like man body.
Katanna would straight up explode in her pants and show off her wide, breedable thighs with her stained, filled-up leggings bulging in between.
Thing is, she got off on doing it in public and seemed to be a photography nerd, so she probably got spooked by the times she got noticed/close calls, and instead of continuing her messing escapades at home on video, called it quits because that didn't interest her.
What a shame. I've never seen a woman that even comes close without a massive enema or 20 minutes of drawn-out obnoxious """sexy""" """acting""" ):
I'd post images, but I'm on tor.