As far as I know that's supposed to be a "bra" part of the clothes in this scene. So it renders even when clothes are disabled? That's weird, but maybe there's a broken condition at work. I know that MBM have tons of such cases but it's hardly noticeable unless you know where to look exactly. I also kinda hate clothes code setup, so I always switch them off automatically when slaves are pregnant to avoid sprite clipping, that's the worst part.
Anyway, I'll see what I can do about it when I'd get to this part, thanks for report.
Honestly, I don’t know if this is a bra or not. Clothes appear in any case, and in different variations.