I am no fan of Kanye and I do think he's an unstable and likely abusive person.
That being said I also think it's possible Bianca has some kind of objectification/exhibitionist kink and that she agrees to wear this stuff and get caught giving her husband a blowjob in public because she enjoys the humiliation.
Kim was married to Kanye for years and always wore what she wanted. Which was revealing yes but very different from this level of shock factor. Which makes me think that Bianca is into this kind of thing.
Edit: from reading some responses it seems Kanye did try to control Kim’s clothes so it’s definitely possible that he could be doing the same to Bianca. But I also don’t think that we should assume she’s a helpless victim simply because she wears revealing clothing.