Take the damn undies off! (weird bug...help)

[BornSlippy]

Hi. So I just started playing Sims 4 again with a fresh mod folder. I downloaded all the usual mods and some CC. For some reason my female sims won't show as nude in CAS. They show a bra and pants when I click the x, but not the default ones as far as I'm aware. During sex in WW, removing bottoms still shows the underwear (also they are always pink) though the top is removed. I don't have this issue when using DD or when sims bathe or are naked any other way. I'm sure this is something really obvious but I'm not that techy when it comes to this kind of thing. So basically I want nude in CAS and WW. Any ideas? Thanks!