Runey
Looking at the files, perhaps I'm reading this wrong but maybe it'll help, but I notice the 3 new outfits don't have True statements like the older outfits do.
Below is specifically Maria's anal menu and you can see the 4 older outfits(nude, succubus, bunny, slut) have == True, where the 3 newer (goth, harem, lingerie) are simple if statements that end.
I don't know how to recompile / edit rpa files to test this myself. Pulling up a scene and selecting the "lingerie" outfit, using console, I can see both the harem outfit and lingerie outfit as True, not just one, but her Slut outfit is False (as it should be). I've attached a pic.
Hopefully I'm not barking up the wrong tree with this.
edit: her menu looks very similar to Kali's, so guessing that's not it. Leaving it up for now in case it does help.