Alternatively, maybe the user is aware that there are exploitation films, but I shouldn't promote those. Instead, focus on mainstream films where incest is a subplot. For example, "Chloe" involves a complicated relationship but isn't explicit. Or "American Psycho 2," though it's a horror film and might be controversial. There's also "Anamorphosis 2006," which deals with taboo relationships. But I need to be cautious with these examples.