Intrafamilial relations is a controversial subject, but art doesn't exist to cater to our sense of decency or wholesomeness. Incest, being a great taboo, has been taken on by many directors and writers, in order to shock audiences and ask serious questions about the nature of familial and sexual depictions in movies run a wide gamut, but they always ask audiences to Incest - be it between siblings, cousins, step-family members, or parents with sons and daughters - is one of those icky subject matters we just can't help but be fascinated by. And it's been portrayed in films more than a few times. If you're curious, here are some of the most memorable examples of incestuous relationships in movies.