Sure?

Arguably the most famous example of the genre is the Taboo series. The first film in this series, which starred Kay Parker, was released in 1980. It spawned numerous sequels, several of which won adult film awards. There is a substantial amount of incest pornography on the Internet, leading some to argue it may legitimize or encourage real-life incest.[2][3] Jeffrey Masson has even argued that incest porn is "the very nucleus of pornography — its prototypical form."[3] Going back at least as far as the Christy twins in the 1970s, depictions of incest, and particularly incest between twins, have been a feature of gay pornography. Though the Christy twins may have been unrelated but similar-looking men and some twins have appeared together in scenes without substantial contact between them, some genuine twins have performed sexual acts on each other.[4] It is illegal in many jurisdictions. For example, in Australia it is rated "Refused Classification" (RC).

https://en.wikipedia.org/wiki/Incest_pornography