The incest angle...(spoiler)
As was mentioned somewhere on here, in the movie Damian gave off an extremely unsettling, sexual vibe toward Audrina, and there was a somewhat returned sexual vibe by Vera when she leaned provocatively over him at the table and intensely kissed his cheek. Also, her line to Audrina about "what that man is capable of," etc.
Now for the book fans, we know "what he was capable of" was more about the lies and manipulations. There was never even a hint of incest on Damian's part. But in the movie, it almost was plausible until the big secret came out that both Audrina and Vera were sexual abuse victims of Damian.
So, do you think that was deliberate in the "movie twist" sense, or did that come about naturally that once the book was adapted to a movie script, that undertone surfaced on its own?