Even if the game would deliver on it´s promises, the son path is turbo meh. You are playing a psychopath in the making, that is quite clear from early on. The Dad path is a lot better. While he made serious mistakes, he is aware and tries to rectify them, something you cannot say of the Mom and the son.If you use the son character.
Also, there is no sex with the mom or the sister characters.
No wonder that one day the daughter who tried to keep some semblance of peace in the family blows up at the two. Daddy´s girl finally telling them where to shove it. It becomes also glaringly obvious during the game that only the Dad and daughter have real feelings for the other.
DF had serious potential, but that got totally kicked to the curb because gumdrop became obsessed with making LSD-trip simulators like all of his newer games.