Also, of course K'naugh knew to put on a front for his parents. He was all manners to the adults around him. Some parents feel their socially advantaged child couldn't possibly be up to no good because only poor kids do that sort of thing. Firmly believe that the ills of society - of which their sons raping girls falls under - happens not in their social circle but, again, with poor kids.
Also believe you can't rape someone in a lower social class because, obviously (to them) - she/he - the victim - was either asking for it, expecting a payday, or simply don't matter as a person.
Had one such entitled asshole tell me that incest only happens to poor people. He was another believer in the ills of society only impacting the lower classes. This asshole is the product of old money, old name in one state marrying into another old money, old name family in another state. Buildings and museums named after both sides in both states.
As a white, well connected male, he believes he has the right to rule, to control, and to lord it over.
If his daughters were to be raped, he'd first consider who did the raping to determine how to act. I'm serious - it would depend on where the guilty came from for him. What social class and how connected they were - wouldn't want to make a scene and all that. Not that his daughters would ever be raped - to his mind - they come from a good family and those things simply don't happen to good girls from good families.
If his sons were to rape someone - it would be an all out attack on the victim.