No pun intended - this is not Dirty Harry - actually I forgot the name of the character I reckon would be the one to say this. He also asks questions and he very well knows that the ... person who has to answer will not feel lucky ... though he knows he will feel something, if he does not answer honest (and right).
That said, we get to a family and they are quite dysfunctional - or whatever you would call it. The acting is not the best, there is some very obvious implications (no brownie points for guessing certain things right - dynamic and ... let's call it "relationships") ... you can not be too sensitive about things. And you may find it hard to root for a certain ... guy (again no pun intended) ... but even if certain things are questionable ... they may feel justified! Of course only in movies - as in do not try this at home. This is ... escapism (well not literally, although maybe that too at one point or another) ...