What Rudi said next even made us sense the impending crisis.
How a bad person has been eyeing Rudi and the family (us).
How that bad person might cause all sorts of misfortune on the family (us).
How because of that, Rudi might start doing many things that look very strange to us.
Honestly speaking, I'm worried that he's over thinking it, but Rudi seems to have some definite proof. He must have thought about the situation before talking to us, about what he can say, about what he can't.
Even though some of this doesn't make sense, but it'll be too late once something happens. I can understand Rudi's thought process here.