I have just completed the novel and while I have a few questions, one pops into mind:

Why was it speculated by Tom and Michael that Vito held Fredo in disfavor because of "the old sandwich job", while he did not really appear that upset at Sonny regarding his affair with Lucy?

"The Don was straitlaced about sex. He would consider such cavorting by his son Freddie, two girls at a time, as degeneracy. Allowing himself to be physically humiliated by a man like Moe Greene would decrease respect for the Corleone family".

Was he more upset at Fredo because he let Moe Greene publicly slap him around?

Also, in the movie, when Vito is talking to Johnny Fontaine in the beginning he asks him if he spends time with his family. After JF says "yes", Sonny walks in (after his scene with Lucy against the door), Vito looks at him and says "Good, because a man who doesn't spend time with his family can never be a real man".

Sonny has no reaction to this, so I was wondering if he purposely said that as an indirect *hint* to Sonny, or was I just reading too much into that?

SK