Quote 1
Keller: She thinks he's coming back, Chris. You marry that girl and you're pronouncing him dead. Now what's going to happen to Mother. Do you know? I don't. (1.208)
Joe needs Kate's support. In his effort to sustain a delicate situation, Joe tries to guilt Chris into protecting his mother.
Quote 2
Keller: It's crazy, but it comes to my mind. She don't hold nothin' against me, does she? (1.573)
With George calling from the prison where his father is held, Joe gets paranoid. Perhaps Ann has come to trap him too? A guilty conscience starts to dampen his good mood.
Quote 3
Keller: That's the way they do, George. A little man makes a mistake and they hang him by the thumbs; the big ones become ambassadors. (2.411)
Joe tries to deflect George's anger and blame by sympathizing with Steve.