| 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
Mother: Everybody was in such a hurry to bury him. I said not to plant it yet. [To Keller] I told you to…! (1.272)
Kate blames Joe for accepting Larry's death too soon – and perhaps for the romance unfolding between Chris and Ann that she's anxious to prevent.
| Quote #3
Mother: You above all have got to believe, you…
Kate doesn't say much, but she says it clearly enough for Joe to understand. He above all has to believe that Larry is still alive, because if Larry is dead, then Joe killed him.