Also notice that in the film and the novel, Tom never refers to Vito as "Pop," "Godfather" or "Don Corleone." In fact, he never uses any form of address.
Turnbull, you're a good man. But Tom does refer to Vito as Pop after they all leave his bedroom after telling him the heartbreaking news that Mike killed Sollozzo; Sonny's wants to go after that pimp Tattaglia and Tom counters with "let the smoke clear, Pop can negotiate."
Also note that Tom tells Sonny to make the deal "if your father dies" followed by Sonny's exclamation "he's not your father." Tom does refer to Vito as the old man and to Woltz Tom refers to Vito as Mr. Corleone.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
