Would David Chase have written Livia Soprano to cooperate with the FBI against Tony if not for Nancy Marchand's death IRL?
So, in S03 we see that Tony visits his mother and tells her not to discuss anything about the ticket fraud scheme for which she was caught in S02 ending. Livia just waves it off. But, would David Chase have gone ahead and used her against Tony if not for the Nancy Marchand's death?