To go west means to die, but the context describes Mom being very much alive and that she doesn't want any elaborate funeral services.
Consider the statement "As Peter entered through the door teary eyed, Mom sighed When I am very much alive, I don't want any elaborate funeral services in my honor, OK?.". Is the statement "As Peter entered through the door teary eyed, Mom sighed When I go west, I don't want any elaborate funeral services in my honor, OK?" false? Yes/no/unknown