The character of Eve (The Mother) was created by Woody Allen with 'Ingrid Bergman' in mind. He offered her the role, but she regretfully declined, as she was already committed to shoot Autumn Sonata (1978) in Norway with Ingmar Bergman. The part went to Geraldine Page instead, and then both she and Bergman were nominated for those films for Academy Awards and Golden Globes. Both lost out to Jane Fonda (who won for Coming Home (1978))
This is the only Woody Allen directed film where Allen does not co-star and Diane Keaton has a major role. In Radio Days (1987), where Allen does not act either, Keaton has a minor part.
(at around 8 mins) When Eve and Joey are drinking coffee after moving the lamp, the mugs bounce on their legs, no steam rises from the mugs and no liquid is visible, the mugs also move very freely when being lifted for a "drink". All of these things point to empty mugs.