Maybe Some Other Time (1988)

Originaltitel: شاید وقتی دیگر

Famed actress Susan Taslimi plays three roles here: Kian, who doubts her identity; Vida, the twin sister, a self-assured artist; and their mother, who gives up one child out of fear of poverty, then deprives the other of affection because she deeply regrets the child whom she has abandoned.