It is all about differrent charectrics of divergent people. A person can have several charectrics.
On the inception of the marraige, newly wed couple's charectrics are all freindly , humble , empathy however years change couple's behavior and convert "Bita" and "Jalal" to "Farzaneh" and "Mohsen". By then, the couple's love isnt more than a lie and their empathy , kindness, confidence die just like shown on Movie. The couple's behavior is utterly differs and they are both angry, distressed, averted and forcefully living toghetor because of their love to their son. Thanks to Mani Haghighi for his tireless meaningfull work.