What does Marjis mother reveal in a flashback? Her husband responds by saying, That time in past,What do you think?

Can you tell me the name of the section or chapter this is in? 

Her mother  comes in and tells how her grandfather had been imprisoned for his political beliefs. When her mother had been a girl, soldiers had often come and taken her grandfather to prison where “sometimes they put him in a cell filled with water for hours.” Her mother had sometimes visited him, but his health had deteriorated quickly. He had had rheumatism and suffered in pain. Ending the story, her father asks her if she would like to play Monopoly now. Marjane tells him that she only wants to take a long bath. She sits in the tub with God beside her, trying to understand what it was like to be in a water cell. When she gets out of the tub, her hands are wrinkled, just as her grandfather’s hands had been in the water cell.