What significant events happen in Chapter 5 of A Thousand Splendid Suns?

Mariam turns 15 years old at the beginning of the chapter.
She has a special wish for Jalil: Her father had already told her about a special
American cartoon that was playing at his theatre, and Mariam wants to be taken to see it
along with her brothers and sisters. It is Pinocchio. Jalil
promises to send the car for her at 12 noon the next day, but he never shows up. Mariam
decides to make the trek across the stream and up the hill for her first visit to Herat
to find him. She catches a ride to Jalil's house, where she sees his car. But the
chauffeur tells her that Jalil is not at home, so Mariam decides to wait. Despite the
driver's protests, she spends the night outside. The next morning when the driver
attempts to put her in the car to take her back home, Mariam rushes through the gate
into the garden. When she looks up, she sees Jalil's face in a window. He has been there
the entire time but has refused to see her. After the driver escorts her home, he tries
to shield her from a horrifying sight: It is Nana's lifeless body, swinging from a rope
in the weeping willow.