How does Dilip's mother react when she sees some boys openly defecating when she first arrives in India from America and how does the narrator feel?

Dilip's mother reacts with disgust when she sees boys openly defecating on their drive from the airport. The narrator assumes that the boys are choosing the better option for them but does not say so to her future mother-in-law. Dilip's mother records the boys and watches the video over and over and laughs while they drive to their apartment.