In Late Day Chapter 1, what did the narrator see and do when she waited by the Stage Door of the theater where Tracey had performed?

The narrator pressed against the side of a wall under a narrow awning by the Stage Door. She saw a car pull up driven by Tracey's mother. The narrator saw two sleeping young children strapped into their seats. When Tracey's mother parked, the narrator left and ran down Shaftesbury Avenue.