What did Anne-Marie realize that her father was speaking in code to her uncle? What was the conversation about

Papa wants to bring the whole family Henrik's home, but Mama insists that if Papa skips work, he will make the Germans even more suspicious. Later that day, Annemarie hears Papa speaking on the phone in code to Uncle Henrik. He tells Henrik that Mama is bringing him one carton of cigarettes—that is, one Jewish refugee—today, but more will be coming. At this time, though, Annemarie does not yet fully understand the code.

What made Annemarie realize that her father was speaking in a code to her uncle? What was their conversation really about? (Chapter 6)

Annemarie realized that because her father tells Henrik things in a code. Their conversation was about mama bringing home one carton of cigarettes.