It's quite a tense situation as Annemarie, along with Kirsti and Ellen, encounter a couple of German soldiers. The girls are petrified that the Germans will realize that Ellen is Jewish and take her away. Though only young girls, they're already old enough to know what the Nazi occupiers are capable of.
Annemarie's sister Lise was killed by the Nazis after it was revealed that she was a member of the Danish resistance movement. And Ellen knows full well of the terrible fate that has already befallen so many of Europe's Jews and which will befall her should her true identity be revealed.
So it's no surprise that there's an awful lot of tension in the air as the German soldiers approach the girls. The soldiers try to be friendly, and Annemarie and Ellen are sensible enough to realize that it's best just to play along. But Kirsti's having none of it. When one of the soldiers inquires as to her identity, Annemarie says she's her sister. Annemarie reaches down to hold Kirsti's hand, but Kirsti pulls away from her grasp, defiantly putting her hand on her hip.
As the soldier starts stroking Kirsti's hair, Annemarie hopes that Kirsti will behave herself. But she doesn't. Instead, she reaches up and pushes the soldier's hand away. Thankfully, the soldier just laughs it off and tells the girls to go home. Kirsti made the mistake of drawing too much attention to herself, but mercifully, there were no serious consequences.