Why does Liesel return to the mayor’s house? What does this suggest about her character? Explain.

Liesel returns to steal another book..... just as Ilsa walks into the room.

Her knee was up and her book-stealing hand was poised against the window frame. When she faced the noise, she found the mayor’s wife in a brand-new bathrobe and slippers. On the breast pocket of the robe sat an embroidered swastika. Propaganda even reached the bathroom.
They watched each other.
Liesel looked at Ilsa Hermann’s breast and raised her arm. “ Heil Hitler.”
She was just about to leave when a realization struck her.
The cookies.
They’d been there for weeks.