The poem "The Cat and The Moon" was originally written by Yeats as part of a play, first produced in 1917. The first two quatrains of the poem open the play, the second two quatrains appear a short while later, and the final three quatrains end the play. The play is not about a romance at all, but about two beggars, one blind and one lame, who have been travelling together for forty years, depending...
Preceding should be the answer.
THE ANSWER IS:
Mr. Van Daan is stealing food, thus, Mrs. Frank wants them to leave the annex.