The inhabitants of the Secret Annex learn that they will be restricted from doing anything during the lunch hour because Mrs. B, who used to be demonstrator for the business, wants to eat her box lunch in the office at 2pm every afternoon.
This also means that they can’t get supplies and potatoes from Bep during the lunch hour.
The group jokes about getting rid of Mrs. B by slipping her a laxative.
Anne notes Mr. Dussel’s bathroom use schedule. He seems to go very predictably at the same times every day.