Isabel felt that her blood flow was too heavy, so she was sure she wouldn't make it to buy sanitary napkins and back. So she continued using sanitary paper, barely making her way out of the restroom, and began calling out for Percy.
Perhaps because her voice was a bit loud, not only did she call Percy over, but she also summoned Raymond as well.
Since Raymond was present, Isabel swallowed the words she originally wanted to say, "I got my period, can you help me buy some sanitary napkins?" She racked her brain for a moment and then said to Percy, "I need some bread, can you help me buy some to bring back?"
Many girls understand the hidden meaning behind these words, but they lose their implied meaning when they reach a man's ears. So Percy frowned and said, "Didn't we buy a lot of bread before picking up Raymond from school tonight? Why do we need to buy more?"