As a result of the improper dress choice, the whole thing unravelled
Demetra wore a blue romper to school that day because she wanted to be prepared for the heat. At the start of the day, she had no idea that her outfit would be the talk of the school.
When her father dropped her off at school, he saw her in the clothes she had chosen. The only way she could tell if her outfit was acceptable would be if her father approved.