Why did Megan Markle write messages on bananas for female sex-workers during a visit to Bristol?

During the visits of monarchs, each trifle is carefully planned in advance, and each step is described in detail. Therefore, when Megan Markle, which will be the mother for the first time this spring, while visiting a charity organization in Bristol, suddenly asked for a marker and no one in the room knew what would happen next. «I have an idea!» said Prince Harry’s wife, standing in the kitchen of Bristol One25, an organization that helps sex-workers and those who are struggling with drug addiction and other social evil.