They're part of the dress code

"We're putting you in diapers so that we all match," Tiana reveals.

Aaron is stunned. "What do you mean?"

Once Belle finishes diapering him, she stands back up, helping him to his feet. She then takes the hem of her dress and lifts it up to her waist. To his surprise, beneath the Frenchwoman's elegant yellow flowing gown, there is a layer of padding wrapped tightly around her waist.

The astonishment does not end there. One by one, the other princesses lift up their own skirts, and every single one of them -Mulan, Tiana, Snow White, Cinderella, Pocahontas, Raya, Ariel, Aurora, Merida, Elsa, Anna, and Eilonwy - is diapered. The thickness and material of their diapers varies, but every single one is padded.

Aaron is amazed, and he mutters, "You all look lovely."

"Why, thank you," Belle says happily. She then pats the back of their guest's diaper. Some of the other princesses do the same. Aaron finds he rather enjoys the sensation.

"Alright, ladies, what now?" he asks