Season 2 of Bridgerton is based off of Julia’s second book in the Bridgerton novel series, “The Viscount Who Loved Me.”

In the book (via Julia Quinn’s official website) Kate and Edwina’s mother Mary thinks to herself that she would have preferred to wait for Edwina to make her debut when she was 18 and “a bit more mature,” as opposed to 17, but “would have made Kate nearly twenty-two, and heavens, but who would have married her then?”

Source: https://www.distractify.com/p/how-old-is-edwina-sharma-in-bridgerton