She was the second child and only daughter of Crown Prince Edward Winton and his wife, Cynthia Gundersen-Winton. Her older brother was Richard Winton, who became the crown prince when their grandfather, King Michael I, abdicated and their father ascended to the throne.
Shortly thereafter however, there was a terrible boating accident on Jason Bay: Sophie's hydroplane ran into small object and capsized. She and her father, who attempted to rescue her, were both killed in the subsequent explosion of escaping hydrogen. (MA3)