What is the theme in Marie Antoinette: The Journey by Antonia Fraser?

Another theme is the importance of family. Antoinette forges a close relationship with a sister and later with her brother. Though her relationship with her mother is less-than favorable, she seems to desire her mother's love and affection. With this lack in her own childhood, Antoinette seems determined to avoid the same mistakes with her own children. When her first child is born, she keeps that daughter with her for some time, going so far as to nurse the child though it's known to be a contraceptive and is discouraged because it delays the birth of the next child which is a potential heir to the throne.