Negotiations were already underway for Margaret of Anjou to marry the young king of England. Blanche de Fleury was one of the young girls who had grown up with Margaret of Anjou. She had been brought to the Count of Anjou's court at the age of six. Her mother was dead, her father remarrying, and if the truth be known, she had been considered an encumbrance by her surviving parent. She was three years older than Margaret, but the duchess thought that Blanche de Fleury had beautiful manners and would make a suitable companion for her daughter, Margaret.

At first Blanche was like an older sister to Margaret. But as the young girl grew, the two became friends. When Margaret was sent at the age of twelve to her paternal grandmother to be trained to be a queen, Blanche went with her, as did the young physician, Alexander Givet. But before they departed for Yolande of Aragon's household, it was decided that the young physician should be wed. The count's mother looked among her granddaughter's companions and concluded that the fifteen-year-old Blanche le Fleury was a sensible choice. She sent to the girl's father for his permission, although it was actually no more than a formality since the count approved the match his mother was proposing. It was, Alix's mother later told her, a fortunate match. She was acquainted with the young physician, and like most of the girls in Margaret's circle, Blanche thought Alexander Givet handsome. She was not unhappy to find herself his wife.

Her new husband was, at twenty-five, ten years her senior. And to her surprise, he was interested in what she thought and what she wanted. And Blanche did indeed know what she wanted. She wanted to remain with Margaret of Anjou. In this her husband concurred, for to go to England among the household retainers of its new queen was quite an honor.