Married at twelve years old, her husband, when she was sixteen, had already repudiated her, believing himself bewitched, and in danger in her society.

Impressed with this imagination, the King of Navarre, in an interview with his wife's brother-in-law, the Count de Foix, agreed that Blanche should be given up to him, and forced to embrace a life of celibacy, in order that her sister, Leonore, Countess of Foix, should enjoy her possessions.
When news was brought to Queen Blanche that she must follow the messengers sent to Olite, to carry her to Orthez, her despair knew no bounds: she felt that her doom was sealed, and her fearful destiny was but too clear to her mind.

She even, in her agony, wrote a letter of entreaty to her unnatural husband, to entreat his protection; but he remained deaf and indifferent to her supplications, and the doomed lady was taken away, a prisoner, to the tower of Moncade.
Hero, for two years, languished the ill-fated heiress; her captivity embittered by the sad reflection that her sister was her jailor, and her father and husband her betrayers.

A ray of hope suddenly gleamed upon her fortunes; but whether, in her secret dungeon, any pitying friend contrived to let her know that she had yet a chance of escape and triumph, does not appear.

Louis XI.