On the same day, her mother was given the titles of Duchess of La Vallière and of Vaujours, which she perceived as a kind of retirement gift and a sign of the end of her relationship with the king.

[citation needed] On 16 January 1680, at the age of 13, Blois was married to her distant relative, 18-year-old Louis-Armand I de Bourbon, Prince of Conti (1661–1685), in the chapel of the Castle of Saint-Germain-en-Laye.

During its five years, their marriage remained childless, and the princess shocked the royal court by openly stating that her husband was not good at sex.

[citation needed] In June 1682, her beloved brother Louis, by then legitimised and created the Count of Vermandois,[3] was exiled for his participation in La Sainte Congregation des Glorieux Pédérastes ("Holy Congregation of Glorious Pederasts"), a secret group of young aristocrats practicing le vice italien ("the Italian vice"), male homosexual sodomy.

[citation needed] For a little over 4 years following her marriage, she was one of the most important ladies at her father's court, outranked only by Queen Maria Theresa, Maria Anna, the Dauphine (from 7 March 1680), Elizabeth Charlotte, Duchess of Orléans and the two daughters of the Duke of Orléans, Princesses Anne-Marie, Madame Royale (until 10 April 1684) and Élisabeth-Charlotte, Mademoiselle de Chartres then Madame Royale.

[7] After the death of Louis XIV on 1 September 1715, leaving his 4-year-old great grandson the throne, a regency was established and the dowager princess' brother-in-law, Philippe II, Duke of Orléans (1674–1723) was appointed regent, de facto ruling the country between 1715 and 1723, a period of French history known as régence.

[8] In 1721, the princess was put in charge of the education of Louis XV's 3-year-old fiancée, Infanta Mariana Victoria of Spain (1718–1781), her grandniece.

[citation needed] It is possible that in 1698, the 32-year-old dowager princess, renowned for her beauty, received a marriage proposal from her 15-year-old nephew Philippe, Duke of Anjou (1683–1746), a younger son of her legitimate half-brother Louis, the Grand Dauphin of France (1661–1711), who would later become King of Spain.

[citation needed] She also refused a proposal from the Sultan of Morocco, Ismail Ibn Sharif (circa 1645–1727),[9] preferring her freedom as a widow.

[citation needed] In 1713, she bought the Hôtel de Lorges on Saint Augustin Street (rue Saint-Augustin) in Paris, where she lived from 1715.

She later gave this castle to her nephew and heir, Charles-François de La Blaume Le Blanc to settle some debts.

[7] With her only legitimate half-sibling, Louis, Grand Dauphin (1661–1711), she had a close relationship, and often visited him at his country estate, the Castle of Meudon.