It strengthened the friendship that had been created with Queen Marie de' Medici to delegitimize the claims of Henriette d'Entragues, sister of Charles of Valois and lover of Henry IV, who claimed that her son was the legitimate heir due to the King's promise of marriage. Margaret often helped plan events at court and nurtured the children of Henry IV and Marie. In 1608, at the birth of Prince Gaston of France, future Duke of Orleans, Queen Margaret was chosen by the King himself to be the godmother.