For five years, you had been unable to bore any child for your husband and lord, Alfonso X of Castile, which had caused great infelicity to you. You were not in blame -you were so very young when he wed you; you still were-, and yet, you still harboured anguish at the sight of your king’s infidelities and the thought of never conceiving his heir and seeing your marriage annulled haunted your slumber. The physician you had secretly summoned to your presence to help you overcome your supposed barrenness had only recommended you to rest and put your woes aside, giving your restless heart little hope. However, when Alicante was recaptured by the Crown of Castile and your kingly husband and you rested in a farm near the city, you fell, almost by miracle, pregnant at last.