The Princess Hatshepsut was the heiress daughter of Thotmes I. and of Queen Aahmes.  If she ever had brothers of her own, they had died as children, as had also her elder sister, Khebit-neferu.  This left the young Hatshepsut sole heiress, with no one but a half-brother to claim a share of the crown.  The youthful prince Thotmes II., was the son of Thotmes I. by a mother of only half royal lineage, Mut-nefert.  To this half-brother, Hatshepsut was united.  The marriage of Thotmes to his strong-minded sister, who was destined to overshadow him completely in later years, occurred either just before or just after the death of their father Thotmes I.  Shortly before this event, the king associated his daughter with himself in the government of the kingdom.
    The coronation ceremonies took place a few weeks later, and the joint reign of Hatshepsut and Thotmes II. appears to have lasted about thirteen years.  There is little doubt that Hatshepsut, with her stronger character, had the management of the kingdom chiefly in her own hands, even during the lifetime of her husband... (The Queens of Egypt, Buttles, 1908).