Kösem Sultan position held valide sultan
Rivalry with Turhan Sultan
Mehmed's mother, Turhan Sultan, was presented to Kösem as a gift from Kör Süleyman Pasha, the Khan of Crimea, when she was around 12 years old, so it was presumably Kösem who offered Turhan to Ibrahim as a concubine. The post of valide sultan and regent should have gone to Turhan when her son Mehmed became sultan, but she was passed over because of her youth and inexperience. Turhan must also have resented the stipend of 2000 aspers that she received in comparison with Kösem's 3000 aspers and so she began to assert what she saw to be her rightful authority. According to Rycaut: "The two queens were exasperated highly against each other, one to maintain the authority of her son and the other her own." In 1649, Kösem promoted herself to the non-existent rank of büyük ("elder") valide sultan.Historians have recorded that Kösem would usually sit in the palace lodge with her grandson Mehmed, handing down decisions. She would also sit beside the sultan, concealed behind a curtain, if his presence was needed at the divan. In one instance, she scolded a vizier in an abrasive tone: "Have I made you vizier to spend your time in gardens and vineyards: Devote yourself to the affairs of the empire and let me hear no more of your deportments!"
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