She replaced her predecessor, Qahramana Fatima, who drowned in the Tigris when her boat was caught in a storm.
In 912 for example, vizier Abu'l-Hasan Ali ibn al-Furat was arrested and deposed after Umm Musa informed the Caliph of a plot on the assignment by Muhammed b.
[1] Her plotting for her favourites, the corruption of her family, and her hostility towards the "good vizier" Ali ibn Isa al-Jarrah, who was dismissed due to her machinations in 917, are underlined in the chronicles of the period.
When she married her niece to Abu'l-Abbas, a grandson of al-Mutawakkil (r. 847–861), her rivals were quick to accuse her of aspiring to overthrow the Caliph and place her nephew on the throne.
In 922/3, she was arrested and replaced by Thumal, who tortured Umm Musa, her brother, and her sister, until they had revealed where her treasure—reportedly valued at one million gold dinars—was hidden.