Saif Ali Khan's sister Saba reveals she had brain tumour at 27. Saba Ali Khan, daughter of veteran actress Sharmila Tagore and sister of Saif Ali Khan, revealed she was diagnosed with brain tumour at age 27. Calling it "completely unexpected", Saba said she initially felt uneasy and mistook it for a stomach bug. Later, she fainted twice in a day, following which she underwent a brain surgery.