My father owned a flat in Mumbai, purchased by him through is own funds in June 1960. He expired in 24th Jan 1976 intestate, the flat being nominated in my Mothers name was transferred in her name by the Society on 6th Jan 1978. Her name still appears on the Share certificate as well. She 85 yrs old and mentally fit and fine. Now can she sell the flat as an absolute owner or partition as per her choice?