Father Will For His Self Acquired Property

I am Deepa my father who expired 10 years ago back has left a will for his self acquired property, The will states that my mother is entitled to enjoy the benefits from the property and has not right to sell or change the will and that the property should go to youngest daughter that is me after her lifetime. My doubt is that will my other sisters have any claim to it or should I take any No object certificate from my mother to change the Khata to my name after her lifetime. Please advice