Can a property transferred by way of gift deed be challenged

Hi, my father has 2 children. My sister and I. My parents are separated and my sister has sided with my mother. They are fighting a divorce and maintenance case currently. My father wishes to gift to me his only ancestral property to ensure that my sister does not file for a claim on that. All his other properties are self acquired and not ancestral and we have been advised that she cant legally claim any part of those. My question is that if we get the Gift deed registered property. Can my sister challenge it in court later claiming that her rightful share was not given or is my father able to execute per his wishes? Many thanks