What are the legal rights of women in the ancestral property?

My grandfather divided the land among his three sons, one of whom is my dad, and allocated a part to his wife. The wife’s portion is intended to be divided among her three daughters (my dad's sisters) later, as per my dad's advice, to ensure they receive some support. However, one of my aunts has sent a legal notice regarding both her mother’s and the three brothers' property, demanding a larger share than proposed. Will the land be divided equally among the six children, or will only 25 percent be allocated to the females, with the rest divided among the males? According to the law, what rights do the females have regarding this property? Please help me understand how to proceed in this situation. Thank you.