What is the mother's share in deceased son's property?

We have 3 acres of ancestorial agriculture land with a house. How should the property be shared if a son dies intestate and has no children. Currently deceased son has left behind his wife, Mother and 2 sisters(Major). Question : If property shared 1/4th equally among all four (Widow, Mother and 2 sisters); Can a mother gets 50% of property share in widow's 1/4th property apart from getting her 1/4th share separately.