Second wife children's rights on Ancestral property

My father has married to second wife when my mother(first wife )is alive. We are 3 children to my mother and for my father second wife having 2 children's. My father having ancestral property(Agriculture land) wherein he has not done any will(he has passed away in the year 2010). Please advise what will be sharing pattern in the ancestral property for my mother, two sisters, Me and what will be sharing pattern for second wife two children's according to the Hindu law. Currently property is in my mother name.