Muslim Step Mother not giving share in house property which was purchased by Grand Father's (father's father)
After grand fathers death and my father transferred the house in his name.
Now Father died and step mother transferred the house in her name.
Father married to our step mother to take care of us. But she hated us. She also has one son and one daughter. Mother died in 1982, My Grand father died in 1991. Father died in 2013.
I have ONLY XEROX COPY of the purchase document of THE HOUSE purchased in 1972 by my grand father written on Rs.20 stamp paper. My grand father's signature is affixed on it. Original stamp paper copy is with my step mother.
Till 1983-84 the Property TAX and Electricity Bill was in my Grand Father's name.
As per Muslim Personal Law Is my sister also eligible for share in the house property.
My step mother is not ready to accept us as legal heirs in the house property.
What should I do to prove my share in the property ?
What are the documents required?