1) we need the facts of case to advice you
2) who is the owner of the property ?
3) Is it self acquired property of your father ?
4) if property has remained undivided fir four generations it is ancestral property
5) did your father leave any will or he died Intestate ?
6) on father demise intestate tiur mother , you and your brother would be legal heirs
7) on brother death his wife woukd inherit his share in property