My wife has three sisters and one brother .First sister is alive and married. Second is my wife . Third sister is married but expired leaving behind husband and a daughter. Fourth is brother and youngest is sister who is unmarried. My wife’s parents expired in 1983 instate leaving behind one plot in Patna , one house in Muzaffapur and agricultural land and house in village. My wife’s brother has sold plot in Patna and most of Agricultural land in village without consent of his sisters. My wife’s youngest sister has filed case against her brother for getting her share in which other sisters and inheritors and all the purchasers of the properties have been made defendents. My wife has got notice from the court. What should my wife do to protect her share of property ? If she does not do anything will her share in the property will be treated as relinquished ? What should my wife do to get her share of property ?