my uncle is died(2005), he has two wives ,4 sons for 1st wife .2 daughters for 2nd wife,1st wife is died (2000) ,elder son tried to have all property to his name but Tahsildar caught him and ordered in joint account in the name of 1 st wife and elder son ,then elder son made a plan he told some lies to step mother and step sisters and taken them to register office (2007)and got sign without showing summary of property paper and got registered ,property shared unevenly,now the 2nd wife and their two daughters came to know their property was stolen and they are signed also ,now what can they do have right share on his fathers property?