My grand father had two sons and a daughter,he died in the year 1956.In the year 1999,my father and my uncle,divided, my grand father's earned property,and it has registered,in the year,1999,it self,without any share to their sister.My father's sister has been married in the year 1967.Now is claiming, her share in her father's earned property,which has been divided,by my father and my uncle and the partiton registered.Please advise in the above issue.