The plaintiff as a litigant has to pay the court fee without which she cannot file a suit.
The requisite court fee need to be paid without which the court will not take the case on its file. The maintainability of the case shall depend on the proceedings of the case and decision of court.
The court fee is different from that of seeking relief through the case filed.Whether the relief sought by her is maintainable or not will be the question of law and will be decided by court as per position of law.
You do not have to file any suit, you can just file a written statement denying her claim citing that since this property was your fathers self acquired property and was transferred to your name during his lifetime, she is not entitled to claim any share in the property.
You do not have to go very deep into the law and discuss the amendments of the succession act.