limitation period to claim share by mother in predeceased son property

My brother Mr.A died on 20th feb.2005 and my mother died on 10th Jan.2007.My mother was also primary heir in her predeceased son Mr.A property What is the period of limitation for claiming my mother's share in Mr.A property.Under which article of limitation act this will come.Adverse possession may be established by Mr.A family and I may not be able to claim my share in my brother property.My brother family is in exclusive possession having independent portion with seperate gate.Limitation period will start from which date.