Before becoming a full owner u/s 14 of the Hindu Succession Act, it was necessary that she must have acquired the property either by

Inheritance or device or on a partition or in lue of maintenance or arrear s of maintenance or by gift from any person. There is no evidence on record that she acquired the property in any of those manners. Unless she was a limited owner ,she could not have become a full owner.

By mere residing along with her husband and continue to reside after the death of her husband, wife can't be said to have acquired the said property as envisaged in sect 14 of Indian Succession Act,1956.