If it was your wife's grandfather's self acquired property, upon the intestate death of the deceased, his legal heirs will be inheriting the property and it will become their own property in which the next generation siblings do not have any right or share in the said share of the inheritors. Suppose it was ancestral property and your wife's father had acquired his share, your wife will be having a share in it to the proportion of 1/3 out of her father's share in the said ancestral property. Therefore it depends upon the nature of property in the hands of your wife's father.
