My Father and mother both are alive.
My brother went for divorce( Brother had 2 yrs female kid). My sister in law sent notice about property share. They sent like they will get the 1/6 share X,Y, and Z.
How much share I will get from property X and property Y & Z.
How much share my sister in law and my brother's kid will get from property X and property Y & Z.
Can my father create will on self-acquired ?
The property x is your father's self acquired hence it cannot be touched by anyone other than himself.
The property Y, probably your grandfather's property hence you call it as ancestral property, however if it was allotted as your father's share in any partition among his siblings, then this property Y also becomes his own and absolute property.
In this property also he only has full rights and he can dispose this property in any manner and to anyone of his choice hence there is nothing to be worried about this.
The same thing applies to the properties belonging to your mother 'Z' .Your sister in law is a third party in the house hence she cannot claim any share ion the property as a right.
In fact you and your siblings do not have any rights in the properties X Y Z, therefore your brother's son also dont have any rights in the said properties.
Let she file any suit, it is not maintainable in law.