• Does my paternal aunt (mother in law) has right on my grandfather's property willed to us?

My grandfather died in 2014 due to cardiac arrest and in the year 2012, my grandfather has written a will to me and my brothers. In the year 2017, As I was out of station, one of the property willed to us was sold off by my father being guardian with our consent. This property is self acquired by my grand father and finally we are left with only one ancestral property which is willed by my grand father to us and it is just 8 cents of land. As far as I remember from my childhood my father and grandfather helped my aunt in all possible ways at the cost of selling/losing our properties like for her daughter's marriage we asked them sell off our house in my village and for their business they mortgaged our farming land and we had to get it out at very huge cost after 1 and half decade, this the farming land we sold off couple of years ago for our needs. 

We are only left with a 8cents of plot which may not cost even 5L at maximum, now my aunt sent a court notice to my father for share in the 8cents of plot which is ancestral and farming land sold off which is self acquired by my Grandpa. This legal notice was sent to both my father and the buyer of farming land.

Not to boast about my father but he took care of both his parents, his siblings (one elder brother and two sisters) very well at the cost of his wealth, health and our future. My father has to sell off three properties to meet the needs of his parents, siblings, our education and upbringing.

We(4 brothers) are only left with one 8cents plot of Grandpa's property and my aunt, her children eyed on it and sold of land. 

My aunt may have right to ask 2cents equal share as my grandpa has four children. And my father is blessed with four children including me.


My gut feeling is to explain my aunt about the responsibilities my father took care and the expenses incurred for both my aunties and my father's elder brother, my grandpa's surgeries etc and my father's health condition as well deteriorated after stunt implants and other complications. 

Keeping all above in mind, suggest us wisely in addressing above situation so grandfathers will to have the remaining 8cents with his right heirs being our four brothers can be fulfilled?

How should we deal with this situation verbally to avoid court trail and sort it out by sitting with elders?

If my aunt doesn't agree and insists for court trail, how we have to proceed and our strategy to face the court trail?