Family estate help

My mother recently passed away and I believe that she has a share in the house that my grandmother and two great Aunts owned. My grandmother left a will for her part that stated that one of my uncles and two of my Aunts have the right to decide who stays in the house. I was wondering if they could over rule my great Aunt's daughter and kick me and my sister out of the house?

My grandmother had seven children all together and one of my great Aunts had two children but one died. I have lived in this house with my grandmother,Great Aunts,Aunt,sister, and mother for over twenty years.