My grandfather was one of three brothers who owned a house in Kolkata, where most of our family resides. After my grandfather's marriage, he had four sons and one daughter. My eldest uncle and my father, along with their respective families, moved out of the house after marriage. However, my two other uncles and my father's only sister continued to live in the same paternal house.
Unfortunately, recently, my father, one of my uncles, and my aunt (father's sister) passed away. Currently, only my younger uncle remains in the paternal house. As my sister (the daughter of my father's elder brother) and I are the only heirs to our portion of the property, we are concerned that the other family members residing in the house (belonging to my grandfather's other brother) may attempt to seize our share through forceful means.
Given that I have not been residing there, I would like to ensure that a legally binding document is created, clearly stating our portion of the property. This document should designate my uncle, who is currently living in the house, as the trustee or custodian of the property, with my cousin sister and me as the designated heirs. This arrangement will help prevent the other individuals living in the house from unlawfully occupying our designated rooms.
Could you please advise on the best course of action in this situation?