Deceesded Husband Ancestral Property Rights to his Wife If no issue

I AM 50 Years old my husband died at the age of 58 years , He had a property at chennai rental income of rs.40000 received now by his mother. It was purchased by my husband grandfather settled to his son my father in law, He wrote a settelement to his son as life estate if no issue and if first settle and first settle wife have no issue the property will go to his three daughters, unfortunately my husband died due to lungs failure in home, already he was a sick person, our married life is 19 years without issue in middle of life 6 years he put a diverced case it was declared by court given divorce as per my husband suit on ground of curlety and desortion, immedatly i filed a suit in high court for lower court order to stop, in meanwhile he was ill no one was there to lookafter him they called me and i lived with him eight years, the settelement was made during the divorce period. now I filled a partition suit in court for my husband share, lot of troubles i am receiving from my sister in laws to vacate the house what to do