Marriage

I married my husband 1.5 yrs back. My mother has bi polar and his mother also has bi polar. Thinking we will understand each other's responsibilities better. I married him. From day 1 of marriage I realised his mother's condition is bad and she is never normal. His father is also weak and cannot walk properly. My husband is the youngest and he has elder brother and sister. Within 2 days of marriage they left me with all responsibilities. There was no help and support from his elder brother nor sister. After 1 year I and my husband shifted to our flat and he asked his elder brother to take responsibility equally. His brother denied taking responsibility and everything is expected to be handled by my husband and in turn me. The elder brothers wife taunts and insults me at every opportunity she gets. She also intentionally for tulsi vivah tried to burn me. I am a working woman pursuing PhD and my husband, his brother and my sister in law is trying to pressurize me to take care of his parents. I looked after them for 1 year out my 1.5 yrs of marriage. I cannot handle any more. Also they were expecting I will handle all their ancestral home responsibilities. Though I am youngest bahu in the house.