Husband ia mentally unstable

Hello everyone, My husband is suffering from a rare disorder which he along with his family members concealed from me. I married him 12 years back and we have a 7 n half year old son.we stayed in a flat in thane.(just me my husband and son). My father in law used to visit and used to stay back for one to three months depending on his wish. He has narcissistic quality. He criticises everything under son. So living along with him was literal hell and mental torture. Moving along we were normal family untill i got to know about his disease three years back. I still stayed back looked after him and after one and half year later i felt that the place we were staying, we couldn't afford it as i was fulltime homemaker and my husband was the only breadwinner. Due to his deteriorating health there was always the uncertainty of losing his job. But he was adamant to go back to his joint family in solapur and i wanted to go back to my maternal place. Last year i moved back to my maternal place along with my son. In the meantime they filed a case against me in thane. Later i filed a DV case in my hometown. Agin they filed an RCR in solapur. Finally I filed for divorce. He left his job in last december to avoid paying maintenance. But his family comes under HUF and have lot of property still they have not paid a rupee towards me or my child. What can i do now? P. S. My husband also has few savings in stock and also end of service benefits like PPF, company shares and few insurances.