My father in law died 23 yrs back.The flat (block) in parle- mumbai is on my mother in law's name with husbands name in nomination .My husband has elder sister and two sisters smaller than him ,now all married. My husband has been fulfilling all will and needs of my mother in law .my husband is sending all monthly expenses .Five years back my mother in law was seriously ill due to which 5 lakh rupees were spend ,all was done by my husband ...now the situation have changed my mother in law care more for her she feels her three daughters are everything .my mother in law does not care for my husband in any sense though he is doing all this since 23 years .now question is what are the legal rights of my husband in the flat in Vile parle mumbai . can my sisters in law claim any rights in property which is on my mothers in law's name with my husband name in nominations
Can my mother in law take any decision without my husbands notice or in private
kindly help me take any legal steps . my husband still wish to take care of my mother in law as he has been all these years since 23 years ..

