Can I become sole member and owner of the flat?

I am a Hindu, and my in-laws are also Hindus from Maharashtra. My father-in-law became a member of a housing cooperative in 1980 along with my wife. The society share certificate lists my father-in-law's name first, and my wife’s name second. The housing cooperative purchased land and constructed buildings for its members. In 2013, my wife and I occupied the flat, and we have been living there since. My father-in-law passed away in 2020 without leaving a will. After his death, my wife applied to the society and became the sole member. My brothers-in-law and mother-in-law never objected to her becoming the sole member. In 2022, my wife passed away without leaving a will. Now, I am in possession of the flat and a member of the society. However, my in-laws are privately disputing this matter. Can I become the sole member of the society and own and possess the flat without my brothers-in-law or mother-in-law as members to co-own the flat? Can my major son become the sole member of the society and own the flat?