Negligence of daughter in law for in law.

Questions from nephew on behalf of grandmother. 1. Grandmother's daughter in law does not stay with her, and has been doing so since 15-20 years. What legal rights does she own on her in-laws property? 2. Daughter in-law with her own biological father and her son, sold a property of mother in law(70+), put all the money in bank account of her son and has not been providing any care to old mother in-law, but stays with her parents and barely visits in law for any care. What legal action can be taken against them? Note- My uncle stays with grandmother and has no job. Daughter in-law is uncle's wife. 3. When asked grandmother on how she agreed to sell the property she owned to a property dealer when accompanied with her daughter in-law, daughter in-laws father and daughter in-laws son, she says she has no memory. The money acquired by the deal was never reached to grandmother, instead was taken away by her nephew(uncle's son) and till day refuse to provide any kind of legal aid to her from.her own money. What action can be taken against them? 4. Grandmother refuses to take any action against her daughter in-law, and nephew for taking her money away, not taking care for her and abandoning her. As a nephew, can I take any action against the mistreatment that she is facing? 5. Is there any way that the money acquired from the sale of property and taken away by her daughter in law and grand child can be acquired back so that grand mother can take care of herself in old age? Note- She was put under a false pretext that the amount will be put in her account, instead was never deposited in her account, but taken away by grand child. 6. My another uncle was admitted in hospital last year and my grand mother asked her daughter in law for her own money(from sale of property) for the treatment of my uncle, bit she refused to give by saying that let my son(daughter in law's son) come from and then she will give the money. He never came. (Avoids coming as he then will be asked to return the amount). My uncle died due to not getting the required medical assistance on timely manner due to lack of funds on time. (Money was arranged form other sources) . After my uncle's death, the daughter in law purchased a new car(from grand mother's money which she is not giving) just after 2-3 weeks of uncle's demise. Even now they refuse to give any money to grand mither, but themselves live a lavish lifestyle. Grandmother stays in a pathetic condition. Has got paralysis attack 2 times till now. Is me tally and physically weak. What action can be taken against every ill treatment to her? Note- Daughter in law sales not say with her in-law since many years, but stays with her parents. Provides all the lifestyle to her parents, children and herself from.the money illegaly acquired form my grandmother. Grand mother refuses to file any complaint. Seems like she is staying under some fear.