My mother aged 61 years (through power of attorney to her son) and my only brother aged 34 years together executed an irrevocable settlement deed in favour of my mother's minor grandson and my brother's son aged 5 years retaining settlor's individual life interest. Unfortunately my brother of late has become mentally imbalanced. My brother's in-laws (particularly his wife's two brothers)are now threatening to dispose of the property by taking undue advantage of his mental illness. We want the minor son to enjoy the property and not dispose it. We are also not in favour of disposing the property and depositing the white money in bank/court while the black money will be cornered by the wicked designs of my brother's in-laws. We also fear that my brother will be chased out of their house without shelter and food once the deal is over and his minor son will also be deprived of the same. Kindly advice as to how the property can be protected. Is it possible to rewrite the settlement deed with some clauses which will protect the property for the child. Presently, the child is under the wife's custody and she is staying in her mother's place. The property is situated in chennai city. Please help us.