The mother-in-law only cares about the stepmother, regardless of her son and grandson.

Your father-in-law has been dead for two years. There is nothing wrong with your mother-in-law finding a second wife. A good mother-in-law takes care of her son and grandson, and many of them are indifferent. Try to solve it independently. There is really no way to ask for help. It can only be a good relationship with my mother-in-law. As for the child, it depends on her mood.