Mother in law misbehaving what action can i take?

My Mom in Law has had very bitter post marriage experiences from her in laws and her husband (My father-in-law).She has an elder daughter and two sons all married. The problem starts here I am her younger daughter in law and stay in a nuclear family at some other town other than her's. Whenever I visit her place she seems to be full of negativity and always tries to impose her feelings and advice on me suggesting me ways to eat sit dine bla bla bla...she is the most dominating woman on earth. Her children think (including my hubby)that she has been tortured all these years hence behaves like this.But what I feel is she is taking undue advantage of the sympathy of her kids and misbehaving with her daughter in laws. I go not very often but the elder daughter in law is working and stays with her. Pls.tell both of us how to cope with her.