Right of married daughter to claim a share in the property of father

Dear Sir, My father in Law purchased one land property in my wife name and he is no more now. All original documents with my mother in law. Now She saying that there are no rights for that property to my wife because after my father in law died she has registered that property and spend some money. that also from her pension amount. and also she said she will not tel or information about the selling of property to my wife. she added saying that without knowing my wife it can be sell. we are saying you sell the property and share the money to four people. (1, mother in law, 2, my wife, 3 and 4 is wife sisters) b cox it is purchased by Father in law so its all rights to wife and daughters. how to hold the property sales without knowing my wife? Kindly advise us.