Can wife claim in property acquired by parents/ or property

1.Kindly clarify ,can wife claim in property acquired by husband's parents,or the property with husband's parents name. 2.I have two kids ,have they any right in parental property or grandfathers property. 3.If my father write a will registered too,in other person favour ,will it be effective in presence of my father and can my wife or my kids try to claim . kindly reply,and let me know contact number of senior advocate to take advice in or around Ujjain area. regards, raj.