My mother-in-law died,leaving property but no will. Do I have any rights in what my wife inherits from her mother?

Answers

No! As long as what your wife inherits remains registered solely in her name,whether  it is real estate, or money, you have no rights in it, unless the money (or proceeds of sale of real estate) is  deposited or invested in a joint account. If it is, then it becomes joint property. Under Israeli law property gained by inheritance does not become joint property between spouses.