Partition of property when husband has two wives

I am from Hind family. My fathers age is 80 year My father have two wives. He makes two marriages because first wife's character is not good. First wife having two sons & one daughter .second wife having Two son's .Now I speak with him about property distribution. He never show interest in this subject .he said after my death you will get all property equal. I have always doubt in my mind " That is possible without dispute ?" Because my step mother never allow in native place also. She say this my property . You never look at this property. Plz help me how to handle this case.