Your stepmother will inherit everything (including the responsibility to inform debtors of his passing) if there is not will. If you believe that there is a will that she is not sharing with you, then you will need to file an action against her with the probate court in the county where your father lived. You can also tell the probate court about your father's wishes concerning his headstone.
You can try to go about it yourself, but if there was a large estate or you think she is hiding a will and will need to track down the witnesses and the notary or lawyer that created the will you should probably hire a lawyer yourself, or it can be tied up in probate court for years! Good luck!



