Will still not probated going on four years, what can we do?

Mother in law died on February 16, 2009 in Kinston, NC. My wife and her sister were the only siblings. My sister in law had power of attorney when my mother in law lived and is executor of the estate after death. My wife died on November 4, 2012 without ever getting my sister in law to probate the will. My sister in law is a Maryland resident and North Carolina law will only allow residents or resident attorneys to probate a will. What can my daughters and I do to end this situation with the will? And is it true that a will is not required in NC if only property is involved? My sister in law also told my wife that a certificate of deposit was left to my wife but it also has my sister in law's name on it but sister in law insisted it was for my wife. Is there's anything that could prevent my sister in law from claiming the CD with a copy of my wife's death certificate which now I wish I hadn't given to her?