My dad's will was never filed in the state he lived in, but an old one was filed in another state so my stepmother could receive his portion of proceeds from a sold family-owned property. I know he had a newer will, but hard to prove it. The same attorney that did my stepmother's will is probably the one who did it, if I ask him if he did, does he have to tell me?
What is your underlying concern - that your stepmother might have inherited everything or nothing? More information might be helpful, but it won't change the confidentiality involved.