How do I adress this weddding invitation?

Dreamcometrue

New member
My future MIL was a master sergeant in the airforce. She is divorced but keeps her husbands last name. An example I read was addressed as so: Lieutenant Beth Adams, U.S. Navy, and the inside card was just Lieutenant Adams. I have no idea about titles in the AF and I don't want to offend her! How should I address her invite?
 
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