Her son and her adopted family are both very much in the military, so she'll spend some time in this area just out of curiosity about how the structure differs from at home, and because she's an expert at filtering through the types of rumor that drift down from the upper echelons to the general rank-and-file. She can provide some medical assistance for minor maladies and ailments - things that soldiers might prefer not to go to the official doctors for - if she happens to run into them or be brought them as requests.