Hi Teri!
Welcome to NSC. Is your son in BUD/S, going to BUD/S, or already a SEAL?
Once with the teams, the guys network a lot. And, in turn, the women end up meeting lots of other women married to or involved with SEALs. Also, the teams all have an Ombudsman or contact person who will keep them in-the-loop about the happenings within the teams, events, etc. Your son can get her hooked-up with that information
It's a bit tougher at BUD/s to meet other wives/gfs. However, as the guys get further along in the program, they get to know each other better, especially after hellweek when they know who will more than likely be making it. At that point, they'll end up going out more and meeting other people in the community.
Your son actually holds the key to getting her together with the other wives and gfs! Tell her to ask him to help her make the connections.