My take:
No recent work experience - she is probably no longer really employable or on early retirement/disability.
Gaithersburg HS kids were unlikely to be at same parties kids from Georgetwon Prep kids were at - kids tend to associate withing same soical circles. In early 80s Gaithersburg was far outer suburbs 20 miles away full of low cost townhouses - entirely different milliu.
I never attended any HS parties in DC where girls pulled a train - we actually got grossed out when one of the girls at my private HS had sex with a couple randon guys at a Potomac house party when she got drunk. Pretty sure the crowd I ran with was far wilder then the prep school boys.
and she’s older than him so she was out of high school going to HS parties?