Why is she riding the subway?
Yes that is odd unless it is very convenient to do so but being very pregnant one would think not.
In NY, its always been the way people travelled. I had an elderly aunt who grew up in NY City and was a young woman in the 1940's and 50's. She wore gloves in public, pillbox hats with short veils, etc... In her photos she looked like Grace Kelly. She dressed like this every day, and rode the subway downtown to work every morning.
What a classy era!