IIRC, the staff’s families also live in the Black Mesa Complex. If this is correct, if there could possibly be a child center that you perhaps pass by on the train in during Inbound, and have this tune barely audible on the train itself when you pass by the child center: https://www.youtube.com/watch?v=3N2k5gEgE2E
While this would be meant as a joke for the player, this a serious suggestion and not a joke thread. I always love discovering hidden bits of humor in games and that song barely audible–maybe even only in a specific spot on the train–would be a perfect example of that.