A construction site is a construction site! The boss was young, short and blond, and the workers were all big blacks, with all that goes with it. I am not surprised that being alone all day in the office, this girl just got bored. Watching from the window, on the sweaty, muscular men, by the end of the day she just "
I take it this is one of the varieties of the ride around town. Guys offer bored ladies a ride around town in a car, and the ladies thank the guys for it this way. In this case, it turned into a threesome.