A co-worker of mine used to be an over-the-road truck driver here in the US (meaning you would make deliveries over several days, typically across several states), and he told me one story not unlike this. So at truck stops, they have prostitutes there because driving a long, hard, lonely job, and they're called "lot lizards". He recalled one time a woman came up to him in his truck and offered her daughter's services as well - the girl was something like 13, as I recall, and clearly did not want to be there or involved with this shit. He refused and she left to go to other drivers.
He told me that was the only time he ever called the law on someone at a truck stop; he called the cops and let them know what was going on. I forget how the story ended - I dunno if they caught her or what. But it's so massively immoral and so...counter to basic parental instincts that seem to be built into human beings that I wonder how far down into hell you have to fall to reach a place like that.
That is completely fucked up.