Cheapskate Clients
The OP thought they were babysitting the child of a regular family. From what they understood, the dad worked a government job while the mom was a number-cruncher at a local hospital. They were raking in decent amounts of dough, but that was only half the picture.
It turned out that they were actually rolling in money because the dad moonlighted as an illegal poker club owner. The child was actually the one who spilled the beans on their parents, which just goes to show how much (or how little) we should share with our kids. But that wasn’t the worst part! As a poker club owner, they could’ve afforded to pay the OP double their rate!