The waitress, known only as Brandi, had been talking about not seeing her child and was overheard by one her customers.
Rather than saying anything at the time, the customer just paid the $9.34 bill - and added an incredible $200 (£130) gratuity.
The anonymous customer wrote: "Brandi, thank you for your service. I overheard you talking about your son. Use this and visit him."
How lovely is that?!
Brandi was quoted by Mail Online, saying: "I completely broke down in the kitchen when the host brought this to show me. Kind and caring people do still exist."
We hope she enjoys seeing her son!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!