Little boy went around tricking people out of their money, but got hit with a big surprise

Two boys were talking and the one said to the other, "There is an easy way to get what you want."

"How?" Matty asked.

Petey replied, "Tell people you know their secret." 

Later that day, Matty said to his dad, "I know your secret!" 

"Please don't tell your mom," the dad begged. "Here's $10." 

Overjoyed, Matty then went to his mom and repeated, "I know your secret!"

"Please don't tell your dad," pleaded his mom. "Here's $15."

Finally the boy decided to try it on the mailman. "I know your secret!" 

The mailman smiled wide, opened his arms, and said, "Come, give your dad a hug!"