Rob Kardashian might be in BIG trouble with Blac Chyna!

In a new Snapchat video, the new daddy is seen throwing a huge stack of money at Chyna's face — but it was all in good fun!

MORE: Tristan Thompson Fears Khloé Kardashian Is Going to Leave Him for Lamar Odom (REPORT)

Before turning the camera to his fiancée, he said, "Chyna's about to be so mad at me."

https://www.instagram.com/p/BOBwi2-hE91/

The camera then turns to Chy, who immediately gets slapped with the money. Luckily for Rob, he anticipated her reaction. "Why would you do that?!" she replied while shuffling the money on their couch.

MORE: Kourtney Kardashian and Scott Disick's Son Mason Disick Celebrates His 7th Birthday

The couple has been flaunting their wealth more than ever following the birth of their daughter Dream, but they seemingly forgot Kim Kardashian was robbed in Paris after showcasing her glitzy possessions.

Learn from your big sis, Rob!