The context of the following conversation is Kai put confetti and streamers all over the house. Kai played a prank on their parents.:
Kai says Wow, this is so cool. They will be shocked..
The friend responds But Kai, it may not be so funny, confetti is hard  to clean up..
Kai responds My parents will love it. Trust me!.
The friend responds You mean, they won't trust you being at home alone..
Kai responds Lighten up bro. Adults need a little fun in their lives too..
The friend responds Maybe you should have a real party for them instead of a prank..