In the clip that the singer uploaded to Instagram, Luca is holding a hose with a spray nozzle attached. "You can't spray me... suuuure," she captioned the video.
Fortunately for us, Luca figured out how to get the water going and Hilary's reaction was priceless. Also amazing: her dog Dubois who totally just sat there somehow knowing that he wasn't gonna get hosed (he was right).
Check out the clip above to see Hilary and her son having some summer fun.