The singer poked fun at her beau during a day at the beach.
The couple is lounging at the beach in the clip, with Asghari opting to take a nap in the sand and using a T-shirt over his eyes to block out the light.
"OK, so my boyfriend has no idea that I'm filming him right now," Spears whispers, before turning the camera on Asghari as she touches his lips with a water bottle.
Spears giggles during her prank, causing Asghari to briefly wake up with a smile and a laugh.
"The key to a happy relationship is to be annoying as hell ?♀️???!!!!" Spears quipped in the caption.
The post comes shortly after Spears shared pics of herself getting "carried away" with henna tattoos all over her body. In one shot, Spears showed of the white ink covering her chest, stomach and legs while wearing a snakeskin bikini.
Watch the video below for more on Spears.