The clearly-annoyed star yelled "Sean Preston" while the youngster laughed.
Britney captioned the video post: "My damn kids".
The Piece of Me hitmaker - who has both boys with her ex-husband Kevin Federline - recently admitted her oldest son thinks he is "much more clever" than she is and won't let her help him with his homework.
She said: "I sit and do drawings with Jayden - he's really good at it and I'm horrible. I do his homework with him, too, which I love.
"Jayden lets me help him, which Sean Preston never will. He's such a smarty-pants and thinks he's so much more clever than me. I let him think that, but he is actually pretty cool."
And the 34-year-old singer has had her musical horizons broadened by her oldest son too.
She said: "We talk a lot about music. He's introduced me to some great people like Calvin Harris and Skrillex. If you listen, kids can teach you so much."