Place it right after the surprising mom line in your edit, then follow it with Oh My God Wow for a bigger reaction before ending on Nelson's Ha-Ha for a light payoff.
关于此声音
This is a very short voice clip of someone blurting out 'What the heck, mom?' in a startled, exasperated tone, as if caught off guard by something a mother has just said or done. It lands as funny, awkward disbelief rather than anger, the kind of instant reaction that makes a surprising family moment feel even sillier.