Place this clip right after the doubtful claim in your edit, before any response from the speaker. Follow it with a huh sound for confusion, or stack a wrong answer buzzer underneath when the lie is meant to fail publicly in the scene.
इस साउंड के बारे में
A very short spoken clip of the line 'I don't believe you' delivered in under a second. It lands as skeptical and a little hurt, the tone of someone who wants to believe but clearly does not, which makes the disbelief feel personal rather than angry or loud.