Place this clip right after the excuse line in your edit, then follow it with the Sudden Suspense sting before cutting to the reply. For a back-and-forth, let the accused answer, then close the sequence with No No Wait Wait.
About this sound
This short voice clip features a person asking why you lie to me, followed by a pointed hah laugh. The delivery turns a simple call-out into a teasing accusation, making it feel funny, awkward and instantly suspicious, like the speaker already knows the answer and is just waiting to watch the other person squirm.