In that situation, don't refer to it as a "burner". Using that word is automatically suspect. Keep in mind that they hear plenty of stories like this. What it

In that situation, don't refer to it as a "burner". Using that word is automatically suspect. Keep in mind that they hear plenty of stories like this. What it amounts to is that you're trying to achieve plausible deniability even if they assume you're lying, i.e. don't give them any concrete basis for suspicion.