The Devil and the Deep Blue Sea

Can you touch the tag without being dispelled? Because if you can do so (or, for that matter, trick her into throwing it into the bonfire herself), you can burn it and the leaf up, making the whole thing moot.

Unless they're SUPPOSED to go in the bonfire, in which case the best course of action is probably just to be all "you have done me no wrong, so I shall do you no harm; I am a good spirit blah de bloo de blorp"