The demon scam

You look at her with desperation in your eyes, knowing she might very well be your only chance of survival in this place.

"Please..! I really need your help, or my sister and I will surely die here!"

The demon doesn't back down and she looks truly fearsome now with her ears flattened and her fangs bared. "I told you no! Don't test my patience, or I'll kill you on the spot!"