learning to distrust elderly women

"This is chocolate!" gasped Hansel as he broke a lump of plaster from the wall. "And this is icing!" exclaimed Gretel, putting another piece of wall in her mouth. Starving but delighted, the children began to eat pieces of candy broken off the cottage.
They were just about to try a piece of the biscuit door when it quietly swung open. "Well, well!" said an old woman, peering out with a crafty look. "And haven't you children a sweet tooth?"