The witch leads you through the forest to the edge of the hot spring. The warm, moist air blowing off the water makes you think of... a stomach. How appropriate.
A single path of rock leads down the center of the hot-springs and trails off into the mist. Faint singing and giggling echoes off the rocks. You can see shapes moving there, female shapes.
The witch beckons you. "Well, let's get going. There are many hungry Sirens who would like to meet you."
As the witch leads you down the path, you hear a giggle from behind your right shoulder.