You were a nymph. Circe offered to let you stay at her house and protect you from men. But she didn't mention that one was staying the night

As you walked around at night, looking for water, you heard a man's voice from a room, talking to himself. You took a dagger and were going to attack him, thinking it was an intruder. But, instead, you saw Hermes himself, in front of a mirror, unaware of your presence

"So... do you come here often, pretty boy~?" he continued talking to the mirror