Rusalki - Erotic Short Story

Hadn't Kazimiera heard that it was dangerous to give away your name to unfamiliar and undressed women? On her way through the forest, Kazimiera comes upon a clearing. A beautiful woman, wearing nothing other than the flaming waves of her hair, brushing against her naked skin, is floating in a stream. Kazimiera is drawn to her, but her village's many stories about strange, dangerous beings enticing lonely wanderers with their wet hair and moist lips, keep nagging at her.
Who is the woman, and what is she going to do to Kazimiera?