Just did this quest yesterday. There was a tiny bit of reversion from what I remember (like one second of wings shrinking). I cured her, but the entire time I'm thinking:
1 - This really isn't that bad as far as curses go (remember the spoon lady? Holy fuck.)
2 - She's hot.
3 - Really wish her mom would've wished for her child to be able to run as fast as a wolf ...