Nicole Kidman hopes ‘Babygirl’ proves to be a “liberating story” for women. The Oscar-winning actress stars in the new erotic thriller film, and Nicole has admitted that she found making the movie to be a “very freeing” experience. Nicole, 57 – who is married to music star Keith Urban – said at the Venice Film Festival: “This is one woman’s story and this is, I hope, a very liberating story. “It’s told by a woman, through her gaze – Halina [Reijn] wrote it and she directed it – and that’s to me what made it so unique because suddenly I was going to be in the hands of a woman with this material…