For her, to love is to hurt, to accept death and eventually destroy. So, in the end, she will need a new love in that sac

The most interesting thing for me was that we've actually seen only glimpses of what was she really like. For the most part we saw his perception of her, his projections, be it his wish or fear. In the first part of the film, we see what is the perfect woman for this lonely, middle aged widower supposed to be - she's young, beautiful, always dressed in white (innocent, pure), obedient, but also mature, insightful with some deep thoughts about accepting death (wow) that he can relate to. And towards the end we see the evil woman who wants to entrap him with her love, to hurt him and strip away his whole being. I think he's afraid that he might love it . But, now seriously, his nightmare really began after the night they spent together or, as implied, he's still in that bed with her, having a nightmare, just after he proposed her and she revealed him some abuse in the past and the need to be loved unconditionally. He was scared ****less, talk about over the top fear. In the end, when she speaks to him, with her neck broken, that's when we hear a poor little girl that just wanted to be loved.