The first paragraph is the best for me – the image you paint in those first two lines is truly phenomenal, loads of questions set up in such a short space…
In a way, it disappoints me that you answered at least the majority of them in that second paragraph – the situation seems a bit typical ‘domestic abuse, self defence’ stuff, where it could have been left open…
That said, you do ask yet more questions towards the end, even if it does feel a bit rushed…
What I think I’m trying to say is that I thought the opening was absolutely immense, and I think, at least for an opening story, you could have explored that picture, and the thoughts and feelings of your character in more detail, getting to the bigger plot later.
Paige Elizabeth 
Mostly Harmless