Wow! Beautiful ending! Now, I usually hate superpower/superhero stories but this one has a sort of relatable undertone. Just a girl trying to provide for her family. I think it would be nice if you added like a romantic twist. The girl falls in love with her kidnapper. They have sexual relations. That sort of thing. It was very good so far! My only complaint would have to be the selling and grammatical errors. Get those fixed and you're good to go!