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I love your use of description, and you really have a way of making your characters seem like real people. The plot is really good, and you use suspense nicely to keep the reader interested. Nice job with all of this.
I think it would be helpful for you to use names instead of just saying "he" and "she" all the time. While pronouns are great in addition to a name and title, alone they're really confusing.
:) nice work