You've probably got a lot of responses like this . . . but I really quite liked this story, despite the infidelity, which is not something I normally appreciate. Your writing is simply beautiful - and although it's hard to see why Snape would choose to cheat in the first place (one would think happiness would be more precious to someone who seems to have had so little, and that he would endeavor to protect it, not jeopardize it) - it's still a beautiful piece. Lots of emotion packed into such a small space. Great job!