ariadneelda pointed me to this since I've been absent for the past months and thus missed it - and boy am I glad I got to read this. I love the backward timeline, which always strikes me as a stylistic element with which interesting things can be done, if you know how to do it. The story unfolds fluently and, I think, could be read in any order without really confusing things. Still I think if this had been told forward, something would have been taken away from the atmosphere. It feels tragic, but the tragedy seems to have less impact because we descend from it, kind of. You tell their story very matter of fact, and that seems, above everything, so very fitting. I've no idea if that makes sense? Heh.
Anyway. I've always loved your Fleur, and what you do with her here is magnificent. The way she uses her magic, how it brings her together with Severus, how strong and independent and persistent she is - yes. That's how she's got to be, isn't it? She does what she feels she needs to do despite any personal afflictions. Someone on LJ said you write her like a young, beautiful Snape, and that rings very true to me, somehow.
This is one of the pairings I've desired to read for quite some time, and I am so glad you got inspired to write them. Gorgeous work.