I can't be sure that i'm right either, but i thought it was pretty obvious that
he killed her in the end - compulsive destruction of *untainted* things that one came to care about seems like a serial killer's MO.
Comment?
Anyway, really nice one shot. Now gotta go and read "Voice Of Her Fingertips" from the same author, which i dismissed in the past because its description sounds like boring generic GL crap.
edit: ...and generic and boring it was, but whatever - i guess each genre has its own limitations, and there's only so much author can do with about 30 pages.