Spike Buffy fic with Dawn opening portals

[spikereader.livejournal.com]

This one has been niggling at me for a while, but the annoying thing is that I can only remember the end. It was a fic I read years ago, might have been a completed fic with an unfinished sequel, or just an unfinished fic. Presumably after season 5 as they are finding out that Dawn still has key-like properties and can open portals - I have a feeling she opens one and ends up in a cupboard but that might be complete imagination on my part. Buffy and Spike are together.

The main bit I can remember which I think is right where it finished, is that Dawn has a boyfriend and Spike's warning her that they'd better not get up to anything in her room as he'd know from his sense of smell. Don't think the boyfriend's quite human,but they don't know that, and he's listening outside the window of Dawn's room. And there's possibly a mention of his grandmother.

It's quite possible I'm mixing up several fics here but if anyone has any ideas I'd appreciate it.