Willow aggressive spell induced comments to Xander

I just can't figure out which fic this is in. Willow does her delust spell at some point in the fic and it leaves her making very aggressive and snarky comments at Xander throughout and completely unprovoked, basically whenever she speaks to him. Such a small thing within a fic but it really made me laugh how it was written and I can't find it.

Beloved in Blood by Ameeya
http://www.athenewolfe.com/justrewards/viewstory.php?sid=345

Right!! That's it, I'm rereading that. It is one of my favourites but I keep forgetting bits that come from it so I quite clearly haven't read it recently enough!!

Thank you Frina