Spike finds spoilers for the show while using Willow's computer

Spike is using Willow's computer and somehow access transcripts of the series, they are able to use them to change a things in the series. At some point Xander starts complaining about Spuffy getting together and Giles rips him a new one calling him out about not telling Buffy the truth about Willow trying to re-ensoul Angel.

Could be Spike and Buffy, Lost in Cyberspace by Anne Rose? I'm on my phone and can't do links at the moment, sorry.

YES!! That's it, once I had a name it took less than a minute to find, but I've been using search terms and vague keywords for days with no luck.