Spike won't kill Drusilla for Buffy

Hi guys!

Looking for a story where Buffy suggests that Spike kills Drusilla because she won't be expecting it, but he doesn't want to do it.
I think the fight is in LA because Cordelia is the one that tells Spike that Buffy is going after them (maybe Angelus or Darla?) alone, I think that Buffy could be pregnant in this one. I'm not sure.

~ Serena

That sounds alot like the later part of Whispers in the dark by ashlee

I hope thats it

Weber

Yeah, that's it! Thank you!!!