Buffy & Spike Siblings with Joyce & Giles as parents, log cabin

I'm looking for a fic I read a while back - thought I had it saved on my laptop, but I don't.

Buffy and Spike are (step) siblings and Joyce & Giles are their parents. The 4 of them end up going to a cabin for the holidays, and during this time Buffy and Spike try to fight their attraction, but end up giving in.

Buffy and Spike have ajoining bedrooms and I specifically remember a scene where Giles says he was kept up late with weird noises and Spike says it was the racoons outside - but really it was him and Buffy.

Anyone?

A Touch of Jealousy by Echidna . You can find it here : http://offline.buffy.cd/www.sinister-attraction.org/stories/e/touchof.htm

This is Touch of Jealousy however Spike and Buffy are not siblings. As I recall and I do because this is the first Spuffy fic I ever read and it is what inspired The Spuffy Realm Buffy and Spike are in relationships with Angel and Dru...Angel and Dru cheat with each other/start dating and Buffy/Spike hatch a plan to get even by pretending that they're a couple which leads to awesome Spuffiness...The Joyce/Giles thing does happen and they all do spend the holiday in a cabin.

It's also on our site: Touch Of Jealousy by Enchidna

Ok moving this one.