Buffy & Riley have a fight says no such thing as true love, buffy ends up in Spikes bed in brazil

Hey guys,
Looking for another fiction if you could please help me?

Buffy & Riley have a fight one says no such thing as true love, Buffy ends up in Spikes bed in Brazil. I think it was the PTB or because shes on the Hellmouth but they (Spike & Buffy) don't know how she got there, she rings Giles and he asks if shes with a guy and he explains it's her true love which Willow and Tara figured out. Angel is upset because he thinks he is her true love. Spike drives Buffy back to Sunnydale.
Does anyone remember this fiction please?

That sounds exactly like "It Started With Sex" by Kari Mouke.

Summary: It all started with sex. Riley did it badly. He knew it. They argued. Supposedly about Angel. Buffy said something she shouldn't. Not being who she was. Not being over a Hellmouth. Poof. Sex. Really, really good sex. NC17. Hard Spuffy. Season four. No Chip. Spike never returned to Sunnydale after Lover's Walk.

Don't have a link, sorry.

It all started with sex

That is the only link I have to that story....

drknit
Thank you so much