In case any Buffy fans missed the latest issue, which Joss Whedon says is cannon, here is the pic and his quote...
The New York Times published a picture of Buffy and Satsu naked in bed together where Buffy is seen saying; “Wow, that was … that was … Wow,” Satsu replies; “‘That was wow’ pretty much covers it.”
Whedon told the Times: “We had already established that there was this character, Satsu, was in love with Buffy and that Buffy was kind of lonesome. [We decided] it would be fun if they just went ahead and did it, rather than have it be a ‘will they won’t they’ situation.”
I'm SO proud of her. *sniff*
More here, http://www.mtv.com/movies/news/articles/1582835/story.jhtml and here, http://forum.newsarama.com/showthread.php?t=149216