Buffy singing to a sick Spike

[uri6.livejournal.com]

Hello guys,

does anybody remember a fic where Spike is very sick and, while sitting by his bedside, Buffy sings to him " You are my sunshine" to convey how much he means to her? I also  remember she was really scared she was going to loose him. 

The general situation is the following (but I may be mixing 2 or more  fics):
I think Spike is poisoned , Buffy tries to cure him by giving him her blood, but it actually makes him worse because there is also a spell or something on him. So nothing seems to help and that's why she is so desperate and doesn't want to leave his bedside (I remember somebody thinking/saying she looked really exhausted)

It's probably set post Chosen or post NFA because I remember Angel or somebody from the AI crew being there (maybe it was him/they who called Buffy?).

I'm quite sure this fic is at least 3 years old, and, for some reason, I keep thinking it could be by Kantayra (but I don't have a link to her anymore), but probably I'm wrong.

Thanks to all those who answer!