At some point, she becomes aware that Coulson is in a coma in medical, and never gets any visitors. So she goes by and says she's his niece, and leaves him flowers and her iPod while she working. I think.
That's all I've got. I have no idea if there's a pairing in this one, or if it was finished. It almost has to be on AO3, but searches for "niece" aren't getting me anywhere.
I accidentally deleted the comment of the person who found it (why is there no undo?), but it's:
I'm Gonna Be A Part Of It (Whether I Want To Or Not)