Buffy is a strpper with a brother.

Buffy lives at home with Joyce (who is sick in this fic not dead) and her vrothers whose names is Hank jr. I believe they call him HJ or AJ.
Joyce works at a gallery with Synder as her rat boss.
That is really all I remember besides Spike meeting buffy at the strip club and coming to her apartment.

I think you're looking for

Siren's Song by Seredipity

http://www.sinister-attraction.net/stories/s/sirens.htm

Thank you, Thank you, Thank you, and once again thank you. That has been bugging me for weeks.