Sister Song Lyrics

Lyric discussion by Jenezzy 

Cover art for Sister Song lyrics by Perfume Genius

My interpretation is that the singer is dying or dead and is singing to some family member to keep on going until he/she comes back to them (his/her sister and the singer) at the end of her life.

I don't know what the emphasis on the sister is all about. Perhaps I'm missing something?

My Interpretation