At first I actually thought this song was about Kurt and a relationship he had with a girl. It was a bad relationship he felt he could not leave, kind of being trapped in it. "Black windows of paint, I scratched with my nails"

I got this imagine of him being trapped in a dark room where she would occasionally bring him food when he was tired as a way of keeping him alive or something. Now I look at it differently, as he says a maternal love, meaning his mother. He is one of my favorite lyricists and I miss him.