quick question

Do you know in the song "Seven Swans" by Sufjan Stevens the line "She took her purse to the bed"? Do you have a reading of that line? Erik has the idea that she (Mom) is taking her purse to the bed in order to kill herself--she's going to swallow some pills that are in the purse. He thinks this because "She took her purse to the bed" follows "My father burned into coal."

I think Erik is being really pessimistic about that line, but maybe he's right. I have no idea why she might be taking her purse to the bed. Maybe you have thought about this.