I think this song is about an abusive ex trying to get back into her life, trying to ask for forgiveness and come into her "house of mercy" but she knows he won't change, he's only going to make her life more miserable, so she's made up her mind and shuts him out of her life completely.
I think this song is about an abusive ex trying to get back into her life, trying to ask for forgiveness and come into her "house of mercy" but she knows he won't change, he's only going to make her life more miserable, so she's made up her mind and shuts him out of her life completely.