Songfacts®:

• Lambert co-wrote this song, which expands on her bad-girl streak (Exhibit A: "Crazy Ex-Girlfriend") with her boyfriend Blake Shelton. She said:
  
  "If Blake and I plan to co-write, it usually never works. We wind up getting bored or deciding to go drive back roads instead. But if we just happen upon it, something great comes out of it. This was late at night, and it was so cool because Blake put himself in a 25-year-old girl's place and wrote from my perspective.
  
  It's basically about cheating, love gone bad, and the death of something, whether it's love or a person—however you want to interpret it. My mom always says, never return evil for evil. So I kind of put that into my own words and wrote 'A Sin for a Sin.' Because drinking and digging a hole in return for cheating doesn't solve anything—but people do it!
  
  To me that's the song on my record that sounds most like 'Kerosene' and 'Crazy Ex-Girlfriend.' It's me in a nutshell. If people have never heard my music before, there's kind of a little theme going there. Nobody really gets to live out all their fantasies. I just get to sing mine in songs."