KC takes a trip to Austin with her best friend, Emma. While there, they go out dancing. KC undergoes a pivotal shift as she watches Emma dance with her ex-girlfriend. Crazy, by Patsy Cline, is the song they dance to. Song #5 is Crazy by Patsy Cline.
KC, the main character in Love & Devotion, is kind of a dumbass. At the onset of the story, she's having an affair with a woman who is both married and old enough to be her mother. That's a painful proposition no matter how you slice it. Song #4 is Stay by Sugarland.