The story is about a husband and wife who pursue a music career/are in a band and the wife has an affair with a band member. The husband gets revenge, creates his own record label, and starts a relationship with his secretary. I remember the ending part being a first-person POV with the wife as she gets the door slammed in her face and when she returns to her car, she says, “Thats going to take some therapy” or something along those lines. Thanks for helping!