It a very calm slow song, like a love song, I really liked it.. It plays twice during the episode from Nov. 17, it plays when they are in the apartment and a second time when Delinda calls her boyfriend while he is doing an investigation to figure out who stole the violin and who broke into his safe at the Montecino.. The song starts playing when she calls I believe its the ringtone that he assigned for her for when she calls him, well the song starts playing and everyone who is at the auction turns back and looks at him because its a little loud(well I think thats why they look back at him).