The Accidental Husband (2008)

New York firefighter Patrick Sullivan had no idea his seemingly idyllic life was about to go up in smoke--especially as the unwitting, second-hand recipient of advice from famed love expert and radio host Dr. Emma Lloyd. One day he is a happy, go-lucky guy looking forward to a life with his soon-to-be-bride. The next thing you know, his fiancee Sophia is seeking couples counseling on the radio from Dr. Lloyd. The no-nonsense, ever practical Dr. Lloyd questions Sophia's concept of romantic love and advises her to break their engagement, which she swiftly does. But, when Patrick and his computer-savvy neighbor decide to give Dr. Lloyd a taste of her own medicine and "accidentally" join them in holy matrimony--something that doesn't go over too well with her fiancee--it isn't long before they learn that sometimes even an expert in love needs a second opinion.