While promoting his upcoming tour and album, Standing Room Only, Tim McGraw revealed what song makes him think of his wife of 27 years, Faith Hill. "Well, there's one song and it's really an instrumental, but there's one. I’m probably going to get in trouble for saying this. God, please forgive me, baby," he told Yahoo Entertainment, referring to his wife. "It’s ‘Samba Pa Ti' by Santana. It's kind of our song." McGraw revealed that his uncle first showed him the song, telling him to save it for a special time. "My uncle told me one time — my uncle Hank, old hippie who lives in Napa Valley — he played it for me one time years ago on the road. He loved that song too. He said, ‘I'm going to tell you something.’ He says, ‘Never make love to a woman with this song on unless you intend to marry her.’ And so I didn't until I did. And then I did," McGraw explained.

McGraw and Hill have been married for over two decades and share three daughters together: Gracie, 26, Maggie, 24, and Audrey 21. "We always like to say we've been married 92 years in showbiz language; it’s like dog years," said McGraw. The country star admitted that it was really tough at first after their daughters moved out, leaving McGraw and Hill as empty nesters. "It was tough at first, like the first six months. I think it's always harder on mom when the girls go away," McGraw said. Although it was tough at the beginning when their girls moved out, McGraw said that the pair finally has time for just themselves, saying they are in their "second honeymoon" phase. "It was pretty tough because it was empty and the energy of the house was sort of gone. … After about six months, we sort of thought, when we got married, we had a kid right away — we had Gracie right away. And now we kind of … have our time to ourselves, and it's kind of honeymoon time again. So, we’ve quite enjoyed it."

With McGraw's upcoming album "Standing Room Only" set to come out soon, the singer explained the inspiration for one of the songs on the record called "Nashville CA/L.A. Tennessee," saying his eldest daughter Gracie inspired the song. “It came out of loading up my Cadillac Escalade, my 19-year-old Cadillac Escalade, taking all the seats out of it, loading all of her stuff in, and her and I doing a solo cross-country trip together to move her to L.A.,” McGraw recalled. “We had a great time on the trip, singing songs and playing music and stopping at cool places and spending time together. And then when I got [to Los Angeles], it was late at night and she was so ready to be here and so ready to get rid of Dad by that point! I unloaded all the stuff to where she was living, and she was like, ‘All right, Dad, I'm fine now! You can go.’ And I kept lingering around, kept trying to move things around, trying to keep as much time with her as I could. And she finally gave me a big hug and says, ‘OK, Dad, I need you to go now!’ And then I just broke down and just started crying. … So, that song was born out of that road trip.”