The 52-year-old actress has been married to the country music singer since 2006, and the pair still have a great sex life. Keith opened up about their bedroom antics in his track "Gemini", in which he sings lyrics including "she's a maniac in the bed, but a brainiac in the head," and "Big Little Lies" star Nicole admitted his confession left her somewhat red-faced.
"I don't sensor his art, but it is a little embarrassing," Nicole laughed during an interview on Australia's KIIS FM's "The Kyle & Jackie O Show" on Monday, July 22. "It's better than saying 'God, I'm so bored. Make an effort, Nicole!'"
Another line in the song sees Keith sing, "She's waking to make love in the middle of the night."
But when the show's co-host Kyle Sandilands questioned Nicole as to whether that lyric was true to life, Nicole refused to answer - and instead laughed it off.
"No, what?! You're making that up, Kyle. Shut up. I'm not answering that, that's outrageous," she giggled.
Nicole has enjoyed huge success recently with U.S. TV show "Big Little Lies", in which she plays domestic abuse victim Celeste Wright. The second season of the programme came to an end in America on Sunday night, but the Australian actress admitted she'd be keen to reprise the role for a third series if possible.
"I think we would love to do a season three because there is certainly ideas," she told News Corp Australia, but added, "But we would not do it without all of the same people involved... even the kids."