For Underwood, kids will have to wait

"To be honest, one day I'm absolutely fine and happy and, you know, start legitimately thinking about the idea of having kids, and another day, I'm like 'oh gosh, no, no, what?' I can barely keep my own schedule straight. I see moms who are wives, who work and juggle all these things, and how they must be better time managers than I am," said Underwood.

The singer, whose new disc, "Blown Away," comes out next Tuesday, married pro hockey player Mike Fisher in 2010.

"Right now in my life, I'm smart enough to know that I'm a selfish person right now, and I can be, and that's okay," Underwood says. "There's nothing wrong with that. At least I recognize it."

"That's a big step," she said. "It's like moving away from home. It's really scary until you do it, and then you figure it out," the singer added.

Fischer plays for the local Nashville Predators. But the two go stretches without seeing each other. The idea of straying doesn't worry Underwood. "I know he loves me, and I know he loves God. And he wouldn't do that to either one of us," she said. "Every guy I've ever dated before Mike, somewhere in the back of my head, I would always, not have trust issues, I've never been the kind of the person to check text messages...bust into his email account. With Mike, it never crosses my mind."

Underwood talked about the new disc in the interview including the song Forever Changed. Underwood described the song as being about a woman, who is married with children, coming to the end of her life. One of the writers wrote the song about his mother who had Alzheimer's, but Underwood said she thinks of her grandmother's death.

"I get emotional even talking about this song to be honest. It's just beautiful," Underwood said. "It just becomes very real...and I remember my grandmother at the end of her life, looking at my dad and thinking that that was my grandfather."

"I can never sing this song, like on stage in front of people. I could barely get through it in the studio," she said.