Ashton Kutcher admits it wasn't easy warming up to Demi Moore's ex Bruce Willis.
"I just had to get over my ego, which was screaming, 'This guy used to sleep with your woman... And I listened instead to the little voice inside that was whispering, 'This guy loves and cares about your woman.'
"Once I did that, it was a cakewalk," he adds.
As for his relationship with Moore and Willis' kids Rumer, 19; Scout, 16; and Tallulah, 14 (who pose with their mom for the first time in the mag) Kutcher says, "I am eternally grateful for having them in my life."
The fact that the kids say they love and admire him as much as their biological dad, "makes me want to cry and hug them and cry a little bit more," adds Kutcher, who just celebrated his 30th birthday with an A-list birthday bash.
Moore, 45, says she is pleased Kutcher gets along with Willis, 52.
"Look, I'm the product of divorced parents, and my brother and I were the pawns in my parents' game," Moore says. "I never wanted that for my kids."
Even Tallulah weighs in on her mixed family.
"I love it," she says. "We are one big family. Late at night, after a long day, we can sit around and laugh with each other."
Look, I would be lying if I said I don't have moments of panic when I look in the mirror and see things creeping in that weren't there before," Moore, 45, tells Harper's Bazaar for its April issue, about getting older. "But now I stop, and instead of focusing on my flaws, I think about all that I have in my life."
Those rewards are not only tangible, she says, but human: "I have a wonderful marriage, I have three wonderful daughters, I have an incredible extended family, and I have loving, wonderful friends."
As a result, she says, "when I look back in the mirror, the reflection I see isn't so bad, because I'm seeing the beauty of my whole being and my whole life."
Moore admits, "I didn't bring somebody into their lives lightly. ... Being with me isn't about just being in a relationship with me; it's about someone stepping into a situation where there is already a huge level of responsibility."
And the age difference between them? "People made such a fuss about it, you would have thought the world had never seen it before," says Moore. "Age wasn't what I was thinking about, but to the rest of the world it was a very big deal."
Insofar as her initial reaction to Kutcher's being beside her mom, Tallulah says: "I was in fourth grade, so it didn't hit me as much as it did Scout and Rumer. But it still hit me a little, and it still does now. I find it weird that people think my stepdad is hot."
Scout also notices another change that overtook her mother - ever since Moore took up studying Kabbalah. "She has always moved from religion to religion according to the stages in her life," says the teen. "Kabbalah is the one she has stuck with the most. I respect that she and Ashton are doing it."