Katherine Heigl: Why I Adopted Before Having "Biological Children"

One of Katherine Heigl's many surprises of parenthood? Watching her husband Josh Kelley become a hands-on dad to adopted daughter Naleigh, 22 months.

"He's a great dad. I didn't expect it," Heigl, 31, admits of singer Kelley, 30, in the November issue of Redbook magazine.

"He's such a guy," the Life As We Know It star explains of her spouse of nearly three years. "I adore him, I can't imagine being with another man, but he can be very self-absorbed."

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Ouch! Heigl clarifies: "Not in an egomaniacal way, just kind of in his own head and unfocused on anything other than his own stuff. So I was really surprised by how on top of it and how connected he is."

As for baby number two, the couple may indeed adopt again. "We still talk about having biological children as well. I'm not ruling anything out," she says. But, she explains, "adoption has been a part of my life and a part of my family, so it was how I wanted to start."

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(Before the actress was born, her parents adopted her older sister Meg in South Korea -- Naleigh's native country.)

Naleigh's adoption came through just as Heigl began filming Life As We Know It with Josh Duhamel. The time was "a complete blur," she says. "I had just become a mom....I was all over the place. I was really trying too hard. I was completely bonkers."

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"If I spread myself too thin," she adds, "I'm not a good actor, I'm not a good mother, and I'm just really high-strung-—and everybody hates me."

The November issue of Redbook hits newsstands October 19.