Elizabeth Edwards speaks about husband's affair

(Inside Edition)

Rielle Hunter and her child in New Jersey.

With her new book coming out this month, Elizabeth Edwards chose Oprah Winfrey's couch to speak in the most detail yet about the affair that almost certainly ruined her husband's political ambitions and nearly killed their marriage.

Seven months after withdrawing from the presidential race, John Edwards last August admitted the affair with former campaign videographer Rielle Hunter after the National Enquirer reported he was the father of Hunter's baby. He denied paternity and said the affair happened while his wife's cancer was in remission. Over the weekend, Edwards acknowledged there is a federal investigation of whether his campaign improperly gave money to Hunter.

In the interview to air Thursday on "The Oprah Winfrey Show," the talk show host says, "The other woman has a baby. And there is great speculation that your husband, John Edwards, is the father of that baby."
"That's what I understand," Elizabeth Edwards replies, according to a transcript provided by Winfrey's production company to the Associated Press and the New York Times. "I've seen a picture of the baby. I have no idea. It doesn’t look like my children, but I don’t have any idea.”

She also avoids a direct answer to whether she is still in love with her husband. "You know, that's a complicated question," she says.

When Winfrey asks, "Is it a day-by-day thing?" Edwards replied, "Neither one of us is out the door so I guess it's day by day, but maybe it's month by month."

In excerpts of her memoir -- "Resilience: Reflections on the Burdens and Gifts of Facing Life’s Adversities” -- posted on Time magazine's website, she says that her husband admitted at the end of 2006 -- soon after launching his second presidential campaign -- that he'd made a mistake with Hunter on a single night.

"More than a year later, I learned that he had allowed [the woman] into our lives and had not, even when he knew better, made her leave us alone," Edwards wrote, according to the excerpts. "I tried to get him to explain, but he did not know himself why he had allowed it to happen."

She told Winfrey that she asked her husband for one gift when they were married 31 years ago: "I wanted him to be faithful to me."

Meanwhile, Inside Edition tonight is airing what it says is the first video of Hunter and the baby, who the show says are now living in South Orange, N.J.

"She appears extremely thin in blue jeans, a scarf and purple sweater over a white collared shirt," the show said in a statement. "With her hair pulled back, Hunter looks like an everyday mom carefully tucking her daughter into a car seat in her BMW, still with North Carolina plates."