Relationship status: It's complicated

Asked if she is still in love with her husband, Elizabeth Edwards told Oprah Winfrey "that's a complicated question."

And when Winfrey asked about marriage, Edwards said, "Neither one of us is out the door so I guess it's day by day, but maybe it's month-by-month."

Edwards' appearance on Oprah Thursday marks her most extensive public comments since former Democratic presidential candidate and U.S. Sen. John Edwards acknowledged an affair last summer, Jim Morrill reports.

Winfrey interviewed both Edwards at their sprawling, 28,000-foot Chapel Hill home. Her publicists released a partial transcript Tuesday of what they called "a no-holds-barred conversation, where no topic is off limits."

More after the jump.

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Edwards also talked about the child of her husband's mistress and her own struggle with terminal cancer. The broadcast airs Thursday.

It will come a day before the release of Elizabeth Edwards' new book, "Resilience," in which she describes her reaction to her husband's admission of an affair with former campaign worker Rielle Hunter.

"I cried and screamed," she wrote. "I went to the bathroom and threw up."

In the TV interview, Elizabeth Edwards told Winfrey that she'd only asked her husband for one gift when they married 31 years ago.

"What was that?" Winfrey asked.

"I wanted him to be faithful to me," Edwards replied. "It was enormously important to me."

The two also discussed Hunter's year-old daughter, Frances Quinn Hunter.

"There is great speculation that your husband John Edwards is the father of that baby," Winfrey said.

"That’s what I understand," Edwards replied. "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."

John Edwards has denied he’s the father. A former campaign aide, Andrew Young, has said he is.

Elizabeth Edwards, whose oldest son died at 16 and who is fighting terminal cancer, was asked about her mortality.

"It's not as frightening," she said. "If there's an ever after — please, please, please — I would be leaving part of my family, but I can … join another party, and wait for that day when we're all together again. In some ways it's something you yearn for."