"I made a really big mistake and it's no one's fault but mine, and I have to suffer the consequences," she said.
Her father said on "GMA" that he was not completely surprised by what his daughter had done.
"I was surprised with the extent she had taken it, but not surprised with her doing it," Mike Kirilow said. "She's always manipulated people, manipulated situations to get what she wants. She's not one to work very hard. So to me it was just another way of her getting people's sympathy to help support her."
When he first learned from his daughter that she was faking cancer, he said he tried to get her to publicly admit the fraud herself.
"I gave her every option and every opportunity to come clean on her own, on her own terms," he said. "She clearly decided not to do that."
When she wouldn't, he said, he and his wife told some of the volunteers who had helped his daughter what they knew, and together they filed a report with the police.
"You feel ashamed," he said. "This is your child, so there's a lot of embarrassment.
"Her family loves her, we would love to support her, however we cannot," he said. "Due to past experiences, the amount of lies, and basically, the hell that she's put us through."
False cancer claims to scam money from unwitting donors are not uncommon.
On July 26th a Tennessee woman, 39-year-old Keele Maynor, was sentenced to 42 months in jail for stealing thousands of dollars in donations by claiming she had breast cancer.
"We tend to call these people pathological liars, but that doesn't really fit," psychologist Michael Bradley said. "The lies are a representation of their belief that their real life is not good enough."
On Facebook, people have reacted to the allegations against Ashley Kirilow with outrage and fury.
"The worst," said one posting.
"You disgust me," said another.
ABC News' Ron Claiborne contributed to this report.