After 10 years, Mackenzie finally put a stop to this forbidden, incestuous relationship after she became pregnant for the second time. This time, she says she didn't know who the baby's father was—her boyfriend or her father.

"I had an abortion," she says. "And I never let [my father] touch me again."

Mackenzie says John knew it could be his child, so he paid for the abortion.

"It was one of those moments where you're either going to live or die," she says. "I don't mean death. I mean, wake up dead. Dead to feeling. Dead to reality."