Donald Cline ran a fertility clinic near Indianapolis from 1979 – 2009. Reportedly, upward of 70 of the women he had helped to conceive were unknowingly impregnated with his specimen. Years later, some of those women’s children began to take DNA tests, and to connect with their half-siblings online.

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“I completely lost my identity,” says Julie of the moment she learned she was the former fertility doctor’s biological daughter. Her mother, Dianna, says Cline was supposed to have used her husband’s sperm to inseminate her but used his own instead.

WATCH: Former Fertility Doc Quotes Bible Verse When Confronted By Children Conceived With His Sperm

Dianna says that when she broke the news to her husband, he was devastated, saying, “This has taken everything away from me.”

Does Julie say she feels any differently today about the man who raised her than she did before knowing they weren’t blood relatives?

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