Keith Papini is still processing that his ex-wife, Sherri Papini , staged her own abduction.

Nearly eight years after Sherri famously vanished during a jog , only to reappear after supposedly escaping a three-week abduction, Keith is speaking for the first time since her arrest.

Keith told ABC News that Sherri never apologized to him or their two children for the excruciating ordeal, which continued for another six years before she admitted she had fabricated the kidnapping.

She made us all believe that her story was true. Every single day she committed to the lie, he said in the interview that aired on Good Morning America Monday.

Keith called 911 to report Sherris disappearance when she went missing from their Redding, California, home in early November 2016. He was the first person to be questioned by authorities and passed a related polygraph test.

The nationwide search for Sherri ended on Thanksgiving Day when she was found bruised, shackled and branded on a highway outside town. Keith, who believed her claim that two Hispanic women had abducted her, told 20/20 through tears at the time: She literally lived through hell.

When I pulled back the curtain and I saw her and I saw the look in her eyes, I felt, in that moment, that she was lying, he told ABC News when asked about his reaction to seeing her in the hospital right after she was found. He added that only the extent of her injuries made him think, How horrible of me to even think that she couldve done this to herself.

Her safe return proved far from a happy ending, however, as authorities were still searching for her supposed captors. Sherri maintained the charade by having Keith install new doors, locks, lights and cameras at their house to protect their family.

The amount of fear that our family lived in, that was fake, is excruciating, Keith said. Those fears took six years to be proved baseless.