Video Shows Lori Vallow Saying She's a 'Ticking Time Bomb' While Competing in Tx. Beauty Pageant

Rexburg Police Department Joshua “J.J.” Vallow; Lori Vallow; Tylee Ryan

Years before Lori Vallow became the center of an investigation into the mysterious disappearances of her children, whose bodies were later found on her husband's property in 2020, she was an aspiring Mrs. Texas beauty queen.

During the 2004 pageant, the fit mother of two can be seen strutting across a stage in a teal blue bikini, looking over her shoulder to give the audience a flirty glance as she traipsed off.

In exclusive footage airing in a new, two-hour 20/20 special on ABC Friday at 9 p.m. ET, Vallow — then named Lori Ryan, because she was married at the time to third husband Joseph Ryan — is asked by the judges, "What makes you tick?"

RELATED: Lori Vallow Seemed Like 'Supermom' Before Kids Vanished and Were Later Found Dead, Says Friend

Wearing a demure black blazer with a pageant sash, Vallow cheerfully replies, "Being a good mom is very important to me and a good wife and a good worker. And being all those things is not easy!

"So I'm basically a 'ticking time bomb,'" she says with a laugh. (An exclusive clip of the 20/20 episode showing Vallow at the pageant is below.)

Idaho_Pageant_A1

Vallow pageant

Today, the self-described "ticking time bomb" sits behind bars in an Idaho jail on $1 million bond, facing multiple felony charges including felony child abandonment and solicitation of a crime in connection with the disappearance of her kids, Tylee Ryan, 17, and Joshua "J.J." Vallow in September 2019.

Dennis Fujimoto/AP/Shutterstock Lori Vallow

She was arrested in Hawaii in February 2020 after authorities gave her a five-day deadline the month before to produce the children and prove they were safe, which she failed to do.

RELATED:Lori Vallow, Husband Under Investigation for Possible Murder Charges as Her 2 Kids Remain Missing

In June 2020, the children's charred remains were found buried on Daybell's property in Idaho.

Eric Grossarth/ EastIdahoNews.com Chad Daybell, at left, and Lori Vallow

Vallow, who was already in custody, and Daybell, who was arrested in June 2020, were then both charged with conspiracy to commit alteration, destruction or concealment of evidence since prosecutors believe they knew where the children were buried, say prosecutors.

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Authorities are also investigating the deaths of two of Vallow's ex-husbands, Daybell's ex-wife and her brother, who was found dead under mysterious circumstances.

RELATED: FBI Now Investigating Death of Lori Vallow's Previous Husband, Which Was Ruled a Heart Attack

Mom of 2 Turned Chad Daybell 'Superfan'

Besides showing Vallow in the days before her life exploded into controversy, 20/20's year-long investigation spanning seven states goes in-depth into her shattered marriages, her ex-husband's deaths and her obsession with doomsday writer and self-proclaimed prophet Chad Daybell — who would become her fifth husband.

20/20 Co-anchor Amy Robach interviews a friend of Vallow's who talks about how Vallow became a "superfan" of Daybell's and his end-of-times ideology.

Robach also interviews Vallow's former in-laws, who discuss the changes they saw in her — and what they think went wrong.

Vallow and Daybell have both pleaded not guilty to all the charges they face. More charges could be pending. An attorney for Vallow and Daybell has not returned PEOPLE's calls for comment.

The couple has not been charged in connection with any of the deaths of their family members.

20/20 airs on Friday, February 26 (9:00 – 11:00 p.m. ET) on ABC.