Roxy Jacenko breaks down in tears over past marriage troubles with Oliver Curtis

Roxy Jacenko and her husband Oliver Curtis will address their private struggles on this week's episode of Sunday Night.

According to a preview clip released on Tuesday night, a voice over narration concludes, "for the first time, their explosive marriage will be laid bare." Both Jacenko and Curtis are seen teary-eyed in the clip as they are interviewed by Melissa Doyle. The interview appears to focus on the tumultuous period where former investment banker Curtis was convicted and jailed for insider trading in 2017.

His absence left PR Queen Jacenko to hold things together for their two children, daughter Pixie, 6, and son Hunter, 4.

"Have you forgiven each other?" asked Doyle.

"I had to lie," the publicist said. She also touched on some darker periods, adding, "I started living a life as soon as Ollie went to jail that was fast," Jacenko admitted in to clip.

She also said, "I indulged in things I shouldn't have indulged in," perhaps referencing that while Curtis was jailed, she was photographed kissing ex-boyfriend Nabil Gazal on a balcony.

In a even more shocking admission, Jacenko revealed that she blamed her husband for her breast cancer diagnosis, which came one month into his jail sentence.

"I told him, 'It's your fault. You gave me cancer,'" she said in the teaser.

WATCH: Roxy Jacenko diagnosed with breast cancer (Post continues.)

However, the couple's bond has healed, appearing strong as ever since Curtis' release.

Roxy regularly shares their family travels on her popular Instagram feed.