The 30-year-old broke down when questioned about the fake pregnancies which had the DS (directing staff) branding her a "con woman".
"She's apparently used 10 known aliases, false cancer treatment... digitally altered photos of herself to appear pregnant," the DS said as they read about her past before starting the interrogation.
When she sat down with the DS, they told her "the best baseline to start with is honesty, integrity and truth".
Arabella spoke about her relationship with Josh and the "scrutiny" she received since their split late last year.
The pair met on Instagram in December 2018 and had a one-night-stand, after which Arabella claimed she was pregnant with twins.
Later, she told him she'd miscarried, but claimed once more in March 2019 she had miscarried again.
She claimed she was pregnant in June, going so far as to send Josh a 12-week scan.
After being questioned on the fake pregnancies, Arabella said, "I told my partner that I had a pregnancy scare, and I showed it to him and said it was ours, when in fact, it wasn't our scan at all."
When asked why she lied, Arabella said it was because the relationship was "coming to an end".
"I didn't know how to deal with losing someone," she admitted.
The DS asked whether her plan was to "cheat the person into staying with you", to which she responded she just wanted "to try and draw him back in".
She began crying uncontrollably and said she "hates" speaking about the scandal.
The DS told her she'd never move forward with her life if she couldn't be honest and had her escorted back to camp.
Arabella then claimed her lie wasn't so bad and it didn't "hurt anyone".
"I have told a lie, but the way that I see it, a little white lie here or there is not going to hurt anyone."
After the interrogation, Arabella decided enough was enough and she wanted to leave the show.
"I've had to survive, I've had to make mistakes along the way to realise, 'Okay, you know what, you can't do that in life.'"
"But, it is what it is, I can't take it back. It's just a matter of moving forward now," she said.
Social media slams Arabella
Social media users were left unimpressed with one user writing, "Arabella Del Busso on SAS Australia said she faked the pregnancies to keep the relationship going.
"Yeah well why did you make false domestic allegations then????
"Also telling someone seriously you're pregnant isn't just a white lie. Just f**k off."
Another said, "Faking a pregnancy to trick your partner into staying with you isn’t a’ little lie ‘- especially if you go so far as to do fake scans."
"Why was Arabella allowed on the show at all? That departure was just embarrassing," someone else added.
"Arabella, faking pregnancy, cancer, domestic violence, saying your mums dead, isn't a 'white lie'. You have some serious issues," one user said.
Another angry Twitter user wrote, "Also f**k Arabella Del Busso for not only what she put Josh Reynolds through but for painting herself as the victim on channel 7 SAS. HOLD HER ACCOUNTABLE!"
Someone else agreed, "'A little white lie here and there won't hurt anyone' HAHAHAHAHA Arabella Del Busso. You're a fkd up individual."
Josh Reynolds reacts
Josh took to his private Instagram account after the show aired wrote on his Stories, "White lies are sweet, right?"
The NRL star was initially concerned about having children with a woman he'd only just met and wasn't in a relationship with, but quickly became excited at the idea of becoming a father.
"When I got over the first period of shock natural instincts kicked in," he told 9 News last year.
However, he soon became suspicious when he never saw any ultrasound pictures, "Every time there was a scan, there was always an excuse. I was going, 'You can't find a baby scan, the photos? This is a bit fishy.'"
After hearing of the miscarriage, Josh believed her.
"At that stage I was so into this whole relationship/baby thing. I was hurting so much. It broke me," he said.
"It was the most exciting time of my life and I had feelings for this girl."
When Arabella claimed to be pregnant for the third time and sent him a 12-week scan, he knew something wasn't right.
"The scan she sent me was off. I went to my mates and showed them and they were like, 'Mate, that is not a proper scan.'"