Jack appeared on Today Extra on February 6, where hosts David Campbell and Sylvia Jefferys questioned him about the drama.
"I can assure you when I was applying for MAFS to get married, in my opinion, I was not in a serious relationship at all whatsoever. So yeah..." he said.
When asked whether he did in fact tell the girl he was "going to leave the country... and then just turn up on television?"
"I regrettably said I'm actually going overseas for a few months... so the door is shut," he responded.
Fellow contestant Jayden Eynaud requested to "clear it up" while at the dinner party, saying "Everyone knows about the article that came out about Jack."
The article in reference is allegedly referring to a claim made by Courtney Jade, who revealed to Instagram that Jack had dumped her to go on MAFS.
"Breaks up with me right after I met his family and he told me he loves me. Tells me it's for [a] 'work opportunity in America' only to find out he's on MAFS in Sydney," Courtney wrote on The Wash's Instagram.
"I even started selling my furniture when we were together as we spoke about moving in together," The Wash revealed the woman told them.
"This is definitely the worst thing a man has ever done to me. I'd been driving myself crazy for a month wondering why everything was so shady [when he ended it]."
News.com.au reported that Courtney commented on a post with paparazzi photos of Jack on his wedding day.
“My mental health has suffered due to being completely blindsided and losing my best friend to a reality TV show,” she wrote.
“Jack has never tried to break up with me and our relationship was becoming quite serious. We spoke regularly about our future together and I don’t believe he is on the show for the right reasons at all.”
Jack, however, claims that the relationship was "very casual yet exclusive," as he said in the MAFS episode where the issue was raised at the dinner table.
"It's all out of context," Jack said. "She fell harder for me quicker and she's thrown me in front of the bus, but I'm still not going to go there [and share information about her]. I've got everything on this girl, but I would never do it. She's had a colourful past."
Jack said that he ended their relationship "seven weeks ago," which MAFS expert Alessandra Rampolla then confirmed that he would have been in the process of the experiment when this happened.
"We're going to need to talk to him about that," expert John Aiken added.
Yahoo Lifestyle revealed that Jack seemingly regretted how he handled the situation at the dinner party.
"Once filming had wrapped and he'd reflected on it, Jack reached out to Courtney, apologised and gave her a heads up this would all be airing on the show and repeatedly brought up throughout the season," an insider told Yahoo Lifestyle.
"When confronted by the cast, Jack got defensive by default, but once he realised how this would impact Courtney, he wanted to reach out. It was all too little, too late for Courtney though, who doesn't want to speak to him and is apprehensive about being dragged into his storylines."
Daily Mail Australia has reported that Courtney was left distressed after seeing his marriage play out on TV.
'It's been a very hard time in my life. One that I don't wish on anyone,' she allegedly told Daily Mail.
"I hope this doesn't continue to happen to other people. It was a horrible experience and not something I want to talk about."