"We did end up hooking up after the show," he spilled in an Instagram Q&A session.
"KC and I did go on a date on the show. It was good. We had fun. It was a breath of fresh air. Both of us weren't too happy in our relationships at that stage," he said.
"It was good to go on a date with someone we got along with."
The 27-year-old – who split from his ‘wife’ Connie during the final commitment ceremony - then went on to spill that the pair had even gone on a couple of dates after filming wrapped, admitting there "were a couple in Sydney and one on the Gold Coast", where he lives.
"The rumours about KC and I hooking up while filming, we didn't hook up, we had a date. But we did end up hooking up after the show."
While Jonethen is happy to tell all about their short-lived fling, KC refused to be drawn on the matter when questioned by Daily Mail Australia.
"I don't really need to give this much attention. I found my prince now," she said, referring to Goonan.
Last week KC and Michael confirmed their romance, admitting to New Idea that they have secretly been dating for five weeks.
"It’s love. We have one hell of a journey ahead of us – everything is on the table. We even moved in together last week," said the Adelaide dad who's the managing director of his family's commercial ice business.
Michael also revealed the MAFS bride— who moved back from Hollywood in the hope of finding love— has met his son, Connor.
"He's a cutie," she said, with Michael adding they've already discussed starting their own family together.