The he said/she said scandal between Married At First Sight's Jess Power and Telv Williams has escalated, with Telv leaking a video of their alleged late-night meet-up.

Quick recap for you: Jess was matched with Mick on the reality show and then hooked up with Dan.

During the MAFS finale, Dan discovered Jess had also cracked onto Nic on the same night she made the moves on him. Jess denied she was hitting on Nic but later admitted on Talking Married that she was.

Dan revealed last week he'd ended things with Jess partly because former MAFS contestant Telv Williams had let him know he hooked up with Jess when she was meant to be dating Dan over Christmas.

Yesterday Jess denied Telv's claim, saying on Instagram they met up for a business meeting, news.com.au reported.

"Another day, another FALSE cheating allegation from someone who I thought genuinely was my friend," Jess wrote.

"Telv and I caught up for a drink so he could introduce me to someone in the media we (sic) could help guide me throughout my journey on MAFS.

"No we did not kiss. No we did not sleep together … I have asked Telv to be clear this (sic) and admit to his lie so we can all move on and be happy family's (sic) again."

But Telv didn't "clear things up" as Jess wished. Instead he has doubled down on his claim that he hooked up with Jess, telling the Daily Mail: "I don't appreciate being called a liar. I also never wanted this to be public knowledge. I reached out to Dan because he was being called a cheater. So I thought coming clean was the right thing to do."

He also provided the Daily Mail with a video from Christmas Eve showing him and Jess and an unidentified man drinking champagne on a couch in the early hours of the morning that seems to challenge parts of Jess's denial.

"The video was taken at 3am at her house after we'd been drinking in Scarborough all day together," Telv told the Daily Mail. "So it was not 'one drink'."