Jessika from Married At First Sight has hit back at claims she cheated on ex-boyfriend Dan with another MAFS alum.

Shortly after Dan confirmed in a video obtained by Yahoo Lifestyle that he had broken up with Jess, the 35-year-old single father told the same publication that he learned Jess and MAFS Season 5 alum Telv had allegedly hooked up.

"He [Telv] messaged me on Instagram saying they hooked up just before Christmas," Dan told Yahoo.

Telv then confirmed the dalliance, telling Yahoo in a statement, "I really did have no idea whatsoever [that Jess was in a relationship]. Dan seems like a really good guy. I feel for him."

Dan Webb, Jessika Power and Telv Williams. (Instagram)

This week photos surfaced of Jessika and Telv hanging out. They were apparently taken in December, which was when Jess was dating Dan but before Season 6 of MAFS had aired.

Now, the 27-year-old admin officer has addressed the cheating allegations and denied anything happened between herself and Telv.

"Another day, another FALSE cheating allegation from someone who I thought genuinely was my friend," she wrote on her Instagram Story. "Telv and I caught up for a drink so he could introduce me to someone in the media we could help guide me throughout my journey on MAFS. No we did not kiss. No we did not sleep together. My best friend @em_cooker was also in our presence and is able to confirm this.

"I was completely head over heels and infaculated with my love for Dan at the time and I would never ever have done anything to jeopardize that. I have asked Telv to be clear this and admit to his lie so we can all move on and be happy family's again."

Jessika addresses the rumours in an Instagram Story. (Instagram)

Jessika has not directly spoken about her breakup with Dan, however the two have unfollowed each other on Instagram. They have also removed all loved-up photos from their accounts.

Dan was clear in his tell-all interview. "Me and Jess have split, let's get that straight. We have broken up," he said in the video. "There's allegations coming out that we're still together. She's saying we're still together. We are not together."

Jess and Dan at their final vows. (Nine)

The day before, Jessika called into The Kyle & Jackie O Show and told hosts Kyle Sandilands and Jackie 'O' Henderson that she and Dan were "working through a lot of things at the minute."

"We've had a few problems here and there along the way. This is a really, really hard situation to be in, especially when you're trying to build a relationship," Jess explained. "Watching back that reunion definitely brought back some of his emotions and his hurt, and seeing himself hurt, I think, upset him," she added, referencing the noticeable tension in their live Talking Married interview.

She also said the two came up against plenty of cheating allegations. "People are throwing around cheating allegations on my end and on his end, and I just think, why would we put ourselves through so much effort, and all this emotional stress, to just cheat on each other?" she said.

Jessika and Dan on 'Talking Married'. (Nine)

One major thing that impacted their relationship was Dan seeing footage at the reunion of Jessika telling Nic, another groom in the social experiment, that she had "developed some sort of feeling" for him. He saw the clips after Jess had repeatedly denied having feelings for any of the other men when she realised her marriage to Mick wasn't going to work.

The group watches the moment Jessika told Nic she had 'developed feelings' for him. (Nine)

"So [on] Talking Married, we had a conversation on air. It was live," Dan recalled in the video obtained by Yahoo. "But basically that conversation was me, I just wanted to get to the bottom of the whole situation with her and Nic -- if she flirted with him, didn't flirt with him.

"There's rumours about her hooking up with him in an elevator. I'm hearing it happened, but I just want to hear her tell me her side. I wanted to feel like she could trust me and the person I was giving her. I was giving her as much as I could give her."

Dan said he never introduced Jess to his son, but admitted that he did "love" her.