Tension between Mike and Jessika has been brewing for some time, and this week things look to boil over. The problems started earlier in the experiment when Mike called the 26-year-old model "fake".
Though the comment about her being "fake" was disputed by Mike, there's no denying he had a lot to say about her appearance.
Mike labelled Jessika a "pretty little girl from the coast" before saying that "she's clearly had Botox on the lips," adding he is "not a fan of it."
Now, Jess' on-screen husband Mick, 31, reveals the pair have been intimate. This causes Jessika to claim she felt pressured to have sex because of an earlier conversation she had had with Mike.
But electrician Mike can't understand the fuss – because he claims Jessika and Mick had already done the deed in the first place!
"They had sex on the first night of their wedding," Mike, 43, tells TV WEEK.
"I just think she was being overly dramatic. I'm not sure Jess is attracted to Mick. I think she wanted to stay in the experiment, but keep him at arm's length."
As for rumours that Mike is secretly attracted to Jessika, he says that couldn't be further from the truth.
"It's a personal insult to me," he says. "She's not my type. I was so satisfied with Heidi, I didn't look sideways at another woman!"
Though Mike thinks Jessika was only leading her husband Mick on for the sake of the show, it seems he might have moved on with another contestant.
Fans were sent in to a spin last week, when we noticed that Mick and Lauren have been busy sharing flirty messages on each other's Instagram accounts. Could the pair be more than simply close friends?
Married At First Sight airs Monday to Wednesday, 7:30pm, and Sunday, 7pm, on Nine.