Brett Helling and Booka Nile turned up the heat in their relationship on Wednesday's episode of Married At First Sight.

Just one day after meeting for the first time at their wedding, the newlyweds, both 31, shared a steamy bath together during their honeymoon on the NSW South Coast.

After forging an emotional bond, Brett admitted he was keen to see if their connection extended beyond just friendship. 

The electrician then ran a bubble bath and poured a couple of glasses of Champagne, before climbing into the tub and inviting a bikini-clad Booka to join him.

'One of the biggest things for me was trying to find someone who's comfortable in their own skin, confident, funny, and I've got that in spades with Booka,' he said. 

'It's been great to hang out. It's like we've known each other for a long time.'

He added: 'But I really hope we are just as easy, just as natural with our physical affection.' 

As they sat facing each other in the bath, Brett invited Booka to come closer, offering her a shoulder massage. 

He confessed that he was keen to 'show her some of my skills and try and impress her'.

Booka appeared open to the idea and admitted she already felt 'weirdly' comfortable with Brett, despite having only just met him.

'I have a good gut feeling with Brett, and I think that that means something. And I just feel very safe with him, which is great,' she said. 

'And in this experiment, you've got to fast-track things a little bit, so I guess just knowing that we do get along really well helps me to let down some of those walls that I would normally have up.' 

As she leant back against Brett's bare chest, Booka couldn't help but make light of the absurdity of the situation.

'It's really weird, because I didn't know you yesterday morning, and now I'm in a spa bath with you, and you're wearing your jocks, giving me a massage,' she told him.

'I can take the jocks off,' quipped Brett, prompting Booka to burst out laughing.