They have repeatedly clashed since meeting for the first time at their wedding, on Married At First Sight last month.

And Billy Vincent, 28, has lashed out at his 'wife' Susie Bradley, 25, after the single mum was busted kissing NRL star Todd Carney, 32, in Brisbane on the morning after Valentine's Day.

'What can I say? That's a really hard one for me, I have mixed feelings about that,' he told The Daily Telegraph on Friday.

'You can really see Susie's judge of character by the people that she hangs out with. 

'I don't know the guy but, look, those two go together like...' Billy trailed off before abruptly being cut off by a Channel Nine MAFS publicist.

Meanwhile, Billy said he was frustrated watching himself on the show as he questioned why he was such a 'gentleman' to his fiery 'bride', who blasted him this week as being 'not manly enough'.

'I treated her with respect...  I look at the TV and go, ''Why were you such a gentleman to her'',' he candidly confessed. 

Last month, Susie landed herself in trouble with Channel Nine producers after she was caught kissing Todd outside a Brisbane hotel. 

While the sharp-tongued blonde has downplayed their romance in recent media interviews, she and Todd appeared to be very much an item while holidaying in Byron Bay on Sunday.  

Several onlookers spotted Susie and Todd sitting down for lunch at The Beach Hotel, with her on-screen 'husband' Billy Vincent nowhere to be seen.

In a rather telling display of affection, Todd draped his arm around Susie's shoulders at one stage. 

An eyewitness told Daily Mail Australia that Todd and Susie entered the venue separately before discreetly joining each other at a table. 

The sportsman was also joined by an older male friend, according to other patrons. 

Todd, whose NRL career was derailed in 2014 when a photo surfaced online of him urinating in his own mouth, also sported a black eye. 

The sighting came hours before Sunday's episode of MAFS aired on television. 

During that night's commitment ceremony, Susie almost reduced her 'husband' Billy to tears with her relentless insults.  

During an extraordinary tirade, the single mother complained that Billy's constant compliments made her feel 'uncomfortable and awkward'. 

She also listed all the things she disliked about the personal trainer, including the fact he is 'not manly enough'.

As Susie's tumultuous marriage to Billy plays out on Married At First Sight, her new relationship with Todd is being documented in the tabloids.  

Speaking to the Courier Mail after photos surfaced of her and Todd outside a hotel on Valentine's Day, Susie said fans 'misunderstood' the situation.

She also said 'the hardest thing about those photos' is that viewers watching MAFS don't understand that her scenes with Billy were actually filmed months ago. 

While she refused to confirm if she was dating Todd, Susie added: 'People think I'm married [to Billy] and seeing Todd Carney at the same time and that's not the case.'

Married At First Sight continues Sunday at 7:00pm on Channel Nine