We've already had one couple swap this season with Jacqui Burfoot shacking up with Clint Rice - but I can reveal two other participants flirted with scandal.
And I had a front-row seat to their escapades.
Just hours before the MAFS cast reunited for the finale taping, English larrikin Billy Belcher, who was paired with Sierah Swepstone on the show, was caught getting handsy with another bride, Carina Mirabile.
But it wasn't your typical couple swap. Instead it was all about Billy trying to make 'as much noise as possible' when he returned for the reunion.
'He wanted his moment. He wanted to leave a lasting impression and be part of the MAFS season 12 highlight reel,' my source tells me.
'He didn't get the screen time he'd hoped for during the experiment, so he was looking for a way to make headlines.'
Hours before the MAFS cast reunited for the finale, Billy Belcher, who was paired with Sierah Swepstone on the show, was caught getting handsy with another bride, Carina Mirabile
Insiders tell me that Billy was desperate to leave a lasting impression at the cast reunion
There are mixed reports about Billy and Beth Kelly ahead of the reunion.
Some insiders claiming he suggested they attend as a couple—while others say Beth shut it down, making it clear she only saw him as a friend.
Undeterred, Billy then slid into Carina's DMs.
'It started off flirty,' my source explains.
'They were Facetiming a lot and hanging out. It was like an unexpected and surprising friendship that caught everyone off guard.'
While the two maintain there's nothing romantic going on between them, show insiders say their chemistry was undeniable.
One reason why Billy chose Carina was because he couldn't stand her on-screen husband Paul Antoine and wanted to embarrass him.
'Billy really liked Carina,' a source tells me.
!['[Billy] wanted his moment,' a source tells me. 'He didn't get the screen time he'd hoped for during the experiment, so he was looking for a way to make headlines'](https://i.dailymail.co.uk/1s/2025/03/25/13/96507059-14530215-_Billy_wanted_his_moment_a_source_tells_me_He_didn_t_get_the_scr-a-13_1742908370380.jpg)
'[Billy] wanted his moment,' a source tells me. 'He didn't get the screen time he'd hoped for during the experiment, so he was looking for a way to make headlines'
In the hours before shooting the reunion, Billy and Carina's 'swap' was carefully stage-managed to 'cause a scandal'
They even made sure I was there to take photos of him arriving at her Airbnb in Coogee, although I hear there wasn't any funny business inside
'And let's just say he and Paul never got along. He always thought Paul was foul and didn't deserve someone as cool as Carina.'
In fact, Billy would often mock Paul behind the scenes, telling the cast and crew 'he didn't even buy his wife flowers'.
In the hours before shooting the reunion, Billy and Carina's 'swap' was carefully stage-managed to 'cause a scandal'.
They even made sure I was there to take photos of him arriving at her Airbnb in Coogee, although I hear there wasn't any funny business inside.
While they did exaggerate the relationship for attention, it was also clear to me the two were genuinely very close and I wouldn't rule out their showmance blossoming into a real romance someday.
Cast members told me Billy and Carina would often Facetime each other - and I caught them doing just that after they arrived in Sydney for the reunion.
Billy initially reached out to Beth Kelly, suggesting they show up to the reunion as a couple. But Beth declined, saying she saw him as a friend and didn't want to masquerade as anything else
Undeterred, Billy then slid into Carina's DMs. 'It started off flirty,' a source reveals
'They were Facetiming a lot and hanging out. It was like an unexpected and surprising friendship that caught everyone off guard,' adds my insider
It comes after Carina's relationship with Paul completely unravelled in the wake of the final challenge of the season, 'Is the Grass Greener on the Other Side?'
As I previously reported, Paul agreed to meet his 'back-up match' during the task - something Carina saw as the ultimate betrayal.
Sources say she was devastated by his decision, branding it 'emotional cheating'.
'She was genuinely hurt. She went into the experiment looking for something real, and Paul completely blindsided her,' says an insider.
The fallout was immediate. The couple struggled to bounce back, and things only grew more tense as the cameras stopped rolling.
Carina, who didn't agree to take part in the task, was not impressed when she later learned about Paul's 'curiosity'.
Paul regretted his decision almost instantly.
One reason why Billy chose Carina was because he couldn't stand her on-screen husband Paul Antoine (pictured) and wanted to embarrass him
It comes after Carina's relationship with Paul completely unravelled in the wake of the final challenge of the season, 'Is the Grass Greener on the Other Side?'
!['[Carina] felt betrayed. This challenge tore them apart,' says an insider](https://i.dailymail.co.uk/1s/2025/03/23/09/96479697-14527763-_Carina_felt_betrayed_This_challenge_tore_them_apart_says_an_ins-m-19_1742722190571.jpg)
'[Carina] felt betrayed. This challenge tore them apart,' says an insider
His choice would have dire consequences for his relationship with Carina, who rightly considered it 'emotional cheating'.
Meanwhile, Billy and his on-screen wife Sierah decided to leave the experiment after their relationship became riddled with trust issues.
The final straw was a secret dinner involving fellow groom Adrian Araouzou.
Sierah admitted to having a secret dinner with Adrian and another cast member, Tony Mojanovski, but failed to disclose the outing to Adrian's 'wife' Awhina Rutene.
In an emotional confrontation, Billy revealed he felt frustrated and blindsided.
'I just feel like I've really retreated. I've got literally no deep connection from you, Sierah. I've got nothing,' he said.
