The feud among the brides turned vengeful in the latest episode of Married At First Sight.

Expert Alessandra Rampolla could not contain her shock when Juliette Chae confessed that she used Sunday’s commitment ceremony to ambush Bec Zachariah.

Still smarting over having to apologise at last week’s dinner party for calling Bec a ‘dumb c**t’, the 27-year-old claimed that her rival had ‘done much worse’ to other members in the group.

Juliette was on the couch in the middle of giving the group an update on her relationship with groom Joel Moses when she turned on Bec.

‘You should be careful with how much you are upset about me [calling you a dumb c**t] when I have screenshots of what you’ve said about Alissa and David,’ she said.

‘It was vile,’ she continued, and quoted the expletive-filled messages to the experts and the group.

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The feud among the brides turned vengeful in the latest episode of Married At First Sight. Pictured: Juliette Chae

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Expert Alessandra Rampolla (pictured) could not contain her shock when Juliette Chae confessed that she used Sunday’s commitment ceremony to ambush Bec Zachariah

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Juliette was on the couch in the middle of giving the group an update on her relationship with groom Joel Moses when she turned on Bec (left)

‘What are you trying to prove?’ responded Bec.

A dumbfounded Alessandra asked how she managed to get hold of Bec’s messages from an earlier group chat.

Gia Fleur said she had shared the incriminating DMs with Juliette, so the bride could ‘see what Bec was like’ and added: ‘I don’t look great in them either.’

In an unguarded moment, Juliette then unveiled a secret plot she had concocted with Gia to ‘expose’ Bec for slamming other couples in the group.

Juliette revealed that she had heard chatter that Bec was ‘excited’ by the idea that the experts would ‘f**k her up’ during the commitment ceremony.

She continued: ‘That’s an evil thing to hope for, and that’s when Gia and I came up came up with the plan so she can address the screenshots… this is the time to use them.’

A dumbfounded Alessandra then turned to Gia to confirm Juliette’s plot to ambush Bec.

She said: ‘Just to be clear, Gia, you sent the screenshots to Juliette so it could be used against Bec.

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Gia Fleur (left) said she had shared the incriminating DMs with Juliette, so the bride could ‘see what Bec was like’ and added: ‘I don’t look great in them either’

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In an unguarded moment, Juliette then unveiled a secret plot she had concocted with Gia to ‘expose’ Bec for slamming other couples in the group

A clearly uncomfortable Gia admitted the story was true and added that she ‘did not want’ the ugly messages ‘out’.

‘It just shows that me calling her a dumb ‘C’ was blown out into such a big thing when she has done much worse,’ Juliette complained.

‘Can I give you some advice?’ Alessandra told Juliette.

She continued: ‘You could not be further from the truth. It is shocking you would think that.

‘[This] makes you look so much worse… it is like conscious retaliation for for the purpose of hurting.’

At first, Juliette appeared to understand her drastic behaviour was wrong, but moments later, she was headed out the door.

Juliette said: ‘I know…I’m covering up so much, and I don’t think this experiment is for me.’

She also had final words for her friend: ‘Gia, what the f**k.’

Her bewildered husband Joel raced after her, only to cop an earful of abuse.

‘You are such a dog, you are dog and a pig… you completely threw me under the bus, you’re so evil,’ she screamed.