Bec Zacharia shattered Sunday's Married At First Sight reunion dinner with shock revelations about fellow bride Stephanie Marshall messaging her husband, Danny Hewitt.

But only a day earlier, it was all smiles for the pair of brides as they were snapped sharing an emotional greeting at Sydney Airport.

Stephanie, 32, who left the experiment early after her stormy match with Tyson Gordon failed to spark, stepped off her plane looking smart in a leather maroon-coloured mini dress.

Bursting into a wide grin as she stepped from the terminal upon catching sight of Bec, Stephanie ran straight into the arms of the controversial bride.

Dressed in a brown crochet halter top and blue jeans, Bec responded with a warm hug.

The pair were then seen chatting eagerly with their MAFS co-star Rachel Gilmore, before climbing into a waiting vehicle.

At the dinner party, Bec would later claim that she learned her groom was messaging Stephanie just after the pair had met at the airport.

As the cast watched on, Bec told the group during the reunion that Stephanie had shown her the messages that Danny had sent her. 

'So I looked, and she had messaged him first. She said: "I went to Hamilton Island," he said: "Send me photos," and she sent him four photos – three of the ocean and one of her in a bikini,' Bec said.

'The last voice note he sent was, "I've made friends for life from this experiment, but about the end, can't be sad, got to move on and keep going."

'She sent a voice note back saying, "It's just so nice to hear your voice", and he replied with two love hearts.'

Bec added that Steph had asked her not to bring it up at the reunion, but Bec briefly broached the topic with her over cocktails, and it appeared the pair had put the incident behind them.

However, speaking to producers, Steph had some harsh words for Bec.

'I'm not entertaining this conversation,' Steph told producers. 'She can f*** off, basically. This is not my problem. Like, it's not deep.'

Bec wasted no time in bringing up the messages with her former groom over dinner.

As they were sitting down, Danny asked Bec to sit next to him, and she replied: 'Are you sure you don't want Steph to sit here, sending love hearts and voice notes, no?'

Later, Steph tried to justify her relationship with Danny, saying they had forged a connection after the experiment as they worked in the same industry.

This infuriated Bec, who asked why she was messaging Danny in the first place.

'When I couldn't get out of bed because I was so hysterical, Steph was on the phone to me, saying, "He's an idiot, he's a loser." And then, a week later, you drop off the face of the earth, but you're messaging my ex-husband. Why?'

Steph replied with a shrug of her shoulders and a flippant, 'Okay, that's how you feel about it.'

Bec then shouted at Steph, 'You are contacting my ex-husband, you're meant to be my friend...you're on the phone to me saying he's a c***, and you're sending him bikini photos, and you're on the phone to him.

'Who do you think you are?' she spat.

All of the frustrations that had been building in Bec throughout the series reared their heads as she continued to slam both Steph and Danny.

'You are a dog, and so is she,' Bec raged.