Many of the pair's fellow MAFS contestants joined in on congratulating the couple, with Janelle, Sandy, Adam and Harrison all commenting on the original post.
However, it appears Duncan's on-screen wife Alyssa, was not as impressed. As Duncan and Evelyn went public with their new living arrangements, Alyssa took to Instagram to share more details on her experience on the show and how she found out about the new couple.
In the Instagram stories, Alyssa revealed that she only learnt of the couple from someone else, with neither Evelyn nor Duncan giving her the heads up.
"I don't expect any ex of mine to tell me they are moving on with someone else. That would be absurd. But if it's with someone in our friend group, who we went through a life-altering experiment with, and who was supposedly 'rooting for us,' and they had enough 'respect' for Rupes to tell him. Doesn't make sense to me."
"I'm done being silent and hiding away my thoughts and feelings in fear of being trolled and called a 'victim.' So much went on in that experiment that was never shown. There were multiple reasons I was reacting the way I was reacting. It wasn't over nothing."
"I think it's time I do a tell-all," she added before revealing some more details about her 'edit.'
"A reminder that MAFS had a perfect opportunity to talk about how a partner can support you when you're having a panic attack and bring awareness to anxiety and mental illness. Instead, they edited me as a 'psycho'...not to mention the endless manipulation from production and on-set 'support' to learn my triggers to use against me and to talk me down from the ledge and get back into filming at my peak vulnerability. They should have said, 'Alyssa you're not well enough to continue in this experiment we are granting your wish to go home.'
Married at First Sight Season 10 stars Duncan and Evelyn first confirmed the news of their relationship to 9Now in May.
When asked if they were in a relationship, Duncan replied "Yes I am!" before adding "...Well yes, we are!"
"This is Evelyn and Duncan's hard launch," added Evelyn. "It feels good to finally just say it, and it feels kind of exhilarating in a weird, freeing way."
In the cute Q&A video for Nine, the pair also dished on what their dating life has looked like these past months, which saw them go for secret beach dates and seafood picnics.
"That's the part I'm really looking forward to once we've come out and said that we're in a relationship," Duncan told the publication.
"We can do all those fun things, and not have to sneak around and share all those great moments together."
The same day Evelyn and Duncan confirmed their relationship, his on-screen ex-wife Alyssa seemingly made her view on the new couple clear.
Currently on a trip to Hawaii, the Utah-born contestant found time to reply to a fan's comment on her Tik Tok video after they asked; "How do you feel about Evelyn and Duncan being together? I thought she was your friend!”
“Rip” was all that she responded.
The blunt response comes after Evelyn and Duncan shared that the MAFS cast had been supportive of their relationship.
"We have been welcomed as a couple in the most positive way," explained Evelyn to Nine.
"Obviously [we] gave Rupert a call as well, and got the blessing from Rupert! He was very supportive as well," Duncan added.
Yahoo Lifestyle first reported on the rumours of the relationship a month prior, saying Evelyn and Duncan are indeed “seeing each other”.
The insider said, “They’re not boyfriend or girlfriend or anything like that, but they’re going on dates and telling friends they’re seeing each other.”
“Neither of them wants to rush into anything so they’re taking things slow for now, but they’re both into each other.”
Fans weren't surprised by the news, as there had been several signs over that pointed to Evelyn and Duncan starting up a romance.
Evelyn had shared a TikTok that showed Duncan with his arm around her and carrying Evelyn’s handbag.
Duncan also posted a few snaps to Instagram on April 20 and in one of the photos is one of Evelyn’s dogs. We’re not sure if it’s Mustard or Pickles, but it’s definitely one of them; which means Duncan and Evelyn were once again hanging out together!
And who could forget when the two were spotted dancing rather intimately at a Sydney club on April 1? In footage shared on The Wash Online’s Instagram, a shirtless Duncan lifts Evelyn up and she wraps her legs around his waist.
A MAFS insider told New Idea that Duncan became extremely “attracted” to Evelyn after they got to know one another during the now-infamous Couple Swap challenge.
Watch Below: Married At First Sight's Evelyn and Duncan spotted dancing
“Duncan had the best time with Evelyn. The fun part of him came out again. He wondered what it would have been like if they were matched together from the start,” the insider told us.
“He is definitely attracted to her.”