Married At First Sight UK fans have said Kasia looked 'defeated' as she chose to leave the experiment on Thursday evening.
The 36-year-old entrepreneur revealed her decision in a passionate speech after sharing her upset over her husband Kwame's actions during the Homestays.
The latest episodes saw mum-of-one Kasia travel to Leightonstone in East London where Kwame lives – to later be told he wouldn't be taking Kasia to see his home as he is a "private" person.
During the following days Kasia took Kwame, 42, back to her home and began to explain her story to her husband but soon felt as if she was being interrupted by him making jokes.
She was also then advised to ditch the business consultant by her sisters after they grilled him.
Kasia later made her feelings clear as she told the girls that she now saw herself as single in the experiment, hinting at her plans to leave.
And, on Thursday night, Kasia then made her upset apparent to a taken aback Kwame, who was recently slammed for 'body-shaming' comments, during the commitment ceremony.
As she and her husband sat in front of the MAFS experts Paul Brunson and Charlene Douglas she revealed her decision: "I'm going."
Soon after, Kasia revealed she had decided to leave the experiment much to Kwame's shock, who had originally chosen to stay. However, he soon changed his mind after hearing Kasia's thoughts.
He explained: "I took some time out after I left Kasia's home. I felt like I would always speak with K and got the feedback we were cool.
"We've made it this far so that's saying something. Everything that's happened hasn't changed how I feel. So my decision is to stay..."
He added: "I ain't finished. I never want to make her stay if she doesn't want to, especially when it's been made so clear so I would definitely like to change what I've written to leave."
As the scenes aired fans took to Twitter to share their reactions, with one saying Kasia looked 'defeated'. They wrote: "Kasia looked defeated & deflated tonight, was upsetting to see, but happy to see in the VT that she feels free now."
Another added: "I knew Kasia was putting leave from she came to the commitment ceremony with no make up on, sis was done #MAFSUK".
While a third praised: "Yes Kasia.. glad she stood firm in her decision!"
Following the airing of the episode, Kasia revealed she felt Kwame hadn't been genuine with her on an Instagram live, as she said of her ex-husband: "From day dot, really, that you aren't what you say you are.
"I don't want to say those things because I don't want to humiliate him as he humiliated me – tried to humiliate me. But what I tried to do is lead with love and I came from a certain place and he isn't in a certain place, it's not what I really wanted to come into but he might be a good person so let's give him a chance.
"So I tried to give him a chance and then he disrespected me while I tried to give him a chance. So there was no more disrespect that I could take."
Meanwhile, Kwame posted a snap of himself on his Instagram stories and wrote on top: "Big thank you To all who supported my journey I tried my best and learnt so much
"You guys are amazing shout out to my MAFS family I miss you all Thanks for the loving messages".
