"And that is why it was quite easy for me to walk away from the relationship. It was just so much effort and I was just so consumed by it," she continued.
Cathy also revealed she has found a new man in the video, who is "so much better" than Josh.
She also revealed that she will not be staying in contact with Josh when one fan asked.
"Let me tell you this now sis, no! No to everything. The only time we have ever spoken to each other (since the show) was very briefly when I messaged him 'just to let you know, I'm in Brisbane for work'," she replied.
"There was not even an apology for everything that had happened. And I bet to this day he still thinks that he has never been in the wrong.
"Please can we put it back behind us? Like, I have moved on, I've found myself someone so much better!"
She also addressed the rumours that she and Josh split up because she never wanted childrne.
"All these interviews that are coming out after the show, I hear that my "ex-husband" (Josh) is now saying that 'it didn't work out because she didn't want kids'," she said.
"This person (Josh) did not get to know me at all in the time that we were together. Everything that I tried to tell him about me, he didn't want to hear and wasn't interested. He even told me that I wasn't his type."
Most recently, the pair seem to be on bad terms because of their co-star Connie Crayden, who Cathy revealed to be a "mean girl".
After that, Josh was quick to defend Connie against his ex-wife, posting to social media a photo of them together.