Cassandra Thorburn has spent years being introduced to the public through a relationship she says is no longer part of her life.

But during a new interview with Kate Langbroek, one question about her former husband Karl Stefanovic briefly brought that old chapter back into the room.

Her response was strikingly blunt.

Thorburn said Stefanovic was “so far in my rear-view mirror” and that, in her words, she has not had anything to do with him in around a decade.

Yet the conversation quickly became about something much bigger than Karl.

It became a glimpse into how Cassandra has rebuilt her identity after divorce, motherhood, years of being defined by headlines — and now a serious cancer diagnosis.

The question that changed the tone of the interview

Thorburn appeared on Mamamia’s No Filter podcast with Kate Langbroek, where much of the conversation centred on her life before and after divorce, her cancer journey and the process of finding herself again.

Then Karl’s name came up.

Thorburn was asked whether she still considered her former husband part of her story after their 21-year marriage ended.

Her answer was immediate.

She said Karl was “so far in my rear-view mirror”, adding that she did not have much to say about someone she knew a decade ago.

When Langbroek asked whether she still considered him part of her story, Thorburn drew a very clear distinction.

He is the father of her children, she said, but she no longer thinks of him as part of her own life story.

The exchange was noticeably more direct than the reflective tone of the conversation around it.

“He’s my children’s father” — and little more

Thorburn and Stefanovic were married for 21 years before their relationship ended in 2016, with their divorce finalised the following year.

They share three children: Jackson, Ava and River.

Cassandra said that her connection with Karl now exists primarily through that role.

She described him simply as the father of her children, rather than someone she continues to think about personally.

That distinction appears to be important to her.

For years, she has publicly been described as “Karl Stefanovic’s ex-wife”, a label she has previously said became difficult to escape.

Now she is making it clear that, from her perspective, that relationship belongs to a much earlier chapter.

The life she had to rediscover after divorce

Thorburn went on to explain that one of the hardest parts of divorce was learning who she was outside a marriage.

She described marriage as becoming part of a partnership, while also being a parent and part of a family unit.

Then suddenly, she was no longer part of a couple.

She said that period gave her an opportunity to get to know herself again.

There is an important emotional thread in that reflection.

For much of her public life, Cassandra was known through relationships and family roles — wife, mother and eventually “ex-wife”.

Now, she is trying to define herself on her own terms.

And that process did not stop after the divorce.

It continued through a series of very different chapters.

From television to a life of reinvention

Before marrying Karl, Thorburn had already built her own career in journalism and television production.

Since the divorce, she has taken on a succession of very different roles and projects.

She appeared on Dancing with the Stars, wrote a children’s book, hosted a podcast about surviving separation, worked as a dental nurse and later worked in aged care during the pandemic.

As Mamamia noted, there was no single master plan behind those changes.

Instead, Cassandra has described herself as someone who repeatedly said yes to whatever came next.

That willingness to reinvent herself has taken on a very different meaning this year.

Then came the diagnosis that changed everything again

At the beginning of 2026, Thorburn was diagnosed with a rare and aggressive form of breast cancer.

Her cancer was an occult triple-negative breast cancer, meaning there was no obvious breast lump; it was detected through routine mammography and further investigation of lymph nodes.

She has since undergone extensive treatment including chemotherapy, surgery, radiation and immunotherapy.

By September, she had been described as cancer-free while continuing treatment. (7news.com.au)

Rather than stepping away from the public eye, Thorburn chose to document much of what she was experiencing.

She has also worked with Breast Cancer Network Australia to encourage women not to ignore screening.

This time, Cassandra decided to tell the story herself

The title of her Mamamia interview — I Have My Own Platform To Say My Truth — is revealing.

For years, she felt other people had shaped the public version of her life.

In a recent Sydney Morning Herald interview, she criticised the way the media had repeatedly framed her as a “bitter ex-wife” after the marriage ended.

She argued that the label had become a convenient story attached to her, rather than a reflection of who she actually was.

That is why the conversation about Karl feels significant in the wider context of her interview.

Her answer was not simply about him.

It was about refusing to let an old relationship continue defining her.

There was also a much harder conversation happening underneath

Thorburn revealed in the Sydney Morning Herald that Karl had not contacted her after she publicly announced her cancer diagnosis.

She said she knew who he was, suggesting that the absence of contact was not something she expected to change how she viewed him.

The comment added another layer to her podcast conversation.

She was not speaking about a fresh breakup.

She was speaking from the perspective of someone who had spent years building a completely separate life from her former husband.

And now, while facing one of the most difficult periods of her life, she is choosing to tell that story herself.

Her approach to parenting is just as candid

Thorburn also spoke openly about what happened to parenting after the divorce.

She described their arrangement not as traditional co-parenting but as “parallel parenting”.

In her words, she experienced herself as the sole parent in many respects.

She also acknowledged that there could be unexpected advantages to that arrangement.

Being the sole parent, she said, was not always easy, but there were times when it could also feel quite lovely.

It was another example of Thorburn resisting the simple narratives usually attached to divorce.

The interview became uncomfortable for some listeners

Not everyone found the conversation easy to listen to.

Several listeners commented online that Thorburn appeared guarded or defensive during some of the discussion, while others said they felt for Langbroek as she navigated moments that became unexpectedly tense.

Some listeners also said they sympathised strongly with Thorburn because of what she has been through with her cancer diagnosis.

Those reactions are subjective, however, and do not establish that Thorburn or Langbroek intended the exchange to become uncomfortable.

What is clear is that the conversation moved into emotionally difficult territory when questions about her past relationship collided with the much more personal story she was trying to tell about her life now.

The woman behind the old headline

Perhaps the most revealing part of the interview is that Thorburn’s story is no longer really about Karl.

It is about what happened after him.

It is about leaving behind the identity she once had as part of a marriage, raising three children, repeatedly starting again professionally and then confronting a rare cancer diagnosis that she says she wants to use to help other women.

The question about Karl may have lasted only a few minutes.

But the answer reflected a much bigger decision.

Cassandra Thorburn wants to be known for the life she has built, not the marriage that ended almost a decade ago.

And now she has something else to say

Her cancer journey has placed her in another uncomfortable position: allowing the public into a part of her life she could once have kept private.

This time, however, the story is being told in her own words.

She has spoken about the fear of receiving such a rare diagnosis, the realities of treatment, the importance of mammograms and the phenomenon of “cancer ghosting”, where people withdraw after someone becomes seriously ill.

Those experiences have given her a new reason to use her public platform.

Not to revisit the past.

But to make something useful from what she is living through now.

Karl may be in the rear-view mirror — but Cassandra is looking somewhere else

The most striking thing about Cassandra Thorburn’s response was not the sharpness of the words.

It was the certainty behind them.

She appears to have reached a point where her former marriage is no longer the centre of the story she wants to tell.

There is a different life in front of her now — one shaped by her children, her own work, her health journey and the person she has become since the marriage ended.

For a woman who says she spent years being defined by someone else’s name, perhaps the biggest change is this:

Cassandra Thorburn is no longer explaining who she was.

She is telling people who she is now.