Now, following their incredibly public divorce, Thorburn has discussed what it's like co-parenting.
Speaking to DailyMail, the 46-year-old revealed that the estranged couple both attend family-related events, however are leading very separate lives.
'We have three children and often attend events, but of course not together. We are divorced,' Cassandra asserted.
The former journalist and the morning television host share three children together - Jackson, 18, Ava, 12 and River, 11.
Since February this year, Karl has been dating model and shoe-designer Jasmine Yarbrough after meeting at a Sydney boat party.
Just last month the couple made their first red carpet debut, and the Today Show co-host couldn't help but gush about his younger girlfriend.
'There is a lot of love in my life. She's a very strong and passionate person,' he told The Daily Telegraph.