She added: "As amazing as this all was, it absolutely terrified me. I was sceptical. I’m fiercely protective of the life I’ve built for myself over the last few years, having reconstructed myself after ending my marriage."
On Instagram, Isabelle captioned a love-up shot of the pair: "Questioning your worth, taking a risk and letting someone into your heart as a single mum is NOT easy, let alone sharing that decision with other people!.
"I'm officially stepping off the single escalator with this beautiful man who over the past four months has shown me how I can be truly loved.
"He's not just super sexy but is caring...bringing sport to people living with intellectual disabilities."
Isabelle separated from her husband-of-five years Craig Silbery in 2017, and has previously described their marriage as "loveless".
A few months after she confessed to having a huge crush on The Project's Tommy Little.
The mother-of-one recently opened up about discovering cancerous polyps in her bowel.
“Eight months ago I was really sick in NY on a girls trip and put it down to gastro but in my gut (pardon pun). I knew something was up and chose not to ignore the symptoms,” she revealed on Instagram.
“Turns out, I needed to have two high-grade cancer polyps cut out of my bowel a few months ago…the doc said that if left any longer, it wouldn’t have been good.”
Isabelle said one said the cancer diagnosis was "unexpected" while urging her followers to not ignore the symptoms and go get checked.
According to Bowel Cancer Australia, malignant polyps are growths in the wall of the bowel that can develop into a cancerous tumor if left undetected.