"I want my boys to be aware of their feelings. And if they are feeling a certain way, they can show that feeling," she said, referring to Aston, 4, and Henley, 1.
The designer went on to discuss her shock split from Jimmy back in August 2019, saying "every day is tough".
"You don't have your person to share all their milestones, cute things they do, ups and downs, and deal with their tantrums etc".
Nadia also took the opportunity to thank her family who have been her rock throughout the uncoupling.
The retired AFL star confirmed started dating socialite Lauren Mand less than two months after splitting from his wife.
"You either get bitter or you get better. It's that simple," Nadia wrote in a since-deleted post.
"You either take what has been dealt to you and allow it to make you a better person, or you allow it to tear you down. The choice does not belong to fate, it belongs to you."