The 49-year-old A Place In The Sun and Escape To The Country host said it was hard to see nice things happening to his family as he knew he “wouldn’t be around much longer”.
Earlier this month, Irwin said he did didn’t know how much time I had left after his lung cancer spread to his brain.
He revealed the first warning sign of his illness came during filming of A Place In The Sun in Italy in August 2020, when his vision became blurry while driving.
The broadcaster shares three-year-old son Rex and two-year-old twins Rafa and Cormac with his wife Jessica.
Speaking to The Sun newspaper, he said: “Every time something really nice happens to them, this thing knocks on my door and says, ‘Don’t be too happy because you won’t be around much longer.’
“Then I guess they won’t remember me, they really don’t.
“They are too young and if I die this year there is no chance they will have memories.”
He added: “Probably someone else will bring her up. I did the hard yards with them and someone else will get the easy part.
Irwin previously said Hello! Magazine that he hoped sharing his diagnosis would inspire others to “make the most of each day,” and encouraged people to take out life insurance.
He said he chose to keep his illness private until recently.
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