Radio presenter and former model Lisa, 44, told her fellow celebrities that she "kind of left it late" after failing to find the perfect man to start a family with.
During a heart-to-heart, Lisa- who was romantically linked to Hollywood actor George Clooney in the noughties - was asked if she ever wanted children.
She replied: "It's a weird one..because it's so hard. I kind of left it late. I didn't find anybody that I wanted to actually be with and I didn't want to have kids with just [anyone]."
Lisa added: "I wanted that unit kind of thing. I feel like maybe not in this lifetime now."
Continuing in the Bush Telegraph, Lisa later said: "Children enrich your life so much, so of course I wanted to be a mum. But it just didn't work out for me in that way.
"It's tricky. It is hard. It's not like I've got a heart of stone where it's like, 'No, I don't need them. I don't want them in my life'. It's been something that I've had to deal with. It's not always as simple as, 'I didn't want children'."
I'm A Celebrity...Get Me Out Of Here! continues nightly on ITV1.
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