"I actually thought I was going to die at one point and left my body," Kerr tells Australian InStyle, which she graces the cover of this month. " I was looking down on myself, the pain was so intense."
The 28-year-old had previously only described the birth in vague terms, calling it "long and difficult."
Now, she tells the real deal behind how her natural childbirth felt.
"I kept thinking, 'How do women do this?' But if other women have done this, I can do it too. I was determined," she tells the mag.
And although the model mom quickly bounced back to her pre-baby Victoria's Secret bod, she said she would have been OK had that not been the case.
"Flynn is a big baby...and I thought to myself, 'I have so much more that I want to do aside from modeling," she said. "I can live with my body not being in shape if I have a healthy son. It's worth it."
Her hubby isn't just a pretty face either—Kerr calls Bloom a hands-on dad.
"It's whoever has their hands free. When I'm not working we don't have a nanny," she says.
And if Kerr, who is currently working on a new David Jones summer campaign, needs to jet off to work, she pumps her breastmilk beforehand and puts it in the freezer for daddy to feed to Flynn later.
We'd certainly call that hands-on.