"My real moment was about eight months ago," Kirstie says. "I got out of the car at a hotel and the valet person said, 'When are you due?' And I just said, '11 weeks!' … It hasn't been really painful, but I think the hardest part is that I spent most of my life thin, you know? [Now] it's an effort to get dressed, whereas before I would just go, 'Ooh, I look good in these jeans.'"