An eight-year-old girl helped deliver her little sister, a few years after being left devastated by her mum's miscarriage.Little Brooke first got the news that she was going to become a big sister when she was only three, but her mum sadly suffered a miscarriage. 'It was heartbreaking. It really hit me hard … and Brooke especially', Kelsey told PEOPLE magazine. 'She was so young and we had been telling her she was going to be a big sister. So she took it really hard.