Rosemary MacCabe: ‘I just kept thinking, what if we don’t buy it – and something happens my baby?’

I remember, in the days after my sister gave birth to her third child, Chance – who is now a robust five-year-old with a penchant for stealing carbonated drinks from whoever has the misfortune to leave theirs unattended – her deliriously telling me that she couldn’t believe that she and her husband had created this miracle, this angel baby. “Can you believe it?!” she asked me, gazing down at him. “I mean… we made him!...