When my eldest reached the milestone of his teenage years late week, it was chance to reflect on his life so far and his life still to come. But it was also a chance for me to reflect on my friend Kelly and her daughter Abi. Because Abi will be forever 12. One day my son came home from school and told me a girl in his class was very ill and all the girls were crying. When I saw the headlines, I knew the worst had happened.