I love the way we are both looking in astonishment at my son. It shows the unwavering support she gave me when he was born

This picture of my mother, me and my eldest son, Theo, was taken the morning after he was born in May 2002, in University College Hospital, London.

There are a lot of things I love about it. I love the fact my mother is exquisitely dressed – she’s wearing her pearls! She always looked very elegant at this time in her life and enjoyed clothes (we bought that suit on a day out together). I love the composition too – our three dark heads, faces in profile and the way our three hands are aligned. I love the miracle of my son’s intricate little shell of an ear, the nose (his dad’s) and lips (mine) still visible now in his 23-year-old face.