"Art is raw and you—ma'am—have given birth to an artist," one viewer commented on a video showcasing the portrait.

A mother whose son died of cancer ... The project, called The Passing Of Time: 40 Portraits, depicts images of Graeme and 39 other children affected by neuroblastoma. Family Handout/PA Real ...

Six-year-old Louis captured his mother smiling joyfully ... Elsewhere, Kate has received praise for her photographic portraits of her children and she has documented milestones in their lives ...

Just having a good laugh on top of it." Many viewers also saw something else in the portrait: a child's love for her mother. "The truly amazing thing about this is that you were her muse ...