My daughter was diagnosed with cancer at age 14 in 2007 and I understand the mother very well.
Our lives were turned upside down in a matter of hours , we became overwhealmingly afraid , desperate and in despair and we would do ANYTHING to save our children's life , even if that meant having another child if we knew the oldest one would have a chance. Who wouldn't ?
It's easy to judge this mother for doing so but the truth is when you are faced with this you do everything possible.
As far as ignoring the son , it's not ignoring , it's it's re-prioritizing. A cancer diagnosis changes everything , including family dynamics . It can make or break a marriage , I know many that have not survived a diagnosis like this. I have cried myself to sleep many nights because I felt I had abandoned my then 10 year old ( when I really had not because she was with my husband ) or I could not go to one of her functions because I could not leave my sick child or I was in the hospital with her , what I am trying to say is that what may seem ignoring to some is tearing the mother apart inside , we feel very guilty.
This movie to me is re-living everything all over again , I don't wish this to my worst enemy.