When my mother was seriously ill, heart disease not cancer, she chose to keep the seriousness of her condition from my 2 brothers and me who were aged 23, 28, 34 when she died. I, the eldest, had 2 DCs (9 &7) who adored their Nana. The shock of her death was awful for us all. My dad was grief stricken ..though I assume he knew, and I focussed my attention on supporting him. I was angry that, whilst trying to protect us, she caused us all greater anguish & guilt..all those "if only" moments! I am fine now..it was a long while ago but I would have rather known the painful truth.