Not in England. Your information is fifty years out of date.
She died in the nurses' accommodation in London, not the family home in Bristol (which is over 100 miles away), so there was no possibility of the children finding her. Your knowledge of the facts of this case appears to be somewhat superficial.
Since when did taking the life of a King/Queen's subject, even by your own hand become legal? Do you have a reference for that. If I recall correctly many were prosecuted for that fact alone, never mind the heinous crime committed.
Secondly, no matter WHERE the nurse committed her suicide, it still impacted, and will impact the lives of her children 'till the day they die.
As far as I'm concerned, those DJ's didn't kill this woman, she chose to take her own life, for whatever reason, and her decision is what will stay in her children's minds until the day they die.
My opinion only