Hi David,
I can understand how torn you must be about what to do. You feel as if you have to do what is right for your parents, just as they have always done what is right for you. Look back on your childhood and remember those times when they may have protected you as that was the kindest thing to do. Now you can do the same for your mother. Please do not feel guilty by keeping the truth from her. Do what is best for her. Like others have said, there is no point in upsetting her.
Take care.
Janet.
Dear Janet, thank you so much for your very kind, gentle and supportive reply. It is very much appreciated
Best wishes
David