That's a hard one to answer as every person handles in a different way. I might suspect she would likely guess something amiss sooner or later. Personally I would want to know why my body was failing me and not wonder what is wrong.
I have just ended today 3 weeks of bewilderment, anxiety and fear of not knowing if I had a recurrence or not. In a strange way I am somewhat relived now.
God Bless you both!