Perhaps had Diana been a little older and somewhat wiser in the ways of the Windsor world, she may have learnt to turn a blind eye. Poor thing would most likely be alive today.
Given her family and her upbringing, she should have been more than aware of how things were supposed to work!! Let's not forget, she admitted to at least two affairs herself......
They were the first Royal couple to experience the glare and scrutiny of the modern media, and many think it was this intrusiveness that broke down the facade of royal marriages.