Trust your gut. There are many here who say that older parents who are deep in the organization should not have the lies exposed to them. But I and some others here feel that even if they are older with years of service, in many cases they still deserve to know the truth.
Absolutely - different situations and people require different tactics. Gill, you are the only one on here who can judge how much info your parents can take. In my case the above doesn't apply, but that's judged by my knowledge of my parent.
It's just like a lot of things in life - no clear cut right and wrong answer.
FF