If sensitive topics are revealed,which were not known...

Obviously, the behaviour depends on the topic/situation's intensity & it's charecter(good/bad) & also the mindset of the people, that how they react on that. But in this article, I'm dealing with those issues which one gets to know when he/she grows up, something or some behaviour which was also executed in their childhood, either with them or with their parents or close relation, or even some incidents that occured.
Everyone has some awkward past, which is buried deep into our hearts & never want to discuss with anyone or discuss it with someone really close, but when we get to know about it we sometimes get anguish  or depressed & may at times a feeling of enmity & hatred gets inculcated within. There are mostly issues of acceptance, partiality, atrocities & injustice faced by our both parents or any one which gets disclosed in some circumstances when we grow up, usually by our moms & sometimes even through dad. That person who did something wrong can be our joint family member or even some relatives, with whom we spent many good times too but have never felt any rift or animosity, or may be have never understood it inspite of their slight hints.Now, when you get to know about it, how will you react? What all will come into your mind? What are the emotions you'll go through?
For me, it is very difficult to analyze actually. I'm actually confused as that person is no outsider but the one whom you were very much accustomed to, a person who lifted you up in arms & cared for you sometimes. The person who tolerated every delicacy & fulfilled every small wishes since childhood. But now, as some gravely critical & sensitive secrets are revealed, now the respect which was there in soft innocent childish heart could certainly vanish just in a go?
May be already feeling of alienation, bitterness & hostility would have replaced that love & respect, but the hardest time begins the moment of disclosure,along with the fusion of emotions.
So! How you've beard the situation, please do comment.
-Fauzia Afreen