He has a "secret sin" I mean , nobody knows only him, what he has done.
Do you really think that talking about it to the family is necesary ?
For example, I have had a bad argument with my sister in law. I feel compelled to ask for her forgiveness and try to do the right things.
However, if the ofense is secret, they do not know, and if knowing the facts could me even more painful, does he have to talk about those things?
There is no way to try to clean the soul in other ways? That is way I believe in Jesus. He can clean whatever is out of my control and capability. I know I need to repent and confess mi sins to God. I also have to try to make things right with the people I have offended. But many other things are left in the hands of Jesus Christ, because the nature of the sins and the consecuences are so deep that our human resources will just create more pain and sorrow.
That is the difference between believing in our own resources and believing in the power of forgivness, healing and love form our heavely Father.
Asking for forgivness to people and trying to do our best to heal what we have done is very important. But God is almighty and anything else can be left in HIS Hands.