I think a lot of people wonder how they would handle things given the same situation. Thankfully I don't have to put myself in her shoes. I only know how I have dealt with the things in my own life.
As far as Heather not screaming justice at the top of the roof one can only wonder why?
Many years ago I was put in a situation where all eyes were on me. My first husband had a very bad accident, I had three children. This in no way even comes close to what Heather is going through, but I remember holding my head up and not wearing my heart on my sleeve because the whole family was waiting for me to have a break down. I had three small children under five, I could not afford to have a break down, they needed me to be strong. Heather has more children and she has to find some sense of balance for the sake of their well being. I think if it were me I'd want to be put in a straight jacket. I'd want to go after everyone that looked suspicious. But then how constructive or helpful would that be to the remaining children.
I also understand some not all of the religious aspect, (Grandpa and Dad ministers), when she puts in in God's hands I can sort of understand, it's a burden that is way to much to bear so it's easier to take some of the load off by doing this. I have used this theory but along with it have also used the "god helps those who help themselves", meaning yes put it in God's hands but find a way to help yourself get the answers you need. Don't know if what I am saying is making sense, just some random thoughts.