As I read your letter it makes me sad. There are no worries on what your daughter and son in law are doing.
As a mother who has lost babies herself I have learned so many things and one is everyone heals in thier own way. Your daughter is actually healing in a perfectly normal way. There are things that everyone does to honor their loved ones after the loss.
They will one day being able to not go to the cemetary or maybe they will go everyday forever. We should never tell them how to heal or do it right as they are the ones who know when their time is to not go.
They will go through so many diffrent types of emotion
one is guilt, one is anger, one is emotion. Let them cry. Let them always share their stories and never say move on.
In the bible God says there is a time for everything .
I have some wonderful resources if you need them [websites exc..] let me know.
Mary
info@heavenlyangelsinneed.com
http://Heavenlyangelsinneed.com