Oh thats so sad, its weird how even when you dont know them you get upset when a baby dies. Bless ya, I'm sure you were lots of help to your sister in law. Just another little Angel for heaven. xxxx
You won't know my name,but we have met before, I am so sorry to hear this sad news, it is very distressing, I wish you all well,and hope the pain fades after a while,thinking of you and you family, xx
If it's of any help - particularly if the family is religious - there's a poem that begins "I'll lend you for a little while a child of mine...." that may be of some comfort.
It won't stop the tears, as I know only too well, but it maybe worth looking at anyway.