Good - er, rather "excessive" - grief Prudie!
Counselling two brothers to air out the fact that there was insufficient display of grief following the miscarriage of a 12 week pregnancy is ridiculous. Whatever happened to the "16 week" rule; i.e., don't announce the pregnancy until then? Making babies is a difficult task, and nature often makes mistakes, which it corrects with early miscarriages. Hence the "16 week" rule.
A first trimester miscarriage is certainly a sad event, but it should be viewed from the perspective that "nature knows best." My partner and I suffered three first trimester miscarriages, including one after we had announced (too soon), and after we had seen the first ultrasound...with the tiny beating heart. Our close relatives were very kind and supportive - I recall a quiet afternoon over a cup of tea - and one or two subdued phone calls, but "grief" does not come close to an accurate description of our, or our relations' response.
We now have three happy, healthy, rascally children and are grateful for it.
Contrast our experience, and the experience of your correspondent with a couple we know who twice lost a baby in the range of 40 weeks. Now that was a grief situation.
Your correspondent and her husband should grow backbones? They're going to need them when life throws them something truly worth grieving over.