I’ve learned one rule of thumb: if someone looses someone dear to them, esp. a child, never question their actions, unless they or someone else is actually going to be harmed by those actions. If they want to take photos, let them take photos. If they want to hold the baby, let them hold the baby. In my home town in North Texas, we went through a spate of teenagers dying (lightning strikes, car accidents, etc.). The parents naturally came near to loosing their minds with grief. When one mother held a party/picnic on what would have been her son’s birthday and held it by his cemetary plot, no one said a word. When someone suggested to the cemetary association that ballons and stuffed animals and jerseys were kind of junking up the cemetary, they were quickly told to shut their pie-holes.
I think, to some degree large or small, grieving parents are in profound communion or state of empathy with the Sorrowful Mother and She must have a special eye on them.