I would say follow your heart ~ My youngest son was a twin, we lost his brother in-utero ~ so lucky to have him, so he's very much a momma's boy. I would have cried buckets during the first couple months being presented with something like that. Maybe wait and see how the parents acknowledge the loss, i.e. do they talk about him? or not? or build a memorial shrine within the home... go with what your heart tells you