There are options available for people that want to have a family, and god knows there are far to many children out there that can really, really use a loving parent or two.
As a father of two I may come off as smug here, but I can tell you that the first year of a child's life is more going through the motions. The following years are really where you can make a difference, and where they certainly make a difference in you.
I seriously hope once they are over their grief period, that couple takes your advice. A child out there could have his life changed forever because of it.