I don't think i would have asked...but you have made me think. Maybe (depending on age) some children aren't all that aware of death/burial etc, and perhaps an explanation/interpretation from you isn't what this childs parent would want.

I wouldn't mind personally. I think children need to be taken to all sorts of things in life.

ETA: Will you be upset? Not prying, just if you are in tears, perhaps that will affect this child?