I'm inclined to leave this alone, because it pretty much feels like none of our business. I'm amazed that this is OUT THERE for you to know and me to find out, actually. It doesn't really matter what I think, but you are also forming your conscience. There are married saints who have chosen to live as brother and sister, but I'm not so sure that they began their marriage that way. In one way, "openness to children" is something that can't be tested very well before marriage, since sexual intercourse is reserved to marriage. This marriage could be annulled, if either part ever wanted to, since it has never been consummated. I'm wondering how this couple expresses its own openness to children--perhaps through foster parenting or in some other way of being for others perhaps.

All the same, I don't think this is a widespread problem and you probably don't have to figure out the answer to it, unless you yourself are thinking of getting married, but never having sex!