The responsibility for recording a marriage has always been up to woman. If it wasn't for her, marriage would have disappeared long since. No man is going to jeopardize his present or poison his future with a lot of little brats hollering around the house unless he's forced to. It's up to the woman to knock him down, hogtie him, and drag him in front of two witnesses immediately if not sooner. Anytime after that is too late.
The trouble with kids is they always figure they're smarter than their parents - never stop to think if their old man could get by for 50 years and feed 'em and clothe 'em - he maybe had something up here to get by with - things that seem like brain twisters to you might be very simple for him.