From a woman's point of view, it sounds like she was on a big time fishing expedition. What if you said in response to her comments about not having kids, Hey, I am ready to practice having kids anytime you are? "wink, wink". If said in a joking manner, you might get another comment that would give you a little better insight. I agree that if you still love her, then go for it, just don't overwhelm her.
Keep us posted.
Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.