First of all if the response to her pitching a fit is to marry her, it means that he probably loves her. One of the reasons I know that my boyfriend wants to be with me. Is when I got upset about the lack of time (he is super busy) his response after about couple of hours was baby, do you want to go to dinner tomorrow. And we were just seeing each other.
If Men don’t want to be with a woman they will run for the hills at signs of clinginess. If men want to be with a woman, some even look for the clinginess. So this guy may not be upset at all that she wants to marry him. I have a super hard time believing he would marry her if he didn’t want too.
No relationship is perfect. They all have the issues.
As for the NFP thing, if she’s openly telling you this she’s probably told others and I suspect her fiancé probably knows she wants kids right away. If he is not participating in the NFP process with her as a couple learning about it together well than he has to know there’s a chance she’s not all on board with holding of children. I personally find NFP a little cultish myself too… Don’t get me wrong the deception is wrong, but who knows she just may not do it at all.
I see nothing wrong with voicing concerns. But I think you voice your concerns and then you let people make their own choice. You are not God. Your are not in the relationship with them. No relationship is perfect. There are reasons both of them want to marry the other. I have quietly expressed my concerns to some friends and a family member on some occasions. But you know what I would do after I expressed my concerns? I would be a friend and in every case I would try to rejoice with them/attend the ceremony regardless of the reservations. Going to the Priest in my opinion is too much. As is going to the guy. What if these two are really suppose to be together? Who are you to say they aren’t. And no one should stop a ceremony in an actual ceremony. if you have reservations say something beforehand. In may cases with reservation it has normally been about rushed relationships…
In some cases, my reservations have been right on. In some case they have been actually wrong or are wrong so far. People’s decision on who to marry is incredibly personal for them. If this is a guy who is wanting to practice NFP even though he doesn’t want kids right now, I would assume that he’s actually prayed about his decision to marry is praying about it. In the end, God’s going to speak to the couple and will hopefully speak to her heart about starting the relationship right.
Talk with your friend the female and ask her about starting her marriage with the best possible move forward when it comes to NFP and children. If you present it to her in that way, she may be more than willing to listen. Than if you present it in a way of the two of you definitely don’t belong together.