I think of it like this-I wasn't even really supposed to have kids, because learning from the two I have, my body doesn't support the creation of another life very well, so I view my boys as a true gift and blessing and nothing will change that view. I look SO forward to being a grandma (not too soon though!) that if this were the only way, then so be it. My heart is on my boys having lots of babies of their own, so I can spoil them the way my grandparents spoiled me (once they got over the issue of my mom being preggo at 16). My grandma even named me (my first name, anyway).
If you can't change the situation, you learn to accept it and take what you can get. I will do my damnedest to instill in my boys the importance of waiting until marriage to have children (or sex for that matter), but they are ultimately their own persons and will make their own choices, many of which will be mistakes. I will love them no matter what. I make sure they know and hear it every day.