So what I was thinking was you have the whole scenario of either teenagers or unmarried couple where the pregnancy comes as a shock/surprise to the woman, but when she tells the guy, instead of him doing the typical freaking out, he loves and it is more excited than she is! 

Eventually he confesses his attraction and makes her feel wonderful which leads to a happy ending. 

I know...not very realistic, but hey fun to imagine. If anyone has any stories or comments that would match this, pm or post below.