At least you don't have to hide it anymore.

Gemma's father, understandably, was unimpressed, but he begrudgingly accepted that his daughter was happy and that he was in fact about to become a grandfather. As for you, your feelings for Gemma only grew to full-blown love. The fact that you can now go out with her in public, and enjoy each other's company doing activities that aren't just sex (even though there's still plenty of it), makes you realize how much you were missing out on before. Even though it was an accident, it turns out that it was a happy accident, that changed your life for the better. It only makes sense that you tie up the last loose end.

One sunny afternoon, whilst having a picnic in the park, you pull out a small velvet box containing a diamond engagement ring and propose. She accepts of course, and the two of you have a modest wedding a few weeks later at a small chapel in town. Gemma invites a few of her friends that she's made while living in town, and her father walks her down the aisle. As for you, you barely have any friends left. Most of them sided with your ex-wife after the revelation that you knocked Gemma up, and most of your friends in town were mainly couples where the husbands, whether reluctantly or not, sided with their wives.