If you love, or even like the pregnant woman in your life, just don't ask her that first question. Please. Yes, you may think it in your head, but keep it there. We are all sick of hearing it. We will get married in our own time, we when want to.
I know more not-married moms than married ones (I hate the word single, because it portrays the idea that Mom is alone and some of us aren't). We got a wonderful surprise and decided that getting married during this time was not what we wanted. Why would we rush getting married? I want to have time to plan a wonderful wedding and be able to fully enjoy it (So sue me, I want to be able to drink at my wedding)! I want to have E at a point where she has weaned (on her own time) and Casey and I are comfortable enough to be away from her. She is my main concern, not myself.
At the end of the day E has a Mommy and Daddy who love her very much and she has no idea we aren't married.
This is for all the Mommy's out there who have heard that dreaded question!