So here's the rest of the story from "Choose Your Own Adventure" (below):
I first thought that I might be in trouble while I was standing in line. There was a lady behind me with her three year old, and she told her three year old to be very careful and not bump the lady in front of her because she had a baby in her tummy.
I had left the realm of "Is she pregnant or isn't she" and my most unmaternity maternity shirt wasn't fooling anyone. No even a total stranger.
So when the young girl running the ride asked if I was pregnant, I just confessed. "Eeeeyyessss."
I looked at Emma in terror. She really wanted to go on this ride. She liked it a lot.
The car of the ride holds four people, and the nice lady and her three year old were behind us. I asked if her three year old could sit by Emma and she could stay in the back. And I got off the ride and hoped for the best.
Emma had a great time.