When I worked at Banana Republic one of my co-workers wasn’t fat, but she had a large stomach. At first I thought she was pregnant because it was rather round, kind of like a baby bump. I never said anything because I figured if she did happen to be pregnant she’d certainly mention it.
Then the store security guard asked her when the baby was due. Awwwwkwarrrd.
So naturally she said she wasn’t pregnant, and more awkward silence ensued.
If that happened to me I’d be so embarrassed of my baby-o-fat that I’d go with it. I’d make up a date that sounded good and then find a way to never talk to the person again. That way the person could figure out on their own time that I wasn’t pregnant, just fat, and neither of us would be caught in an awkward exchange of silence and resentment.
Besides the fact that I just don’t care about babies, I never mention a potential pregnancy until it’s brought up by the mother first because there is always that chance she’s actually just fat and it’s not good to be on either side of that conversation.