I thought your female customers were trophy wives and existed on water, air and salad. You mean to tell me that you have a female customer that actually eats FOOD? And obviously eats enough to grow herself a rounded potbelly? What trophy wife category does THAT fall into? Bubba the methhead toothless red neck that won the lottery?
I only did that once! And had it happen to me several times. Once about a month or 2 after birth of Son #1. Yup it is embarrassing both ways. It is something I no longer ask. That or say " Cute Boy/Girl" (Can't count the times I got it wrong.) Baby is generic and work just as well.
I've been asked that quite a few times by the elderly in nursing homes I've worked in...I just smiled and said, "Nope, I'm just fat."
My niece has pancreatic cancer that is cycling down into the last stages, which has her rail thin but with a distended abdomen. The most upset I've seen her throughout this whole thing is when the other day someone asked her when her baby was due. You'd think she'd be more upset over her terminal condition, but nope...was very emotional because her belly is big and they can't do anything about it.
It's safer just to speculate but never, ever ask. If people want you to know they are pregnant, they'll either tell you or wear a shirt saying they are, but I NEVER ask.
I have a list of things to never ask women even women I know. How you think I lived this long.
I started getting grey hair in early 20s. When my youngest daughter was toddler and I still in my 20s I would get mistaken for grandpa here and there. DW said it was only when I was wearing my construction costume lol.