How many?

I went to Target with my friend Maria during lunch today. I had my first "when are you due?" question from a total stranger. She was working at the check register next to ours, and said: "When's your baby due?" It was more of a command than a question, so I immediately responded: "December 30th, ma'am." She looked at me and said very loudly "How many?" I looked right back at her and said "Huh? Um, December 30th?" She looks at my belly and makes some kind of noise with her tongue, as if to imply that I'm lying because I am way too big to go another 3 months, then says "Damn! You big! You look cute though!" I just laughed, and told her I was thinking the same thing! She asked me if I had heard about this woman in Vallejo who had used a surrogate when she and her husband had tried for years without getting pregnant. She said the woman ended up getting pregnant and the surrogate's babies and her baby were born 1 week apart. She had 4 kids all at once! She said to me" How come she didn't cancel her order when she found out she was pregnant?" I really couldn't answer that one.