Yup, I agree with haaza123. My sister in law is pregnant with #2... I just m/ced for the second time in Sept, she knows about both... but during thanksgiving, she kept commenting about her current pregnancy. It was hard for me because I was very sensitive on the inside, but on the outside, I looked like I was completely over it. Nope. I cried in the bathroom.
I could have gotten really angry with her "showing off" her pregnancy, but I turned the situation around and decided that she is only extremely happy for herself and isn't being extremely careful around me because I look so normal on the outside.
I guess what I'm trying to say is, try not to take it too personally. I'm sure they don't mean to flaunt in front of you. They're just so consumed in their excitement.