That is tough. I have a friend who is the same way. When I had my cp in October after almost 1 1/2 years of trying she continued every day to tell me how sick she was and on and on about her pregnancy. I made the mistake of speaking to her because she kept avoiding talking to me about the difficulties I was having with the first mc and then the cp and her comment was "I don't think you are happy for me that I'm pregnant" so I quickly learned to be quiet and I now realize there are some friends who get it and others who don't. So hang in there and hopefully she won't do it again...or maybe you will come down with a cold and can't go
Hopefully someone else will be there who won't want to talk about the pregnancy as well.