BW,
my mother went through the same process (they should do a study on it as it many families seem to go through the same stages) - she went from being intrusive, prying and overly interested to completely ignoring the matter, changing the subject, and making everyone else around us not talk about it either. I remember a dinner party at my parents' where my sister was 8 months pregnant, and when
DH and I got there, the conversation stopped in its tracks. I went over to my sister, who was massively
pg, and asked her how she was feeling, and she got flustered and refused to answer.
I found out later that my mother warned everyone not to talk to
DH or me about IVF, about babies or about
pg on the pain of death, so everyone pretty much just didn't talk to us all night. Way to make us feel even more isolated, people.