S.C.
J., I do agree with the other mom's, although this happend to me and I did talk to my friend about it. I have a 4 yr old girl and a 6 yr old boy. My friend has a 2 yr old girl and she loves my son, he was born on her birthday. She always talked to him while I was pregnant. I knew she didn't mean to shut him out of everything we did together but she did. So one day last summer I just flat out told her that I could not get together with her anymore until he went back to school in the fall. She question me wanting to know why. I told her how I felt and she felt so bad. She had no idea she had been doing that. I also felt bad for saying what I said, but it all worked out with no hard feelings after the fact. It all depends on how close you are with your friend. If she's a good friend she'll appreciate your honesty, mine did.
Good luck.