I just found out one of my bridesmaids will be 8 months pregnant at our wedding. I'm super excited for her and her husband! However, I have some concerns and I'm not sure how to address them. BM is super sweet but often a little naive. Her first pregnancy was high risk and she was put on 'light duty' for the last 3 months and couldn't work (Gestational diabetes with insulin 4 times a day, preeclampsia, baby growth issues). She and her husband live 7 hours away. She's already backing out of the bachelorette party @ 5 months pregnant but it's 7 hours away and I completely understand. She has said nothing about the wedding. BMs already ordered dresses and when I suggested she contact the bridal shop about getting a bigger size, she said her dress will fit fine. She ordered a dress in her regular size. The dress is not empire and has a fairly tight midsection - not much room for a baby bump.
How do I approach the dress issue? Should I bring up the option of her backing out of the wedding? I really don't want to offend her, but want to be realistic.
I am not trying to be rude or harsh, so please don't judge me. I am in a dilemma and would appreciate some sound advice.