It is amazing how many people don't have that shut off switch in their heads when it comes to knowing what is not appropriate to say. I have had so many rude and downright mean comments about my twins. The "better you then me" one makes me
! I always look them in the eye and with a very deadpan tone say "You're right...it IS better me then you." Ugh!!! Another one I hated when I was pregnant was when someone asked my due date and when I'd tell them they'd comment about how big I was...then when I'd say I'm having twins they'd then say "Oh, you're not very big for twins".
Don't let the rude comments get to you. Stay confident that you CAN and WILL carry these babies to term and show all of them just how very wrong they were.