((( HUGS ))) - I am sorry you had to go thru this with your mother... it sounds to me that maybe your mother is uncomfortable with the whole gay thing and not just with your friend, but with ideal in general... most probably brought about due to the era of her upbringing when people were not as accepting to that which was different from the norm........ try to hang in there and not let this comment from your mother upset you to much or damage the mother daughter relationship right before the birth of your baby / her grandchild.

IMO..... this is more about your mothers insecurities than about you or your child.