Rude Comments from Mother

Anyone else have a mother that just loves to make comments on your body? My mom has been like this my whole life and it drives me crazy. My husband has started noticing it lately especially with me being pregnant. Every time I see her she comments on how big my stomach is and that I'm gonna have a big fat baby. I keep telling her I have an average size bump and my baby is average size too. I've only gained 12 pounds but she makes it out to be I'm a whale. It drives me crazy. When I tell her to stop she says "oh don't be so emotional" I was recently diagnosed with GD, so being told I'm having a huge baby is kind of a trigger for me. I don't want to hear that, and it's quite frankly it's rude. But she doesn't stop despite what I tell her. Anyone else going through this?