Mothers and Facebook

My mom constantly posts photos of me to her public Facebook profile against my will. I'm pregnant and feeling fat and I specifically ask her not to post the pictures and she still posts them for the world to see. She guilts me into posing for the pictures by saying "this is my only grand baby, I want pictures of you pregnant." I agree only if she doesn't post them and what does she do? POST THEM. I don't want her doing this to my child especially since she refuses to set her profile to private. 
Any advice?