Rude mother in law

My mother in law has been very rude late. She keeps calling me very fat. Every time she sees me she tells me “oh wow you are getting really fat. She tells her family members that I am very fat and next time they see me they will see me rolling instead of walking. At first I was like what is your problem. I would get really mad at her but I have noticed that she comes out with these little comments when some one complements me. Like oh wow you look to small to be 7 months or your skin looks great or you didn’t really put on weight. I’m getting a little jealous vibe from her. She only makes these rude comments in front of people who have only nice things to say about my pregnancy.