Mom keeps telling me to loose weight

I’m becoming more and more self conscious. My mom has drilled into my head that I’m ugly unsuccessful and fat. Every time I see her she critises me and says that I don’t excersize she always sounds mad it gets to the point where I burst into tears. Problems with conceieving and she says it’s my fault basically. I’m 84kg I’ve lost over 12kg and I’m about 5”6 I have 36g cup breasts and I’m a size 12/14 I used to be a size 18. I only lost weight because I thought it would make me feel better. Anyway tomorrow is a family meal and I feel so upset already because I don’t want any more comments about my weight or how ive put Weight back on or 1000 questions about whether I’ve been to the gym this week 😭 I’ve told her so many tines she upsets me but she just-keeps doing it. What can I do? I want to go to the meal to see my siblings nan and aunties ( plus it’s a carvery and the food is so nice!)