Weight rant

I have struggled with my weight a lot since giving birth a year and a half ago. Im the biggest ive ever been at 200 lbs right now and i just got a gym membership to try to lose some of this fat. My mom knows i struggle with my weight and she still makes jokes about it. I have an old maternity shirt i wear to bed now. It says “due in september”. This morning she made the comment that if i wore that out in public people would think i was big for being pregnant and due then...and she proceeded to laugh and basically mock me after. Usually i dont care if someone comments on my weight, but when its my mom it hurts..