Planning for postpartum and my mom's previous obsession with weight

I'm expecting my first in three months and my Mom lives far away (she has to fly in to visit) and offered to come and help (not immediately after birth, but like 2-3 weeks after, when I've bonded with the baby). Beyond my partner, I have no support system here so I'd very grateful for the help and would love to see my Mom... but she has a history of being quite obsessed/unkind about my weight before the pregnancy (I'm NOT overweight but my weight fluctuates when I'm stressed and I was, so every time I gained it I'd have to listen "advice" and harmful comments about losing it immediately and it only stopped if I did). We had discussions about it but you know, it never fully stopped. She visited recently when I was 2nd trimester, nothing was spoken about pregnancy weight gain, and I'd love to believe that she changed, but she commented on a plan to lose it postpartum (which I plan to do... IN MY OWN PACE). I worry that she'll start making comments again when I'm postpartum and hormonal and snappy; but I also worry that I'm over-worrying and over-reacting (like, maybe it'll be fine; I'm just concerned based on the pattern of behavior from 2yrs ago). Do you have moms who were like that and any advice about navigating situations like this?