Small hips?

So, I’ve made it known to some people that I would like to try and have birth naturally. I’m not saying I wouldn’t get an epidural but I would of course like to go in trying not to! Buuut, I have someone who keeps on making negative comments that are stressing me out..

My boyfriends mom keeps making comments like I’ll probably have to have a C-section because I’m so “small” (I’m 51, 150 pounds 20 weeks pregnant) .. this is just very discouraging to me I feel. Like she already has her mind made up that I’m not going to be able to do it. She also made the comment yesterday that my hips are too small and I’m not going to be able to give birth vaginally. Is this a thing?

I never thought of myself as all that small and my hips aren’t wide but they aren’t tiny either. So what do you guys think. This is my first baby, & she’s constantly stressing me out about the birth of MY baby.