I had my first when I was 36 and my second when I was 39 so not young. I've never had stretch marks, however, the skin on my stomach is a bit 'loose' when I am sat down IYSWIM. When I am standing up it's not noticeable.
I was curious if others have the same issue? I am a very similar weight now to before pregnancy (I'm a few KGs lighter now).
It's not something I lose sleep over, I was just curious. I assume there is nothing that will help (but if anyone has any wonderful fixes, let me know! 😂)