Neoscona crucifera
(Hentz Orb-weaver)

Beautiful pictures…..really good guess….but after looking at both pictures…..I think what you have here is a quite red Neoscona crucifera…She is likely carrying eggs which is making her look rounder than usual….the marks on her abdomen here are 2 L shapes facing each other….The marks on a Marbled orb weaver are more rounded.
This is one from the front a similar color and with similar legs
https://www.inaturalist.org/observations/133161351
Here’s a browner colored one with pics of the paired L shapes
https://www.inaturalist.org/observations/180259089