She wears her bras low. Her tits are always hanging low, even with a bra. Would be interesting to see them hauled up a bit higher on her chest.
She’s wearing her bra exactly as she should for her size (even if that white Curvy Kate bra she’s wearing is possibly one cup size too small for her). Her back band is low and horizontal and her boobs are encased (mostly) in the cups. If she wore the bra “hauled up” it would put more stress on the shoulder straps and likely cause her pain.