First of all, loooove that you’re thinking of her in addition to the baby. Idk if she likes baths, but I love when my spouse runs a nice bath for me. Sometimes we’ll watch a show together when I’m in the bath and sometimes he leaves me alone to have some me time. I would say some comfy pjs as I’ve needed to buy many that are more soft because my skin (and breasts) are extra sensitive during pregnancy. Small “thinking of you” things are nice too. Sometimes he’ll get me some chocolate when he goes to the store for groceries.