Id suggest a little self care hamper, shampoo/body lotions, face masks, slippers, dressing gown - anything of the such - a last little pamper before bubba arrives x
What about something she can likely not do once baby arrives… like going to a concert , theatre, comedy night or a nice cinema experience like Everyman and get a couch seat and food/drinks brought out etc. You could go together or get for her and partner..
An outing together? Afternoon tea?