Something that will cheer her up and can be delivered within NYC.
OP: I think she would like food, something decadent like chocolate in particular. She's alone right now so it's just for her, not for her and family. Any thoughts?
Whole Foods delivers. Maybe some flowers and dessert from there?
If you are close enough to her to know the details of what she is going through, you probably know better than we do what she would like.
What was that macaron delivery company that someone on UB was always talking about?
what would cheer her up? different people like different things. I'd love food or wine, but some people will see that as hostile, or don't drink.