Her reason for giving tells you that there are no strings attached. You can write her a letter expressing your gratitude for thinking of you. And if there is too much for your family, share with others who nave need. You could even write her about that, letting her know that her gift helped others she doesn’t even know.

I have a feeling she would appreciate that even more than being in a position to help you after she lived through being unable to help others. She doesn’t need to know you didn’t need it.