Question:
Are these non-essential things (dust collectors) that she sent to you?
If so, I would just send a note saying something like - Thank you so much of thinking of us and letting us know you are ill. We will be thinking of you, too. Love, ____
If praying is what you do, you can add that to - I never know what to ask for - complete cure, to be pain free, for serenity, for enough energy to get things straightened out, acceptance - My "fall back" prayer is to ask that things work out the best for all concerned - because God knows (and I am not being facetious here) that I don't know what the best is.