She was truly a great person. Every one of us would be
lucky to know someone with her perspective & values. She liked you for who you are, not what you are.
The greatest man I've ever known had some difficult times in his life, too. In spite of that, he was generous to a fault, upbeat in the face of events that would shatter most and couldn't afford a cup to piss in. He was happy until the day he died. And - he made a difference in a lot of lives....as did your aunt.
Money can be a cool thing for some.... and nothing to others. Your greatest gift to her was your heart. I suspect that you would have felt better about any money gift than she would have. Revel in what you were able to experience and be grateful for the insight to recognise her innate personal wealth. Celebrate her spirit!