She sounds like one of those people who always needs to have a scapegoat. Very difficult to deal with if you happen to be the scapegoat-de-jour. Especially during sad times like this. I'm praying that she'll have a moment of compassion and see that the painting rightfully belongs with you.
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When you don't like a thing, change it.
If you can't change it, change the way you think about it.

(Maya Angelou)