I think that Amy is just a malignant narcissist who profits off of showcasing her sisters artwork so that she can pretend she gives a shit about anyone or anything besides herself, her reputation, and her finances. These works of art should be placed somewhere like the Warrows basement of cursed items, not in a gallery that just anyone can walk into.

Truthfully, I think that Amy used to get the ultimate power trip by knowing that she had the key to ending all of humanity as we know it. But, I think that she's tired of.the burden now and is setting you up to be the scapegoat for why the end of the world comes.