It was very sweet of her to think and remember you. Regardless of what the final outcome will be, it's probably her way of getting her affairs in order while she's able. Maybe part of it is that she prefers the "immediate family" not to fight over her possessions when she's gone later, too. Say "thank you" for remembering you. No need to get all gushy or weepy or feel guilty about it.
When I remarked that I admired a old metal cannister set that hubby's aunt had displayed and even more so when she said that it was a wedding gift to her from my hubby's parents, she sent it along to us. I was quite sad that she sent it along so quickly but she said she wanted us to derive pleasure from it while she is still alive and who would treasure it more than us knowing it's history. How sweet is that???