I'm so sorry to hear about your Aunt Lena. My grandma had the same thing, at a much younger age. Here's something you may want to try: Before my grandma's surgery we took some polariods of people and pets she loved. After her surgery, she found a lot of comfort in using the pictures to help her communicate with us because finding the right word/name was very difficult.

My thoughts and prayers will be with you, your family, and Lena.