Dorothy is Joyce Price's maternal aunt. In the alternative timeline, she sent Joyce a letter, expressing her inability to help the Prices financially due to having her own medical bills. The letter can be found in Chloe's upstairs bedroom.
Thank you for keeping me updated on Chloe's condition. I can only imagine the struggle you and William are going through. I am so sorry that I can't help you with a loan at this time.
Like everybody else, I'm underwater with my own medical bills. Please give Chloe a hug and my best wishes.
Love, Aunt Dorothy