Based on the text in the thirteenth chapter of the book, do any misunderstandings occur between Penny and her mother on her Penny's birthday?

Based on the text in the thirteenth chapter of the book, a misunderstanding that occurs between Penny and her mother is in relation to the ruby necklace that Penny's mother gives her as a birthday present. Her mother considers the it to be a unique and special gift for Penny, because the ruby on the necklace came from the engagement ring that Penny's father had given to her; while Penny views the transplanted ruby as a symbol to her father fading from her life, as well as that of her mother's.