The quote reflects on the unique understanding between two people who share a deep emotional connection. The reference to a "lovers' shorthand" suggests that my mother and Joe communicate effortlessly through subtle gestures, indicative of their closeness. This raises questions about my mother's past relationship with my father, hinting that their connection may have lacked that intimacy, leaving her in a constant state of trying to understand him.

This contemplation reveals a complex dynamic in familial relationships, contrasting the ease of communication between lovers with the challenges faced in a marriage. It suggests that love can evolve into a language of its own, which may not always translate well when one partner is left deciphering the other's intentions. Through this lens, the quote emphasizes the intricacies of love and understanding within relationships.