What promise did Eve make to Enzo?

Eve's promise to Enzo revolves around the commitment to ensure that both Denny and their daughter Zoë are taken care of in her absence. This promise highlights her deep love and concern for her family, particularly as she faces her health struggles. Throughout the narrative, Enzo, the narrator and Eve's dog, perceives the gravity of Eve's situation and understands her desire to secure the well-being of her loved ones. By making this promise, Eve expresses her strength and determination to safeguard her family's future, serving as a poignant moment within the story that emphasizes themes of love, protection, and familial bonds. It reflects the emotional stakes for all characters involved as they navigate their relationships and challenges.