In the book "Immortal in Death" by J.D. Robb, a character named Casto suggests that Eve may need to take care of personal matters like visiting her dressmaker or getting her cat therapy while he and Peabody deal with a murder case. His casual tone implies that he sees the situation as unimportant compared to Eve's concerns.

Eve's response, marked by a fierce smile and her retort "Bite me, Casto," indicates her disdain for his flippant attitude. She is clearly unamused by his suggestion that minor tasks should take precedence over the gravity of a murder investigation, showcasing her determination and no-nonsense personality.