Little Mouse carried Emily Post's etiquette book with her wherever she went. Doing things the correct way was all she cared about and heaven help the person that did not live up to her expectations, unless, of course, that person was one of her off springs.
Son Mouse graduated from college and Little Mouse was very proud. Her friends sent gifts and cards wishing him well. Son Mouse refused to call or write thank you notes for all the presents he received. Little Mouse was mortified and decided to take matters in her own hands. She wrote notes for him.
Older Mouse, recognized the handwriting and immediately knew Little Mouse was the author. Older Mouse, tired of Little Mouse's constant criticism decided to mention the inappropriateness of these notes. Little Mouse got defensive and started defending Son Mouse and her actions. She claimed Son Mouse was not wrong to skip writing. He was just too busy so she decided to help him out. Older Mouse was not appeased. She knew of no etiquette book that would find this acceptable.
Little Mouse, foiled, stopped talking to Older Mouse.