Whenever two people come together and their behavior affects one another, you have etiquette.

Writing career
When her two sons were old enough to attend boarding school Post began to write. The couple had two sons Edwin Main Post Jr. She is the author of Do I Have to Wear White? Emily Post Answers America’s Top Wedding Questions (Collins 2009) as well as Emily Post’s Wedding Parties: Smart Ideas for Stylish Parties From Engagement to Reception and Everything in Between.