Sister's Lessons on Etiquette

Tank: "Braaw!"

Me, giving the look:  "We don't burp at the table.  It's bad manners."

Sister, our resident etiquette expert: "It wasn't a real burp!"

Me, am I really arguing this?: "It doesn't matter if it's real or fake."

Sister, not letting it go: "It's only really bad manners if it's a really real burp."

Thanks for clearing that up for us.