Thou shalt not talk about everything under the sun. Agree to disagree, and steer clear of controversial topics. Parents shall not use intimate details of their kids' lives as conversational fodder. Thou shalt not reveal devastating family secrets about thyself or others unless thou hast arranged therapeutic support systems. Thou shalt not publicly criticize the bad manners or poor behavior of any child not thine own.
All nieces tap dance divinely, all babies are beautiful, and all aunts look as wonderful as ever.