What’s Proper Etiquette if I’m Upgraded and My Client Isn’t?

TPG reader Christopher tweeted me to ask: @thepointsguy–“What is proper etiquette when I get a first class upgrade because I’m Delta Diamond, and  my client is back in row 27?” Unfortunately, this question has no clear “right” answer. This used to happen to me all the time. I remember once back when I worked at Morgan Stanley,…