"No! No! I am not going to be a Princess! I’ve already decided, that is not a thing that is happening!" Sunset stomped a hoof for emphasis. "You don't do the stuff I did and get rewarded for it."
Luna cleared her throat.
"Coup d'etats don't count when you're already on the throne!" Sunset insisted.
"Coups d'etat," muttered Twilight. Nopony appeared to notice or care.
Luna tilted her head. "They do not? According to whom?"
"Me," Sunset proclaimed, "as of now!"
"Goodness." Luna grinned. "And by what right do you claim such authority in the ways of royalty, Sunset?"
Sunset went quiet for a few moments. Nopony else in the library could completely hold back a smile. In Pinkie's case, she clearly wasn't even trying. Celestia was even worse. Finally, the newest alicorn just let her ears and wings droop and muttered, "Shut up."