Harry walked in looking more dead than his dad, and Sirius frowned.
"No, stay," he said quickly. "When it's just us, he acts like he's still in school."
Belatedly, he remembered what James had been ragging him about to begin with. He'd come back from his usual morning run to Hogwarts with Schatten -- well, usual since that business with Bellatrix -- and turned into ... Stubby Boardman. He could not, no matter how he tried, get his own body back. James thought it was hilarious.