"But my preparation—"
"Pales in comparison to helping out a fellow member of the department." Dr. Ellison is done with your efforts to avoid co-teaching with Blankenship. "Unless you think your wants are more important than what the department needs?"
They absolutely are, at least to you, but you know better than to say that. "No, Dr. Ellison."
Blankenship returns the papers to the moving box. "Despite your curious reluctance to work with me, I'm sure we can make this a good experience."
Great, you've annoyed both of them.
Good Going, Bomomsay Clestenrogo