"Awesome! Like, Krista, thank you so much. I..." she started, but Krista spoke quickly cutting her off.
"But, you can't leave now," she said, and Callista thought of her mother and felt a familiar, bitter feeling, "You have to stay for the rest of the hour. And I think, since I am being so friendly and you wanted to make a deal, that you owe me."
"What?"
"You just have to accept that you owe me, you have to do what I want for this extra hour I am giving you. That's what you get in exchange for a free half hour and an hour of not doing work."
"Oh come on Krista, you said yourself that it just makes sense, why should I have to do anything for you?" Callista whined.
"Okay, so open your book to..." Krista started, arching her eyebrows and looking at Callista. Callista sighed and rolled he
