Just want to clarify your comment. Anna wasn't adopted. Her brother was. Hence, "growing up with an adopted brother" Also when I was talking about killing and humane I said that by having an abortion it was one of the most humane ways of killing vs. torture and then killing. Stuff like that. Hope that clarifies.
Hi! Maybe I didn't make it clear enough, I'm sorry :) But like, he only needs her to be his 'gf' for that night, where the event would take place. She didn't spent the whole day sketching per se, and she did all these things to distract her from the 'yes'. By saying 'yes', Nick basically implied that he needs her to be his gf for the night because he has confidence that the meeting will be a success - or it could mean that he failed and he needs moral support from her.