George’s good mood might seem surprising, given that Mr. Osborne is interfering in his marriage, but in fact, earlier passages revealed that George is hesitant about marrying Amelia, and now he seems glad about having a way out that he can blame on someone else. Still, the regret that George feels later seems to be genuine, showing how the novel can find sympathetic moments with characters even when they’re in the middle of taking unsympathetic actions (as George does by continuing to string Amelia along after his feelings change).