Of course. It was silly of her not to immediately expect conflict. This whole friendship thing started to look petty when compared with her current dilemma, however, and that gave her the strength not to just get up and leave. Hermione looked up and prepared to say something righteously indignant, but when she opened her mouth what came out was, "I know." And she did. She really did owe Sirius, and Lily, a good reason. An apology. Something. Her conscience would not allow her to ignore that even if she was doing the right thing, she was wronging them.