in season 2 episode 4 Blair's boyfriend Lord Marcus is discovered to be having a affair with his step mother the duchess. Yet he does not seem to be very attracted to blair although he claims he really likes her. So then why did he have his hands all over the duchess if he did like blair. Does he like blair or why was he with her?

oh and she was really upset when she found out he had cheated on her! so does she like him?