Well kind of, Chuck is asking Blair how Marcus is in bed. Then after that he keeps asking her how he makes love to her, and what does he do to her. Then they block it out a little, while Chuck kisses her neck. And then you can hear Chuck say to Blair, have sex with me. They do block out quite a bit of it though, that was the plan. Hope this has helped.
I cant believe he whispers that to her, i cant hear a thing even with the volume full blast! I always thought he was just kissing her! But if he did say that, it's just so hot!