Nate: What about her?
Serena: Well, something happened the night of the Shepherd's wedding.
Blair: I think we're all aware of what happened that night.
Serena: No, something else. Something I've tried to escape but Georgina won't let me. And now she's blackmailing me.
Nate: Blackmailing you?
Chuck: With what exactly?
Serena: Well, it started when Blair thought you and I had too much to drink. She told us to get some air, go outside, sober up.