'Gossip Girl' Threesome in the Works

The producers of Gossip Girl are really pushing the envelope this season!
EW‘s Michael Ausiello is reporting that the Nov. 9 episode of Gossip Girl will feature “three major characters having sex. At the same time. In the same bed. Together.”
Threesome possibilities: Chuck/Blair/Nate, Chuck/Blair/Josh, Chuck/Blair/Dorota, Nate/Bree/Carter, Serena/Carter/Georgina, Serena/Dan/Blair, Vanessa/Dan/Olivia, Georgina/Dan/Olivia, or Rufus/Lily/Mr. Van der Woodsen.
TELL JJ: Which three characters do you think have a ménage à trois??