Gossip Girl Season 6, Episode 2 Spoilers: Who’s Kissing Whom in “High Infidelity”? [PHOTOS]

Okay, so we’ve heard a little about this character, Sage, played by Sofia Black-D’Elia, but we don’t know exactly who she is. Apparently, she is someone who kisses Nate (which doesn’t narrow it down at all — Blair, Serena, the Countess, Diana, Lola...). The question is, why does Barry Watson look so stressed out about it? The episode is called “High Infidelity.” Who’s cheating? All we know is that Serena and Steven are NOT wearing wedding rings.