Over at the Rybak house, Mads shows off her party dress for Alec and Thayer. It's even more horrendous than Sutton's. It's like the mutant offspring of an ice skating costume, something Lita Ford wore back in the '80s, and a rabid animal that vomits chiffon. Where do they find these things? Alec tells her, "They are gonna be lining up!" Mads says awkwardly she's not quite ready for that, and Alec's, like, "Oh yeah... I nearly forgot how I almost killed your boyfriend. Ah..." Weirdness! He tells his kids to head to the party in their own car because he has to pick up some nebulous (and, I might wager, nefarious) surprise gift for Sutton. He throws Thayer the keys to one of his fancy cars and makes some off-handed digs about Thayer's clunker back in L.A. As you might recall, Alec supposedly hasn't seen Thayer since he left for L.A. This is not lost on Thayer.
Emma sneaks into Sutton's room and finds the broken picture and the fake note from Ethan in quick succession.
A little later, night has fallen as Ethan finds "Emma" in the cabin. He offers to escort her to the party to face everyone together. She pulls him in for a passionate kiss, whispering hungrily, "I want you." He pulls away, realizing he hasn't met Emma here at all. Sutton pulls him back in, and he doesn't have time to react before Emma arrives. Ethan jerks back with tousled hair and a guilty look on his face. Sutton smiles at Emma diabolically.
Ethan staggers back and Emma starts to run out, but Sutton taunts her. Ethan and Emma both fight for Emma's honor, but Sutton has several days in juvie's worth of snappy comebacks in the coffers. Emma quickly realizes Sutton won't be reasoned with and tells Ethan it's over. Sutton says that it's not over. She feels wronged that Emma took over her life and wants payback. Ethan tries to remind Sutton that she set this insane situation up, but Sutton can only see red. She goes for (what she thinks is) the jugular, "Exactly how long have you two been sleeping together?" Ethan snaps, "We didn't have to sleep together to fall in love," but Sutton isn't even bothered by that slap in the face. Emma tells them to stop. She says all she ever wanted was for them to be sisters. Sutton says she wanted that, too, but Emma screwed it up. Emma spits, "You're a vindictive little bitch." Sutton: "God, there's that twin thing again because I was just about to say that about you." With that, she marches out to see what other pots are available for stirring.