When exes attack! Emily Thorne's entangled web is growing, but this time her red sharpie is being used against her! The Hamptons socialite (Emily VanCamp) continues to avenge her father's death on Revenge, but as Season 3 revealed in its premiere last week, she will also be fighting off some enemies -- including a past lover.

In a new sneak peek for Episode 2 of the ABC series, Thorne's ex Aiden Mathis (Barry Sloane) is back in town and ready to team up with her biggest nemesis, Victoria Grayson (Madeleine Stowe).

Aiden may have been close to telling Emily's fiance Daniel Grayson (Josh Bowman) at the end of Season 2 about her true Amanda Clarke identity, but his loyalties seem to now lie with the Grayson matriarch.

"Three days ago you reemerged claiming a vendetta against Emily Thorne. I don't usually trust people who tell me exactly what I want to hear," Victoria says in the new clip. "Our history pre-dates to the Hamptons," Aiden replies. "There's a great deal about that girl you don't know."

Check out the rest of the sneak peek of the episode "Sin" above! Revenge airs Sundays at 9 p.m. on ABC.