Like so many scorned Hamptonites before her, Margaux made her first official Revenge declaration last Sunday — and now, it’s time to put that plan into action. Emily Thorne, she is coming for you.

“She’s emotional, and she has nothing left to lose,” Karine Vanasse tells TVLine of Margaux’s mental state as we head into tonight’s episode (ABC, 10/9c). “She can be quite reactive, and she’s not just going to wait for someone else to take care of things.”

Just as Margaux explained to Victoria last week, the first step in her plan is to find evidence against Emily, though she’ll quickly discover that’s easier said than done.

“Right now, she only knows Victoria’s version of the facts, so she needs to prove that this girl went too far,” Vanasse explains. “She’ll realize that everyone around her is backing Emily up, so Margaux will start to ask, ‘Why is everyone protecting this girl? What is it about her?'”

Margaux will also learn that, excluding the tiny Grayson incubating inside her, she’s basically alone in her struggle. Not even Victoria, whom Margaux “respects and admires,” is offering to lend her support. (And speaking of that tiny Grayson, don’t expect to see Margaux sporting a baby bump anytime soon.)

“It’s strange because, episode-by-episode, we really only move forward one day,” Vanasse says with a laugh. “So Margaux’s really not that pregnant. For the moment, I don’t need a baby bump. I can still fit in Margaux’s beautiful dresses and pants. We’re not moving on to pregnancy fashions yet.”

Fortunately, there is one long-awaited moment we can get excited for tonight: another spectacular Margaux-Emily face-off.

“Saying I’m going to go after her is one thing, but saying it to her face is another,” Vanasse points out. “It’s a game of cat and mouse. Margaux doesn’t know everything the audience knows about Emily, so she doesn’t really know what she’s getting herself into.”

Revenge fans, how do you feel about Margaux and her plan? And how do you hope the rest of Season 4 unfolds? Drop a comment with your thoughts below.