Kristen Stewart, the 19-year-old star of the Twilight franchise, knows that she can come across as sullen and self-conscious in the public eye. But during an exclusive EW roundtable in Vancouver, Canada, where the cast was prepping for their last week of the Eclipse shoot and then the immediate onslaught of publicity for the November 20th release of New Moon, Stewart was funny, quick and outspoken in a wide-ranging conversation with co-stars Taylor Lautner and Robert Pattinson.

Asked about the endless rumors of her supposed off-screen romance with Pattinson, for instance, Stewart got nicely fired up. “I probably would’ve answered it if people hadn’t made such a big deal about it,” she said. “But I’m not going to give the fiending an answer. I know that people are really funny about ‘Well, you chose to be an actor, why don’t you just f—ing give your whole life away?! Can I have your firstborn child?’”

Pattinson himself, who clearly loathes confrontation, tried to softly interject with philosophical statements about the need for an actor to hold onto his individuality. But Stewart cut him off. “I’ve thought about this a lot,” she said. “There’s no answer that’s not going to tip you one way or the other. Think about every hypothetical situation: ‘Okay, we are. We aren’t. I’m a lesbian.’  I’m just trying to keep something,” she said. “If people started asking me if I was dating Taylor, I’d be like ‘F— off!’ I would answer the exact same way.” Without missing a beat, Pattinson looked at Lautner, promising “Me too.”