Gossip Girl Star Teases Tonight's "Pivotal" Finale: "Tough Choices" Will Be Made!

Exclusive! Kelly Rutherford says she was shocked by Bart Bass' return to the CW hit, telling us, "II wasn't sure if they were kidding me!"

You thought the love triangle between Blair, Dan and Chuck was complicated on Gossip Girl?

We're pretty sure that it pales in comparison to newly resurrected triangle between Lily (Kelly Rutherford) and her two husbands, Rufus (Matthew Settle) and Bart (Robert John Burke). That's right: Lily, Queen of the Upper East Side, is technically a bigamist now that Bart has returned from the grave (or, you know, his hideaway in Europe).

So what will Lily do now that she has two husbands on her hands? And should fans be worried about Rufus and Lily's already-on-the-rocks marriage? We chatted with Kelly Rutherford, who tells us some "tough choices" will be made in tonight's season finale...

"A lot of the characters are having major things happen in their lives; it's a very pivotal time," Kelly says of Gossip Girl's season ender. "I think with Bart back, it really has changed my dynamic with my husband. I think everyone's going to have to make some choices, so it's going to be very interesting to see what choices they make....I think everyone in the finale is really having to deal with some tough choices."

Lily has yet to come face-to-face with her not-so-dead husband, but Kelly teases that that will change in tonight's episode, which will also put Lily in the same room with both husbands at the same time. Talk about awkward! "I think it's a mixture of things," Kelly says of Lily's reaction to Bart being alive. "She's obviously in shock that he is alive, and I'm sure there are feelings of, 'Why wasn't I told about this? Why didn't I know about this?' At the same time, probably a lot of excitement and relief that he is alive after all this time and a lot of questions that need to be answered. That's got to be the craziest thing to ever happen to someone!"

Bart's return comes at a very fragile time in Rufus and Lily's marriage, as the two are in the midst of their worst fight ever and aren't living together. Could Lily possibly fall for Bart...again? "The timing of it couldn't be crazier, because after everything they've been through this season, I think she's questioning a lot of her life and her relationships," Kelly explains. "Rufus is definitely one of them and where his loyalties lie. I think Bart coming back, the timing of it couldn't be more odd in terms of where Rufus and Lily stand, which will make for some interesting decisions."

Prior to all the craziness (Lily's mother dying, Ivy taking their apartment, Lily cutting Rufus off, etc.) that has gone down toward the end of season five, Rufus and Lily were the show's anchor, the one relationship that seemed destined to survive all the backstabbing and scheming. Kelly says she's enjoying the shakeup in their marriage, saying, "I think it's normal .I think it's real. I think to pretend that life is perfect and two people get along all the time is not real. What I love about the show is that the adults are real; they aren't pretending to be something else."

So how and when did Kelly find out that Gossip Girl was planning on "resurrecting" Bart Bass? "There was some little rumor going around the makeup room. I heard and I thought, "Oh, I'm not going to run with this because they can't be serious!" she says. "I wasn't sure if they were kidding me. It probably started a couple of weeks before I read the script and found out he was going to be back. I was very excited."

Gossip Girl's finale airs tonight at 8 p.m. on the CW.