'Big Love's' Cassi Thomson on Cara Lynn's affair, the finale and what's next

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As HBO's "Big Love" careens toward its season finale, Cara Lynn's drama is factoring quite heavily into the family drama. Bill's ( Bill Paxton) newly adopted daughter has been carrying on an affair with her teacher, a man 15 years her senior, and they've just been discovered.

"She's having a rough time," Cassi Thomson, who plays Cara Lynn, tells Zap2it. "It's her first love, really. She's head over heels for this guy. I think a part of her knows that it's not quite right. And it won't blow over easily."

Does any drama blow over easily in the polygamous Henrickson home? Resolution in "Big Love" usually arrives with casualties, literally and figuratively. And we suspect that Cara Lynn won't make it easier on herself or the family.

"She's her mother's daughter and manipulation is in her blood," Thomson says. "But, I think Cara Lynn has more a of a conscience than Nikki [ Chloë Sevigny] does about what she's doing. I feel like Nikki is very naïve and does things on impulse. Cara Lynn is really smart. She manipulates people in a way where it doesn't look like she's in the wrong, kind of in a coy way."

With the finale nearing, viewers may be worried about how the series will wrap up, especially with so many difficult storylines to resolve. Thomson tells us that while the finale will shock viewers, they'll appreciate the way the series makes it exit.

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"I thought it was all wrapped up pretty well. And I really enjoyed it," she says. "And I think fans are going to be happy with it. There's a lot of fans who say, 'How are they going to wrap it up?' and 'There's so much going on.' I felt the same way, but I'm really happy with it and I think the fans will be happy with it, too."

In the course of playing Cara Lynn, the actress says she has learned a lot about plural marriage. "When I first got the role, I did a lot of research on their lifestyle and it was an eye-opener," she says.

"I didn't realize that it was still going on so heavily," the 17-year-old continues. "With all the research that I've done and playing it as a character, I definitely get the appeal of being in a family where there's a lot of family members who love and care for you, where you're never by yourself. I definitely see the upside. Then, there's also the problem of underage marriages and other stuff like that, which definitely aren't acceptable to me in my life. So, I've come to understand it, but not necessarily accept it or want to live my life that way."

Now that "Big Love" has wrapped, Thomson is looking to the future. She's currently auditioning for TV pilots. And her Hallmark Channel movie, "Rock the House," premieres in June. In the TV movie, Thomson plays a teenager who tries to salvage her relationship with her busy attorney father (played by "Heroes" star  Jack Coleman) through their mutual love of music. She's also guest starring this season on CBS' "CSI: Miami."

Don't look now, but we think she's an actress you should keep an eye on. Get to know Cassi Thomson:

You've released several songs. Are you working on a full album?
Right now, I'm in the middle of pilot season and was busy on "Big Love." Acting is my main focus right now. I haven't been working on music as much as I'd like to be. I am working on an album. I have six songs that I've done, so it's about halfway done right now. 

Do you have any actresses or actors who you look up to?
I've always been a big fan of Rachel McAdams. I saw her for the first time in "Mean Girls," then I saw her in "The Notebook." I've always wanted a role like "The Notebook," this heartfelt love story. I think Rachel's so incredible.  

Lots of young Hollywood are jockeying for a role in "The Hunger Games." Is that something you're interested in?
I would love to be in "The Hunger Games." I'm one of the few people who haven't read the books, because unfortunately, I'm not a big book reader. I do read a lot of scripts and I read the script and I loved it. So, yeah I'd love to be in "The Hunger Games." I'm pretty sure it's going to be a big deal.

My friend who read the books tells me that I could play Foxface. She thinks I have qualities that fit Foxface. So, that's a character I guess I'd be a fit for. It would be awesome to be in "The Hunger Games."

"Big Love" airs Sundays at 9 p.m. ET on HBO.