Life Unexpected Life Unexpected

While the relationships between characters were messy in Life Unexpected's first season, things are about to get even messier: In Season 2, Cate (Shiri Appleby) and Ryan (Kerr Smith) will be navigating their new marriage, Baze (Kristoffer Polaha) will deal with rejection, and Lux (Britt Robertson) will dive head-first into a May-December relationship.

Life Unexpected creator Liz Tigelaar: "Cate and Baze aren't over"

Season 2 opens on Lux, Ryan and Cate's return from the big honeymoon — but not all is well in married land. "Cate and Ryan are dealing with very grown up issues in beginning a marriage," says executive producer Liz Tigelaar.

"Every happy couple isn't happy for that long," Robertson says. "There's a lot of secrets that are revealed about both of them and they're learning how to deal with it, and if they can deal with it. There's some stuff from Ryan's past that hasn't been revealed either, and he isn't the perfect guy that Cate thought he was."

They're not the only relationship evolving this season. Says Tigelaar: "They're still all the same immature f---ed up people they always were, but on scale, they've grown up a bit."

Exclusive Photos: Go behind the scenes with the cast of Life Unexpected

Even Baze will move on from his failure to stop Cate and Ryan's wedding with the introduction of Emma, (Buffy alum Emma Caulfield).

"Baze is so desperate to move on from Cate that he really needs a new relationship," Tigelaar says. "It starts as a hate-hate relationship, but they definitely have sparks. She has a lot of walls up and has a lot of reasons for not wanting to be involved with him."

As for Lux, an interesting proposal will send her running away from Bug and into the arms of a new teacher named Eric (Shaun Sipos). "It's a very platonic relationship that gets out of hand," Robertson says.

Missed an episode of Life Unexpected? Catch up with our recaps

"They feel something instantaneously for each other," Tigelaar says, adding that the attraction between them springs from Lux always relating to people older than her; she's an old soul herself. "Lux is going through her own struggles this season and hasn't had a lot of people who have consistently been there for her, so he's a person who really wants to do that."

"It'll be about how they have to abide by these rules," Tigelaar continues. "Lux so badly wants to be a normal teenager, but when she bumps up against continually trying and not feeling normal, she throws her hands up and goes to the other side of it. Certainly, pushing to get involved with somebody you shouldn't is not normal."

Life Unexpected premieres Tuesday at 9/8c on the CW.