"Brothers & Sisters" may have ended its second season on Sunday night but it left viewers with enough cliffhangers to mull over all summer long. One of the most intriguing involves the potential romance of Justin (Dave Annable) and Rebecca (Emily VanCamp), who he thought was his half-sister.

I gotta wonder if the writers of the show decided to make Rebecca not blood-related to the Walker clan after noticing the obvious on-screen chemistry between the two enormously attractive co-stars. They met in the middle of the show's first season when Rebecca was revealed to be the love child of the late family partriarch.

"We were both certainly aware that there was (chemistry)," Emily told me recently. "Because we were two people who had just met as well, just like these characters. It's not far-fetched that this might happen."

The two temporary siblngs had bonded from the start and you have to wonder if the writers changed the direction of Rebecca's storyline to allow for a romance.

"It's not incestious, we do find out she wasn't a Walker," Dave said, a bit defensively. "But just because she's not doesn't mean they're going to be romantically involved. Our show revolves around the family dealing with these bigger issues and obviously this is a big issue. Whichever way it goes, I think it's gonna be a lot of drama to be had."

I suggest to Emily that one way for Rebecca to become a Walker again is to marry Justin. She's already thought of that: "I know, I hope so! I want to be a Walker again so they better marry us, I'm telling you."

Dave's character could use a happy ending. He has been through drug problems, being seruously wounded in the Iraq War then getting hooked on prescription drugs while recovering from his leg injury. But in the season's later episodes, Justin is surfing again and showing far more flashes of his trademark humor.

"I was given some well-written stuff and I did the best I could and I hope that in the future there's more good stuff," Dave said. "But yeah, it's sort of nice to (have Justin) having some fun and hanging out and get a crush on your half sister."

The actor's character still lives at home with his mom, Nora (Sally Field): "Eventually I'd like Justin to get a job and move out of Nora's house but you know what, I get to work with Sally Field more so you can't really complain about that. It kinda of rocks, I gotta be honest. It's kind of amazing as an actor to look across at Sally every day. I wouldn't change anything, it's fantastic."