ABC's Brothers & Sisters is a show about family -- the close but somewhat dysfunctional Walker clan, to be exact.

But things could get really interesting in the coming weeks, especially for Justin and Rebecca, whom I've always thought were just a little too close for half-siblings. Sure, she helped him through his detox/rehab after he came home from the war, and his half-brotherly love has known no bounds. But I've always suspected these two had an undercurrent of romance rippling through their psyches.

Up until now, they've always thought they shared the same father, with Justin being the son of William and wife Nora, and Rebecca the daughter of William and his lover, Holly.