The spectrum of reactions to the news that Rebecca isn't biologically a Walker goes like this: Kitty's the nice one, Justin's still brattily angry, Sarah uses it as an excuse to go an infinite number of rounds with Holly, Kevin wonders why everyone's not talking about him, and Nora is emphatic that Rebecca is one of the family, DNA be damned.
As for Kevin and Scotty's impending nuptials, Scotty reveals that his parents are unsupportive assholes who won't be attending the ceremony. Kevin (accompanied by his lunkhead brothers) road-trips to Arizona to try to convince them to be good people, but they decline. Scotty's dad does give Kevin a pair of heirloom cufflinks to give to Scotty, though. Speaking of unsupportive parents, Scotty's situation gets Kevin thinking about his strained relationship with his own father. He flashes back to William, having gotten word of the death of a female business associate, trying to re-forge his broken relationship with Kevin, but Kevin mostly rebuffs him.
Sarah, meanwhile, is a woman possessed, obsessing over finding a way to prove that Holly was legally fraudulent in passing off her daughter as William's. She once again comes across that photo of Fat Baby Rebecca that started this whole secret-sister storyline to begin with. She (passive-aggressively?) returns the photo to Rebecca, who tells her that the chubby infant in the photo definitely isn't her. When Sarah brings this news to her siblings -- concluding that there really is a secret Walker sibling out there, just not Rebecca -- they brush her off as crazy.
So: Kevin and Scotty's wedding goes off without a hitch; Kitty and Robert, having once again failed to get the little lady knocked up, resolve to adopt; Saul comes out to the rest of the family; and Justin and Rebecca, after he apologizes for acting like a wad, make out on top of a mountain, but I really don't want to talk about that.
The big news, however, is that Kevin has one last flashback of his father, wherein he remembers seeing the fat baby photo in a file of William's. At the time, William said the photo was of his deceased lady friend's son, Ryan. Kevin takes this recovered memory to Sarah, and the next morning they sit Nora down and, for the second time in two seasons, tell her that her dead husband fathered a child on the side. Feel free to talk about what a jackass William Walker was all summer until the new season starts.
Previously on Brothers & Sisters, the cat got out of the bag with regard to Rebecca's status as a non-Walker, Holly bailed out Ojai Foods in a manner that looked an awful lot like taking over, Saul came out as an old, gay man, and Kevin offered to make an honest man of Scotty.
It's morning at the Walker Manse, and the whole family, save for Kevin and Rebecca, is gathered, but they're all too busy running around attending to their own business -- Kitty with the fertility clinic, Sarah and Tommy on Ojai business -- to pay any attention to Nora and her tray of freshly-squeezed orange juice. On the phone, Justin asks if Nora told Kevin, and she says of course she didn't. If she did, they wouldn't need to have a meeting, now would they? Sarah and Tommy continue to argue about Holly until Nora calls everyone to attention. They decide to proceed without Kevin. Nora tries to put it as delicately as possible, gingerly leading up to the big reveal, but since Justin is still being a total brat about everything, he blurts it out: "Rebecca's not our sister, Dad wasn't her dad. DNA: gotta love it." To my great enjoyment, nobody else shares in Justin's pissy revulsion. In fact, for the Walkers, they're all handling this pretty well. Tommy's confused, Sarah seeks clarification, and Kitty...well holy shit, Kitty expresses actual concern for Rebecca. That's new.
Of course, the good vibes can't last long. Sarah leaps at the chance to be angry at Holly, and by the time Kevin shows up, it looks like the family's going to descend into one of its trademark squabbles. Of course, leave it to Kevin to defy our expectations by being utterly, hopelessly clueless. Immediately upon seeing everyone gathered he leaps to the conclusion that Scotty called and beat him to the punch on their engagement announcement. Of course, Kevin only alludes to the wedding from side angles, so his siblings need to piece the puzzle together themselves. Kevin barrels ahead: They'd like to have the wedding at the house, Tommy can bring the wine, Justin can stay sober (let's hear it for lowered expectations!), Sarah can give the toast, and Kitty, what with her history of speechwriting, can officiate the ceremony. Everyone's like "Ceremony?" Once the news sinks in, though, they're happy for him. Nora's especially pleased there will be a distraction from their current crises, even if it does mean she has to prepare for a wedding this Saturday. Kevin finally catches wind of the somber mood in the room, and before he can get too offended, Nora asks him to sit down so she can tell him about the family's latest "little development."