Anyone that has watched ABC this week has been inundated with ads for this Sunday's major Brothers & Sisters episode.

According to commercials, the Walkers will be shaken to their roots. Is the two-hour event being overhyped?

Not if you ask Calista Flockhart, who told Entertainment Tonight:

"For me it's a very beautiful storyline. There are lots of kids in the world who need homes and who need families, and there are lots of grown-ups in the world who want families and need kids."

It's not a major spoiler to reveal that Kitty and Robert's baby is born on Sunday, but the actress confirms it may not be smooth sailing:

"I think we can expect the relationship with my husband to change quite dramatically," she says. "For better or for worse, I'm not quite sure exactly which way it's going to go, but I think there will be conflict. Having a child sort of disrupts."

The episode titled "Troubled Waters" airs on Sunday night.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.