Watch 'Keeping up with the Kardashians' Season 12 episode 9 online: Rob announces Blac Chyna is pregnant?

Admittedly, the most interesting storyline in this season's of "Keeping up with the Kardashians" belongs to Rob Kardashian and his fiancée Blac Chyna. The sock designer has stirred plenty of drama in Season 12 of the reality TV show and the latest installment, episode 9 titled "Oh! Baby" promises more.

The Kardashian siblings have been overwhelmed, neglected and hurt by their brother Rob, who proposed to the make-up artist/model without even letting his family know. When news of his engagement spread across social media, Kim, Khloe and Kourtney were visibly upset. Of course, it's never easy to deal with a new addition to the family when one is not given sufficient time to process this information.

If the siblings were thrown off-guard by Rob earlier, their emotional predicament in Season 12 episode 9 won't be any different.

The preview for the upcoming episode indicates that the sock designer will make another announcement, and this one might be a bigger shocker. Although it's unclear what Rob might say, it's safe to hazard a guess that the former "Dancing with the Stars" contestant will tell his family that Chyna is pregnant. After all, the title of episode 9 does suggest that there's some baby news along the way.

The promo clip takes a dramatic turn when Rob says, "And then there's one more thing I want to talk to you about but I don't want you guys to get mad."

Elsewhere in Season 12 episode 9, Kylie will have major anxiety issues because she's always in the spotlight. Does this call for a rant with her elder sister, Kourtney? We Think so.

"Keeping up with the Kardashians" Season 12 episode 9 airs at 9 p.m. EST on Sunday, July 3, on E! You can live-stream the episode via E! Live.