Reality TV star Khloé Kardashian is in tears over brother Rob Kardashian‘s daddy duties.

KK went to Instagram this past weekend and reacted to Rob scolding his fiancée Blac Chyna‘s son for cursing.

Screen Shot 2016-08-22 at 6.22.43 AM

Chyna unleashed must-see footage Saturday (August 20) of Rob teaching her son King Cairo about the dangers of using profanity.

#PressPlay #RobKardashian wasn't here for it! 😩 Catch more tea on our Snapchat: TheShadeRoom

A post shared by The Shade Room (@theshaderoom) on

Last week, vixen Amber Rose shouted out Blac and co-signed her upcoming “Rob & Chyna” reality TV series.

Screen Shot 2016-08-16 at 11.38.31 AM

Details have developed on potential “Rob & Chyna” storylines.

Production sources tell us fight topics range from Rob’s diet to social media and lots in between, including money and fame. Very little is not filmed … we’re told cameras are rolling for up to 13 hours a day, 5 days a week. The tension has become increasingly exacerbated by Chyna’s pregnancy. We’re told producers are chuckling at stories that Rob is now running hot and cold on doing a reality show. We’re also told it’s just caused more conflict between the 2, and the result is really good TV. (TMZ)