Kim Kardashian West Confronts Brother in ‘Rob & Chyna’ Supertease: ‘Depression Is a Serious Issue’

Rob & Chyna premieres Sept. 11 at 9 p.m. ET on E!

Buckle up: The Rob & Chyna rollercoaster is about to take off.

In the first supertease for Rob Kardashian and Blac Chyna‘s upcoming reality series, the couple experiences everything from sweet moments to explosive fights as they prepare to welcome their first child together.

“Are you ready to be a daddy?” Chyna, 28, asks Rob, 29, in the clip released by E! News.

The two go on to kiss and cuddle, rubbing Chyna’s growing baby belly and playing with her son King, 3, whom she shares with ex Tyga.

Rob hits the gym and spends time with sister Kourtney Kardashian‘s ex Scott Disick, 33, who marvels at how Rob has emerged from his formerly reclusive lifestyle since his relationship with Chyna began.

“I feel like this is the first time we’ve hit the streets together in a long time,” Disick says. “It’s almost like [you were] in jail!”

“It’s a big change to go from being inside for like, four years to now being outside,” admits Rob.

The trailer flashes through nights out at the strip club, pool twerking sessions and family dinners with the Kardashians (including Kim, Khloé and Kourtney), but the mood quickly darkens as Chyna and Rob begin to question each other over certain text messages.

“Yo, who’s this hittin’ your phone over and over?” Rob demands.

“Why do you want to keep going through my phone like you don’t trust me?” asks Chyna.

We even get a closer look at Chyna’s now-infamous “texting bitches” eruption.

“What are you still texting other females about?” she demands, before shouting: “I’m not f—ing playin’ with you! Why the f— are you still texting bitches?!”

Rob attempts to make it up to her with flowers – “I just wanted to apologize” – but Chyna is having none of it, making a point to rip the bouquet out of the vase and toss it into the pool outside.

“I don’t know why he thinkin’ it’s a game,” she warns, as Rob turns to his family for advice.

“The whole arguing is too much,” he says. “She’s too hot and I’m too hot.”

“Everybody argues in a new relationship,” reassures mom Kris Jenner, 60.

“We’re just two different people,” Rob tells Disick in another scene. “I don’t expect her to be like me.”

“I don’t even know that you know exactly who you are,” Disick tells him.

Chyna struggles too, crying as a friend tells her: “I know you’ve been through a lot, but you put that wall up to protect yourself.”

The trailer also touches on Rob’s battle with depression.

“What could I do to help?” Chyna asks him. “What really triggers you to go into a dark hole?”

“Depression is a serious issue,” says Kim, 35, sitting down with the couple. “What’s going to happen when this baby is born?”

Keeping Up with the Kardashians has its midseason finale this Sunday at 9 p.m. ET, and Rob & Chyna premieres Sept. 11 at 9 p.m. ET, both on E!