JE1 / WENN 1 / 7

Based on the first preview for Rob Kardashian and Blac Chyna's new E! reality show, there's a lot of explosive fighting in store.

The clip revealed the reason behind the pair's July argument, leading Rob to delete all of his Instagram photos -- other women?

"I fell in love with you because I know how good you are and how loyal you are," Rob started out telling Blac Chyna in a scene from "Rob & Chyna" via E! News.

The drama quickly intensified in a new scene with the pregnant bride-to-be questioning her man. "Are you still texting b----es, yes or no," she yelled.

The preview also showed her angrily chucking a bouquet of flowers into the pool and locking Rob out of the house.

According to sources at TMZ, there's a lot more arguing where that came from. Their dramatic fights will apparently be the center of the entire series.

They get into it over everything from Rob's diet to social media, and filming the show made it all worse.

Long 13-hour days in front of the camera each week and rumors that Rob is over shooting the series all together, only caused more fights between the couple.

But, there were a lot of sweet moments from the lovebirds to balance out all of the drama. The clip shows the duo laughing together and showing some major affection.

At one point Blac Chyna asks Rob if he's ready to be a daddy while he rests on top of her belly. He sweetly replied, "That's what I've always wanted."

Catch "Rob & Chyna" starting on Sunday, Sept. 11 at 9 p.m. on E!.