8/15/2016 1:00 AM PDT BY TMZ STAFF
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.