During a Facebook Live Q&A, Rob Kardashian and Blac Chyna opened up with adorable details about their relationship. Naturally, one of the questions on many fans? minds was if Chyna has been having any crazy pregnancy cravings. She was a bit bashful at first with her answer, but fessed up to loving philly cheesesteak and P.F Changs. Chyna isn?t the only one needing late-night delivery, though ? rob likes to use Postmates to bring the food right to the front door. Rob proudly admitted he had delivery every day. Chyna jokingly asked what his postmates bill was. Rob?s answer? "I think one month it got to like $13,000.?