Big Daddy! Overweight Rob Kardashian's Diet Has Been Destroyed By Blac Chyna's Pregnancy

Rob Kardashian's diet has hit a [baby] bump in the road!

Earlier this year, Rob was on the fast track to fitness, losing over 40 pounds as Blac Chyna dedicated her energies to training him in the gym and preparing him lean meals in the kitchen.

But now, following the couple's pregnancy announcement, a source says that Rob's weight loss plan has crashed and burned!

"Rob's been eating like a pig ever since he found out the news," an insider told Now magazine.

"He's thrown in the towel with the healthy eating and exercise has gone out of the window."

"He's taken 'eating for two' literally," the source continued. 'It's such a shame because he was doing so well."

However, as Chyna's pregnancy cravings have kicked in, Rob has been faced with some tough temptation. "Rob's taking full advantage of Blac's food cravings and is happily gorging on Krispy Kreme doughnuts, In-N-Out's burgers and Chinese food," the insider claimed.

"It's a really worrying sign because his family thinks he could be slipping back into his old ways. Blac won't let that happen, but right but she's got too much on her plate to worry about Rob."