The reality TV star, 27, sensationally boycotted Kim, 33, and 36-year-old Kanye’s Italian wedding on Saturday, reportedly due to struggling with his weight.
At first it was alleged that Rob fell out with big sister Kim, after she cruelly mocked him about his recent weight gain. But sources insist it was just his insecurities that resulted in him not attending.
His personal trainer Gunnar Peterson allegedly told US reporters that Rob contacted him almost as soon as he got home, insisting he wanted to get his old body back.
TMZ reports: “Rob is locked and loaded. Kim and Rob did not fight. He wanted to be there, but he was feeling so insecure and didn’t want anyone to see him heavier like this.
“Kim and Kanye completely understand. They love Rob and only want him to be healthy and happy.”
Last week, Rob’s other sister Khloe, 29, had to jump to his defence when he was targeted by cruel Twitter trolls about his weight.
Khloe wrote: “Some of you are disgusting for calling others names and picking on them.
“You should be ashamed of yourself. Your words are cutting deeper than you know and are possible (sic) leaving lifetime scars.
“What shallow souls some of you are. It’s sickening to critique anyone off their appearance. Grow up!”