Rob Kardashian and his sister Kim Kardashian are reportedly facing a rough patch after the reality star skipped out on Kim’s European wedding to Kanye West.

According to Radar Online, a source says Rob ditched the pre-ceremony festivities in Paris after getting into a major argument with Kim. During the fight, Kim reportedly accused Rob of leaking negative stories about her to the media and even scorned him about his weight.

“Kim and Rob haven’t been speaking to each other for months. … She thinks he is lazy, and bringing down the family name because of his physical appearance. After arriving in Paris, Rob and Kim got into a very heated argument because she thought he was just moping around the hotel. She encouraged him to go out and sight-see, which he declined to do,” the source told Radar.

“This made her extremely angry, and they exchanged words. During the course of the argument, Rob was accused by Kim of leaking negative stories about her to the press. That was the final straw for Rob, because that is something he would never do.”

According to the source, Rob packed his belongings and left before the clan departed to Florence, Italy, for the ceremony. The source added that Rob “thought it was ridiculous that Kim’s third marriage was so over the top.”

Though much of the Kardashian-Jenner family and friends were extremely visible during their time in Paris, Rob remained glaringly absent from the pre-wedding hoopla. He was missing from basically all pictures from the events surrounding the wedding.

Kardashian has been out of the spotlight for the past few months. But after being photographed in the airport on his way from L.A. to Paris, Rob took to his Twitter account to address comments on his weight and rumors that he had attended a weight-loss camp. "First, I don't believe in rehab or therapy or anything of that sort and second, I'm a grown man and will work on myself when I choose," he tweeted.