Although reps are denying it, sources are insisting that Kim Kardashian and little brother Rob Kardashian got into a heated argument ahead of her wedding to Kanye West.

According to RadarOnline.com, North West's mom accused her brother of leaking negative stories about her to the media which caused the Arthur George sock designer to leave Paris before his sister's Italian wedding.

The insider also claimed that the Kardashian Kollection designer hurt her sibling's feeling by bringing up the issue of his weight.

The source revealed, "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 insider confessed, "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," adding, "So, he packed his bags, and left Paris before the wedding. He wanted nothing to do with it, and thought it was ridiculous that Kim's third marriage was so over the top."

Apparently when Rob Kardashian flew to Paris with his mother, Kris Jenner, he had every intention on attending all of the wedding activities.

A friend of the overweight star revealed, "He's looking sad and 'depressed' big time right now," adding, "He's not exactly the famous one in his family and he sort of feels like he's nobody except the Kardashian name."

Rob is well aware that he lives in the shadows of his famous sisters Kim, Kourtney and Khloe Kardashian, half-sisters Kylie and Kendall Jenner as well as their mother Kris. The blow to his self-esteem has caused him to self-medicate.

An insider revealed, "He takes Xanax and has been drinking really heavily," adding, "Not to mention he's eating like crazy!

"The last thing Rob should be worried right now is about his weight....it's just a symptom of his problems. He is clearly struggling and needs the support and love of his family.

"Judging him, making snarky comments about his weight, and so called lack of ambition isn't helping."