Rob Kardashian's weight gain can be the overriding factor behind his decision to possibly skip the wedding of Kim Kardashian and Kanye West in Paris, France. Kris Jenner’s only son’s battle with fat seems to be far from over.

Radar Online reported that Rob Kardashian has no desire of attending the lavish wedding. "Rob is upset about his changing shape and truly feels like the black sheep of the family."

"Of course, that could change. Kim is his sister. He loves her. But he knows this will be all about Kim and as usual, Rob feels he would be like the third wheel," the insider added.

Earlier, MailOnline reported that Rob Kardashian's concern over his weight gain has him seriously considering a major stomach operation. The "Keeping Up with the Kardashian" star reportedly tipped the scales at 260Ibs.

But the sock mogul was not satisfied with the way his diet is going ahead of Kim Kardashian and Kanye West's wedding.

Meanwhile, National Enquirer reported that Rob Karashian's weight gain problem is aggravated as he really "hates gyms."

"But he's under strict orders from Kris to lose 70lbs before Kim's wedding to Kanye West this summer," the source said, adding that the only way for the reality star to lose that much weight in so short a period of time is "getting his stomach stapled," the publication added.

His greatest critic seems to be Kris Jenner who has very harsh of Rob Kardashian's weight gain, Star reported.

"She called him a fat slob and said he's losing out on business opportunities because no one wants someone as huge as him representing their products," the source told Star.

"This procedure is a major operation. But being the ugly duckling in the family has affected Rob deeply. Everyone's worried about him," the Enquirer added.

Kris Jenner also suggested that the sock entrepreneur should enrol himself on a "fat camp" because his weight gain has caused an embarrassment to the family. The news website added that the other Kardashian sisters, Kim, Khloe and Kourtney were supposedly behind their mother since they are also "embarrassed to be photographed with him."