Kanye West Is 'Furious' at Scott Disick over Treatment of Kourtney Kardashian.

Kourtney Kardashian has an unexpected ally in her corner: brother-in-law Kanye West.

While most of the Kardashians have rallied around Kourtney in the wake of her split, West is channeling some of his energy toward Scott Disick.

"Kanye is furious, maybe the most furious of everyone," says a source close to West, 38. "He's saying that a real man doesn't abandon his family like Scott is doing."

"He has made it crystal clear that he's willing to step in and be a strong male figure to the kids if they need him to be," says the source. "He feels strongly about that."

But even West would consider letting bygones be bygones if Disick, 32, would make an effort.

"If Scott comes back and faces things like a grown man, he'll be surprised how much forgiveness there can be – from every member of the family," says the source. "He needs to have a healthy relationship with his kids, and he can't have that unless he has a healthy relationship with Kourtney and her family. Everyone's hoping he finally makes the right choice."