Yikes, there's some serious sister drama going down on "Keeping Up With The Kardashians."

On this Sunday's upcoming episode of the reality show, Kim asked her sister Kourtney to appear in her ridiculously successful mobile game, Kim Kardashian: Hollywood. By the way, if you haven't played it yet, then I will warn you, you'll become addicted.

The oldest Kardashian sister wants no part of the game -- although she now appears in it -- and tells Kim just that. Mrs. Kanye West can't seem to understand why, since she's done "so much" for her sister.

"It's ridiculous for you to just not do that for me as a favor, because I've done so much for you," Kim said.

Kim then brings up the fact that Kourtney's boyfriend, Scott Disick, who recently checked into rehab, called her up to suggest bribing Kourtney with shoes to appear in the game.

"And for Scott to call me and say, 'You should buy her a pair of shoes to put her character in the game,' I'm like, 'Buy her a pair of shoes? All the sh-- I've done for her?'" she said. "I said to Scott, 'I'm not buying her a f--king pair of shoes – I bought her a f--king career!'"

The clip cuts before we can hear Kourtney's response, but by the looks of it, she does not seem too happy.

Kim's other sisters Kendall and Kylie Jenner were just added to the game as well, but the real question now is: where is North and her "Frozen" suitcase?!