The 36-year-old reality star accosted a groupie on Sunday's episode of Keeping Up with the Kardashians after she discovered the woman hiding in Disick's bathroom.
Kim was staying with Scott, her sister Kourtney Kardashian's ex-boyfriend, in Dubai when she realized "something [was] up" and stormed up to his room. She cursed at the woman and called her a "tramp" before telling her to get "out of here."
The dramatic scene took place after Scott heard reports that Kourtney was "hooking up with someone" back home. The rumor followed his friendly trip to Aspen with the 38-year-old star and their three children.
"This is probably the worst thing I could hear ever," he said on the show. "I feel like everything I've been working so hard for is kind of done now."
"I asked her to marry me," the star said. "It was somewhat cute and then we just got scared about media and this and that and we were like, 'Let's just put the ring aside and we'll talk about it another day.' Never spoke about it again."
Disick and Kourtney have had an up-and-down relationship since calling it quits. The pair share 7-year-old son Mason, 4-year-old daughter Penelope and 2-year-old son Reign.