"I just wanted to tell you that I am pregnant," she informs him.
But Scott's reaction to the news is even more shocking…and unexpected.
"I can't handle this responsibility," he stammers. "I just can't take care of more kids."
When he confronts Kourtney about not telling him sooner, she explains that she knew he was going to freak out—which is the precise reason why she kept her pregnancy a secret for the past few weeks.
"It takes two to tango," Kourtney points out. "What did you think was gonna happen?"
Watch the above clip to see Scott's full reaction to the news and tune-in this Sunday to see if Scott comes around!
Tune-in to a special 90-minute Keeping Up With the Kardashians wedding lead-up episode on Sunday, August 31 at 9/8c and tune-in to the big season finale on Monday, September 1 at 9/8c on E!