So, during Kardashian's guest spot on Jimmy Kimmel Live! Monday night, Kimmel decided to give their now-shared territory a competitive spin.
After North West's mom claimed she's "obsessed" with changing diapers, Kimmel set up a competition between the two, to see who could change the most diapers.
Stepping onto a pink nursery set and using toy dolls, the two kicked off their challenge – though Kimmel managed to get wet. (Figure that one out for yourself.)
SPOILER ALERT: Kardashian won. Watch the full clip below.