During a family trip to the Greek island of Mykonos in early May, a then-seven-months pregnant Kim Kardashian tossed around a few baby names with her stepbrother, Brody Jenner, and her older sister, Kourtney Kardashian. "I'm feeling North," Brody said presciently. "North West."

"Me too!" Kourtney agreed. "It's pretty and cool."

Kim, 32, then revealed that she and boyfriend Kanye West "kind of" wanted to give their daughter a name beginning with the letter K, but she explained that they had some reservations. "Our kid, if it's a K, then they'll call us the KKK," she worried, referencing the white supremacist group, the Ku Klux Klan. Jenner, however, didn't think the public would draw such a comparison. "That's a little crazy," he argued.

The reality star -- who welcomed daughter North five weeks early on June 15 -- also pondered how to make sure her little girl stays grounded despite having privileged parents. "Kourtney's like, 'You need a playroom .  . . I didn't have a playroom! I just played in my room and then I cleaned it up," Kim said. "Like, how much do you give them, you know?"

Jenner, 29, then told his stepsister, "You're gonna be a good mom, Kim."

Keeping Up With the Kardashians airs Sunday, July 28, at 9 p.m. EST on E!