Brody Jenner is taking good care of his step-sister Kim Kardashian, who is six months pregnant with her first child. The Hills vet lovingly rubbed the 5-foot-3 star's baby bump during E!'s Upfront event at The Grand at Manhattan Center Studios in New York City Apr. 22.

PHOTOS: Who Wore It Best, Kim Kardashian edition

The step-siblings -- who will both appear on the eighth season of Keeping Up with the Kardashians -- were joined by Kourtney Kardashian, Scott Disick and Kris Jenner at the star-studded gathering. Kourtney, 34, is particularly excited to have her half-brothers Brody and Brandon join their reality show.

PHOTOS: The Kardashians on vacation

"Our family is so layered and so complicated, so it's fun to have more layers and to be able to see them and what our relationship with them is like," she told Us Weekly. "And we've naturally just been spending more time with them. They came to Miami a few times when we were doing the show [Kourtney & Kim Take Miami], so it's fun."

VIDEO: Was Brody Jenner's relationship with Kristin Cavallari fake?

Kris, 57, explained that the reason her husband's children with ex-wife Linda Thompson had only made brief appearances on Keeping Up With the Kardsahians was due to scheduling conflicts. "The timing was always messed up," the talk show host told Us. "Now everyone's together and it's really fun!"

This article originally appeared on Brody Jenner Rubs Step-Sister Kim Kardashian's Baby Bump