In a preview for next week’s ‘Keeping Up With the Kardashians,’ Addison Rae makes her long-awaited debut on the E! reality series. Meanwhile, on Thursday’s episode, Rob Kardashian made a rare appearance at the family’s Malibu home. Scott Disick and Kourtney Kardashian also decided they’re best as co-parents, despite her sisters’ best attempts to rekindle the romance between the former couple. ‘Keeping Up With the Kardashians’ airs Thursdays on E!.