Kourtney Kardashian, 44, apparently has a strict “invite-only” rule when it comes to her new son. The reality star and her husband, Travis Barker, 47, welcomed Rocky 13 Barker to the world earlier this month and is being cautious about when she will introduce him to family members, according to the US Sun. The outlet also revealed that her sister Kim Kardashian, 43, has yet to meet the newborn.