Kourtney Kardashian expressed sadness as her eldest son, Mason, 14, chose not to join their family vacation to Sydney, Australia, with Travis Barker and their other children. Mason stayed back with his dad, Scott Disick, leading to Kourtney's heartfelt feelings of missing him during the trip. Despite the heartache, Kourtney made the most of her time in Australia, sharing moments with her kids and newborn, Rocky. Efforts to convince Mason to come on the trip were unsuccessful, highlighting the family dynamic and emotional challenges faced by Kourtney during the vacation.