Kourtney Kardashian and Scott Disick co-parent children Mason, 11, Penelope, eight, and Reign, six, and they couldn't be prouder of them!MORE: Kourtney Kardashian's son Mason transforms appearance in rare photoOn Monday, Scott took to Instagram to share a sweet throwback photo of eldest son Mason, alongside a heartfelt message. The Talentless founder posted a picture of the pair of them holding hands while travelling on Scott's private jet.