Kourtney Kardashian is a doting mother to three children and as her oldest son Mason is getting older, he has preferred to keep out of the spotlight – with his famous parents rarely sharing photos of him on social media.MORE: Kim Kardashian shares adorable family photo with children to mark special occasionHowever, fans were delighted over the weekend after his dad, Scott Disick, shared a sweet picture featuring the 11-year-old and his younger siblings Penelope, nine, and Reign, six, playing on