Mason Disick might only be two years old but according to sources is already the perfect big brother to new arrival Penelope Scotland born to reality TV star's hottest couple Kourtney Kardashian and Scott Disick (July 8).
Despite only being a week old, Kourtney Kardashian's first born little Mason is already fiercely protective of his younger sister.
"He's really excited about having a new playmate and has actually showed an incredibly mature side," a source told OK! Magazine.
"He's really shaping up to become a super protective big brother." Kourtney and Scott are said to be bringing their baby home to quite the nursery and have even let Mason help pick out what he wants for baby Pen.
"Kourtney let Mason pick out some furniture," the source explained.
"Kourtney and Scott have been pretty sensible about it. They included Mason in decisions about the nursery and everything else that's been going on. He's quite fascinated by all the new girly toys.”
But things aren't going completely smoothly as it seems inter-decoration wise Mason is not on the same page as mummy Kourt.
They added: “The only problem was that Kourtney wanted to baby's nursery to be white and Mason's favourite colour is blue!"
Mason was spotted over the weekend enjoying a day at the beach with auntie Kendall Jenner. Clearly a sports fan the little heartbreaker chased his aunt all over the sand as they took some time away from baby Penelope.
Mason Disick And Kendall Jenner Enjoy Beach Day, July 15 (Twitter)
Mason And The Kardashian Klan In New York.....