North West And Mason Hold Hands As Kim And Kourtney Kardashian Take Them To A Birthday Party

Mason Disick is now the man of the house since his mother's split with long-time boyfriend Scott Disick. And even at five-years-old, the young boy is showing himself to be quite the little gentleman.

The eldest child of Kourtney Kardashian sweetly held hands with his younger cousin North West as they left a birthday party at My Gym in Woodland Hills, California on Sunday.

Also seen at the celebration was Mason's mother and Kim's older sister Kourtney, who was accompanied by her two youngest: daughter Penelope and son Reign. The 36-year-old mother-of-three looked absolutely fabulous in a lacy white top featuring plenty of holes to show off her matching bra and svelte figure. More pictures below;