True Thompson Turns 4 In Style With Wonderful Birthday Bash -- But North West Has A BIG Warning For Her Cousin!

Kim Kardashian's daughter North West tells cousin True 'four sucks' at her bithday party

North West, 8, sends sassy message to her cousin True Thompson at her birthday bash: 'Four sucks!'

True Thompson Dances With Cousin Stormi At Her Cat-Themed 4th Birthday Bash: Watch