Scott Disick gives Son Mason a sweet ride for his 15th birthday

“Our birthday twins! I still can’t believe you two share the exact same birthday,” she wrote on her Instagram alongside several throwback photos of the siblings. “What a special blessing that binds you together forever. You are both so deeply loved and I am eternally grateful to God for choosing me to be your grandmother.”

She continued: “Mason, you are so kind, creative, smart, talented and the best brother, son, grandson, cousin and friend. Watching you grow up to be such a caring and wonderful young man is pure magic – you make us everyone so proud.”