Photo: Kourtney Kardashian InstagramKourtney Kardashianis cherishing her sons' special day.Both Reign, 8, and Mason, 13, celebrate their birthdays on Dec. 14 — the two brothers born five years apart.“December 14th… one of the best days of my life, twice and forever. my birthday boys,” the mom-of-three — who also shares daughter Penelope, 10, with exScott Disick— wrote on Instagram.Alongside her message, thePooshfounder, 43, posted a cuddly throwback photo of the bonded brothers in their PJs.Her sisterKim Kardashian, in a Instagram tribute of her, shared a current photo of Kourtney’s oldest on her Stories.“The day has come when you’re taller than me now,” the proud aunt wrote over a photo of a grown-up looking Mason wearing a back-pack and black sunglasses. “I just love who you are and I’m just so proud of you Mason.““Welcome to your teenage years. Happy Birthday,” she added.Kim Kardashian InstagramEarlier in the day, grandma-of-twelveKris Jennershared a special post for her grandsons, calling them “two of the brightest lights in my life.““Mason, you are my first-born grandson, and I am so very proud of you each and every day!” Jenner, 67, began. You’ve grown into such an amazing young man, and I adore you.““Reign, you are the funniest!!!!” she added of the second birthday boy. “You are one special guy with so many facets to your personality!!!““Both of you have the most amazing qualities and are kind, considerate, loving, so smart, so talented in so many ways, and such a special magical part of our family … AND it’s wild that you were born on the very same day!!!! Five years apart!!!!“Kourtney has been vocal about wanting another child, thoughshared in Septemberthat she and husbandTravis Barkerhave taken a break with their IVF journey,She regularly expresses her gratitude for her blended family, including a scene on the season finale ofThe Kardashiansin which the group gathered together for dinner.Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.“Our family’s expanding and growing and we have so much to be thankful for,” Kourtney explained in a confessional, in reference to Barker’s teenagers with ex Shanna Moakler: Landon, 19, and Alabama, 16. He is also a step-father to Moakler’s daughter, Atiana De La Hoya, 23.“I love the idea of a blended family,” she continued. “I think that the more kids, the merrier. You have all these siblings and more people to love. It’s a beautiful thing.”
Photo: Kourtney Kardashian Instagram

Kourtney Kardashianis cherishing her sons' special day.Both Reign, 8, and Mason, 13, celebrate their birthdays on Dec. 14 — the two brothers born five years apart.“December 14th… one of the best days of my life, twice and forever. my birthday boys,” the mom-of-three — who also shares daughter Penelope, 10, with exScott Disick— wrote on Instagram.Alongside her message, thePooshfounder, 43, posted a cuddly throwback photo of the bonded brothers in their PJs.Her sisterKim Kardashian, in a Instagram tribute of her, shared a current photo of Kourtney’s oldest on her Stories.“The day has come when you’re taller than me now,” the proud aunt wrote over a photo of a grown-up looking Mason wearing a back-pack and black sunglasses. “I just love who you are and I’m just so proud of you Mason.““Welcome to your teenage years. Happy Birthday,” she added.Kim Kardashian InstagramEarlier in the day, grandma-of-twelveKris Jennershared a special post for her grandsons, calling them “two of the brightest lights in my life.““Mason, you are my first-born grandson, and I am so very proud of you each and every day!” Jenner, 67, began. You’ve grown into such an amazing young man, and I adore you.““Reign, you are the funniest!!!!” she added of the second birthday boy. “You are one special guy with so many facets to your personality!!!““Both of you have the most amazing qualities and are kind, considerate, loving, so smart, so talented in so many ways, and such a special magical part of our family … AND it’s wild that you were born on the very same day!!!! Five years apart!!!!“Kourtney has been vocal about wanting another child, thoughshared in Septemberthat she and husbandTravis Barkerhave taken a break with their IVF journey,She regularly expresses her gratitude for her blended family, including a scene on the season finale ofThe Kardashiansin which the group gathered together for dinner.Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.“Our family’s expanding and growing and we have so much to be thankful for,” Kourtney explained in a confessional, in reference to Barker’s teenagers with ex Shanna Moakler: Landon, 19, and Alabama, 16. He is also a step-father to Moakler’s daughter, Atiana De La Hoya, 23.“I love the idea of a blended family,” she continued. “I think that the more kids, the merrier. You have all these siblings and more people to love. It’s a beautiful thing.”
Kourtney Kardashianis cherishing her sons' special day.
Both Reign, 8, and Mason, 13, celebrate their birthdays on Dec. 14 — the two brothers born five years apart.
“December 14th… one of the best days of my life, twice and forever. my birthday boys,” the mom-of-three — who also shares daughter Penelope, 10, with exScott Disick— wrote on Instagram.
Alongside her message, thePooshfounder, 43, posted a cuddly throwback photo of the bonded brothers in their PJs.
Her sisterKim Kardashian, in a Instagram tribute of her, shared a current photo of Kourtney’s oldest on her Stories.
“The day has come when you’re taller than me now,” the proud aunt wrote over a photo of a grown-up looking Mason wearing a back-pack and black sunglasses. “I just love who you are and I’m just so proud of you Mason.”
“Welcome to your teenage years. Happy Birthday,” she added.
Kim Kardashian Instagram

Earlier in the day, grandma-of-twelveKris Jennershared a special post for her grandsons, calling them “two of the brightest lights in my life.”
“Mason, you are my first-born grandson, and I am so very proud of you each and every day!” Jenner, 67, began. You’ve grown into such an amazing young man, and I adore you.”
“Reign, you are the funniest!!!!” she added of the second birthday boy. “You are one special guy with so many facets to your personality!!!”
“Both of you have the most amazing qualities and are kind, considerate, loving, so smart, so talented in so many ways, and such a special magical part of our family … AND it’s wild that you were born on the very same day!!!! Five years apart!!!!”
Kourtney has been vocal about wanting another child, thoughshared in Septemberthat she and husbandTravis Barkerhave taken a break with their IVF journey,
She regularly expresses her gratitude for her blended family, including a scene on the season finale ofThe Kardashiansin which the group gathered together for dinner.
Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.
“Our family’s expanding and growing and we have so much to be thankful for,” Kourtney explained in a confessional, in reference to Barker’s teenagers with ex Shanna Moakler: Landon, 19, and Alabama, 16. He is also a step-father to Moakler’s daughter, Atiana De La Hoya, 23.
“I love the idea of a blended family,” she continued. “I think that the more kids, the merrier. You have all these siblings and more people to love. It’s a beautiful thing.”
source: people.com