Khloe Kardashian: Mason Already Loves Being a Big Brother

The reality star says her nephew adores his new baby sister Penelope -- and so does she!

Khloe Kardashian couldn't be happier to have a brand-new neice! One day after her eldest sister Kourtney gave birth to baby girl Penelope Scotland, Auntie Khloe is already gushing about the newest member of their family.

"I'm an auntie again!!!!!!!!!! As I'm sure you all know, my beautiful big sister gave birth yesterday to the most perfect baby girl you've EVER seen -- Penelope Scotland Disick!" Khloe, 28, wrote on her blog. "The entire family is literally exploding with joy and have not stopped fawning over our new little girl."

The Keeping Up with the Kardashians star also praised her no. 1 nephew, Mason, 2, for already stepping up his game as a big brother.

"And Mason is already loving being a big brother! This is just such a special and happy time for my family. Thank you to Kourt and Scott for making such beautiful babies! LOL."

The entire clan got public declarations of love in, including teen aunt Kendall Jenner, 16, who wrote on Twitter: "Great day! #babytime #PenelopeScotland."

But middle sister Kim Kardashian was the first to publicly celebrate baby Penelope's birth -- and mention the urge to spoil the baby.

"She is absolutely perfect! I am so excited to be an aunt again and can't wait to spoil little Penelope," Kim, 31, wrote on Monday.

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