Kim Kardashian Loves Her Niece!!!

Kourtney Kardashian is a mother for the second time, and her family is really excited over this fact.

Yesterday, Khloe Kardashian said she was literally going to explode over becoming an aunt once again. And now Kim Kardashian has chimed in with a similar sentiment, writing on Twitter about Penelope Disick:
"I'm so in love with my niece!"

Kardashian also laid out a challenge to every other two-year old on the planet, blogging Monday about her niece and nephew, Mason:

"I know Mason is going to be the best big brother in the whole world. Congratulations Kourtney and Scott."

Oh, it's on, tykes around the world! Don't let the Kardashians win. Brother the heck out of your siblings. Do it for all of us.