"Slumber party with Mason and Penelope!" Kim, 31, tweeted Saturday. The next morning she shared a picture of Kourtney, writing, "I woke up this morning to this . . . gotta love Kourtney Kardashian making breakfast."
In the hilarious photo, Kourtney, 33, wears a sock monkey hat and flashes the peace sign at the camera while standing by the stove cooking breakfast in her gourmet kitchen. The Keeping Up With the Kardashians star also has her daughter Penelope sleeping soundly in a sling around her stomach.