Khloe Kardashian Upset Over News Kourtney & Scott Disick Are Expecting

At this rate, Khloe Kardashian is gonna have a hard time keeping up with her baby boy. 

The Kardashians star shared a precious update on her son Tatum, posting a special video of the 11-month-old, crawling at home July 17. Khloe captured Tatum—who she welcomed via surrogate with ex Tristan Thompson—racing around on the floor on her Instagra…