Kylie Jenner has stayed awfully quiet amid rumors of her unexpected pregnancy, and now she's even refused to appear in her Kardashian family's Christmas special! A source told Breaking Celebrity News that the 20-year-old reality star was at the shoot, yet remained in "hiding" because she is not yet ready to show the world her baby bump!

In the photo posted by momager Kris Jenner, 61, the entire Kardashian-Jenner clan was present – even pregnant sister Khloe Kardashian, 33, and BFF Jonathan Cheban, 43, dressed as Santa Claus. So why is Kylie so reluctant to show her growing belly?