It should be the happiest time of the year for the Kardashians; Kim and Kanye West welcomed baby Saint on Dec. 5 and Kourtney celebrated the birthday of sons Mason and Reign on Dec. 14 — but a break-in at matriarch Kris Jenner's home on Tuesday has the family shaken up. A crazed fan walked right through the front door and into the home office, where he came face-to-face with a shocked Kris. Making the intrusion even more disturbing is the fact that Kim, North, and Saint were all home at the time (they're staying there while their mansion undergoes renovations). While the fan was escorted out the neighborhood and detained by police, Kris is understandably fuming that such a lapse in security could happen despite the 24-hour surveillance she has on her home. She reportedly fired her entire security team and Kanye has sent his security detail of off-duty cops to stand guard over the house until everything gets sorted out. Hopefully they'll be back to safe and sound by Christmas.