Enjoy it while it lasts, little Mason, pretty soon you'll morph from baby of the family to big brother. That's right — Mason's mom, Kourtney Kardashian, is expecting another child with boyfriend Scott Disick, the reality starlet confirmed to UsWeekly.

Kourtney, 32, and Disick, 28, welcomed Mason into the world in December of 2009, when she gave birth in front of cameras on the season 4 finale of "Keeping Up with the Kardashians." Now Mom says she is nine weeks along and can't keep it a secret any longer. "You're supposed to wait 12 weeks to tell people, but I feel confident," she said.

Disick, whose five-year relationship with Kourtney has seen its ups and down, said the pregnancy wasn't planned, per se, but it also wasn't unwelcome. "It wasn't like we weren't trying. We kind of just said, 'If it's meant to be, it'll be.'" Guess it was meant to be.